CA1191658A - Agent for dissolving insoluble iron(iii) compounds in highly alkaline textile treatment liquors - Google Patents
Agent for dissolving insoluble iron(iii) compounds in highly alkaline textile treatment liquorsInfo
- Publication number
- CA1191658A CA1191658A CA000423343A CA423343A CA1191658A CA 1191658 A CA1191658 A CA 1191658A CA 000423343 A CA000423343 A CA 000423343A CA 423343 A CA423343 A CA 423343A CA 1191658 A CA1191658 A CA 1191658A
- Authority
- CA
- Canada
- Prior art keywords
- agent
- compounds
- iii
- weight
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/32—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond
- D06M11/36—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond with oxides, hydroxides or mixed oxides; with salts derived from anions with an amphoteric element-oxygen bond
- D06M11/38—Oxides or hydroxides of elements of Groups 1 or 11 of the Periodic System
Abstract
ABSTRACT OF THE DISCLOSURE
An agent, based on reducing agents and complexing agents, for dissolving insoluble iron(III) compounds in aqueous textile treatment baths which are at a pH of 10 or more, which agent has the following composition:
a) from 4 to 65% by weight of one or more water-soluble hydroxycarbonyl compound or of an N- or O-acetal thereof, as the reducing agent, b) from 10 to 80% by weight of one or more complexing agent which complexes Fe++ ions at a pH of 10 or more and c) water in an amount equal to 100% minus the amounts of a) and b).
An agent, based on reducing agents and complexing agents, for dissolving insoluble iron(III) compounds in aqueous textile treatment baths which are at a pH of 10 or more, which agent has the following composition:
a) from 4 to 65% by weight of one or more water-soluble hydroxycarbonyl compound or of an N- or O-acetal thereof, as the reducing agent, b) from 10 to 80% by weight of one or more complexing agent which complexes Fe++ ions at a pH of 10 or more and c) water in an amount equal to 100% minus the amounts of a) and b).
Description
s~
- 1 - O.Z. 0050/35804 Agent for dissolv;ng ;nsoluble ;ron~III) compounds ;n _ _h;ghly alkal;ne text;le treatment l;~uors_ _ _ In the pretreatment of cotton or other cellulosic text;le goods, a problem commonly encountered ;s that, because these treatment steps are carried out in a highly alkaline medium, ie. at a pH of 10 or more, iron~III) hydrox;de or Fe203 precipitates on the fabric and forms rust spots. Rust spots are also produced on the fabric due to the production method, namely caused by metal abrasion during ~eaving or caused by metaL packaging straps. These prec;pitates, hereafter referred to, for simplicity, as rust, can, during the subsequent peroxide bleach, lead to severe catalytic damage, ie. to holes in the fabric.
It is known that in an al~aline medium d;valent iron can be complexed more easily at relat;vely high con-centration than trivalent iron. This can be explained in terms of the extremely low solubility of iron(~II) hydr-oxide. The solub;lity product of Fe(OH)2 depends only on the square and not, as in the case of Fe(OH)3,on the cube of the-OH ion concentratior,.
For this reason, inorganic reducing agents have hitherto been added to the textile treatment liquors.
German Published Appl;cation DAS 1,042,165 (Example
- 1 - O.Z. 0050/35804 Agent for dissolv;ng ;nsoluble ;ron~III) compounds ;n _ _h;ghly alkal;ne text;le treatment l;~uors_ _ _ In the pretreatment of cotton or other cellulosic text;le goods, a problem commonly encountered ;s that, because these treatment steps are carried out in a highly alkaline medium, ie. at a pH of 10 or more, iron~III) hydrox;de or Fe203 precipitates on the fabric and forms rust spots. Rust spots are also produced on the fabric due to the production method, namely caused by metal abrasion during ~eaving or caused by metaL packaging straps. These prec;pitates, hereafter referred to, for simplicity, as rust, can, during the subsequent peroxide bleach, lead to severe catalytic damage, ie. to holes in the fabric.
It is known that in an al~aline medium d;valent iron can be complexed more easily at relat;vely high con-centration than trivalent iron. This can be explained in terms of the extremely low solubility of iron(~II) hydr-oxide. The solub;lity product of Fe(OH)2 depends only on the square and not, as in the case of Fe(OH)3,on the cube of the-OH ion concentratior,.
For this reason, inorganic reducing agents have hitherto been added to the textile treatment liquors.
German Published Appl;cation DAS 1,042,165 (Example
2) d;scloses that, for example, a m;xture of sodium dithio-n;te, tr;ethanolam;ne, sod;um citrate, anionic wettinq agent and a soft-ceresine may be used as a rust remover for textile goods.
German Published Application DAS 2,735,816 discloses - 2 - O.Z. 0050/35~04 a process for bleaching and desizing cellulosic textile goods, wherein a mixture of sodium dithionite, an amino-polycarboxylic acid, eg. ethylenediaminetetraacetic acid, and a buffer is employed as a heavy metal complexing agent, ie., inter alia, as an iron complexing agent.
~ isadvantages of these methods are, first, the unavoidable formation of sulfites, which pass into the effluent and, as is known, severely pollute the environ-ment, and, secondly, the fact that even at a high pH of 10 or more the effect achieved is still inadeqwate.
It is an object of the present invention to pro-vide an agent ~hich even at a high pH, such as is neces-sary in alkaline pretreatment processes in the textile industry, reduces iron(III) compounds and immediately con-verts the resulting iron(II) compound into a stable, soluble iron complex, which even air in the pretreatment liquor, and prolonged standing, do not render insoluble.
It is a further object of the invention to provide an agent for the said purpose, which does not lead to harmful products in the effluent.
We have found that the~se objects are achiev-ed by providing agents as defined in claims 1 and 2.
We have found that water~soluble hydroxycarbonyl compounds or their N- or 9-acetals have, at a pH of 10 or more, a redox potential which suff;ces to reduce trivalent ;ron to divalent iron.
The hydroxycarbonyl compound ~component a) may be an aldehyde or a ketone. The only precondition is that it should be water-soluble under the prevailing process S~
German Published Application DAS 2,735,816 discloses - 2 - O.Z. 0050/35~04 a process for bleaching and desizing cellulosic textile goods, wherein a mixture of sodium dithionite, an amino-polycarboxylic acid, eg. ethylenediaminetetraacetic acid, and a buffer is employed as a heavy metal complexing agent, ie., inter alia, as an iron complexing agent.
~ isadvantages of these methods are, first, the unavoidable formation of sulfites, which pass into the effluent and, as is known, severely pollute the environ-ment, and, secondly, the fact that even at a high pH of 10 or more the effect achieved is still inadeqwate.
It is an object of the present invention to pro-vide an agent ~hich even at a high pH, such as is neces-sary in alkaline pretreatment processes in the textile industry, reduces iron(III) compounds and immediately con-verts the resulting iron(II) compound into a stable, soluble iron complex, which even air in the pretreatment liquor, and prolonged standing, do not render insoluble.
It is a further object of the invention to provide an agent for the said purpose, which does not lead to harmful products in the effluent.
We have found that the~se objects are achiev-ed by providing agents as defined in claims 1 and 2.
We have found that water~soluble hydroxycarbonyl compounds or their N- or 9-acetals have, at a pH of 10 or more, a redox potential which suff;ces to reduce trivalent ;ron to divalent iron.
The hydroxycarbonyl compound ~component a) may be an aldehyde or a ketone. The only precondition is that it should be water-soluble under the prevailing process S~
- 3 - O.Z~ 0050/35804 conditions and carry a hydroxyl group in the ~-position to the carbonyl group. The carbonyl group can aLso be N-or O-acetalized. These compounds include, for example, glycolaldehyde, glycerolaldehyde, dihydroxyacetone, hydroxy-acetone and the;r simple 0- and N-acetals, as well as monosacchar;des, such as glucose~ galactose~ tylose and fructose, wh;ch may be ;n their hemiacetal form or may have been reacted with amines such as diethanolamine ~N-acetal), and the disaccharides and polysaccharides which are bonded in an acetal-like (glucosidic~ manner and are water-soluble, such as sucrose and starch. The preferred components a3, because of being particularly easily obta;nable, are glucose or fructose and their reaction products w;th amines, eg. diethanolamine.
Component b) ;s the complexing agent. Th;s may be any compound ~hich is capable of bonding fe+~ ions, to a s;gn;f;cant degree, ;n the form of a stable complex at a pH of 10 or more, and thereby preventing precipita tion of Fe(OH)2).
Examples of such'''~compounds include gluconic acid, sorbitol, triethanolamine, hydroxyethanediphosphonic acid or adducts of polyalkylenepolyamines w;th from 2 to 10 moles of an alkylene oxide, preferably adduces of poly-ethyleneimine, contain;ng from 2 to 6 recurring ethylene-imine units, with from 2 to 10 moles of ethylene oxide or propylene oxide. Other well-known complexing agents, such as aminopolycarboxylic acids, are no longer sufficiently active under these pH conditions.
The formulation contains from 4 to 65, preferably - ~ - O.Z. 0050/35804 from 10 to 35,% by ~eight of component a) and from 10 to ~0, preferably from 25 to 60, % by weight of component b)~ the remainder being water.
In addition to the agents according to the inven-tion, dispersants may also be used, in amounts of up to 25% by weight based on the formulation; particular ex-amples are polyacrylic acid, copolymers of acrylic acid and rnale;c ac;d~ ~olymale;c acid and rnale;c anhydride/
v;nyl ether copolymers.
The agents are especially employed in the pre-treatment of text;le goods consisting of, or containing, cellulose. In addition to the conventional constituents, the alkaline treatment liquors contain, based on the liquor, and assuming a liquor ratio of 1:1, from O.Z to 15, preferably from 0O3 to 12, % by we;ght of the agents accord;ng to the ;nvent;on.
The Examples wh;ch follow illustrate the invention.
The ability of the mixtures to d;ssolve iron hydr-oxide precipitates was tested as follows. A defined amount of iron hydroxide precipitate ~as produced in a sodium hydroxide solution of a defined concentration~ by adding from 1 to 10 ml of a 10X strength solution of FeCl3.6H20 in ~ater. The precipitate was then left to stand for 60 minutes at 50C. Thereafter, the mix tures claimed were added to the sodium hydroxide solutions at 8û~90C and the time required for the precipitate to dissolve was recorded.
A mixture was prepared from:
s~
- 5 - O.Z. 0050/35804 37.5X of 50% strength gluconic acid in H2û
12.5% of glucose monohydrate X of triethanolamine An iron hydroxide precipitate (~'159 mg) was pro-duced in 200 ml of a 10% strength sodium hydroxide solu-tion with 4 ml of the 10% strength FeCl3.6H20 solution.
It proved poss;ble to dissolve th;s prec;p;tate within 30 minutes at 8ûC by adding 1.0 9 of mixture 1. On adding 2 9 of the m;xture, the prec;p;tate d;ssolved w;th;n 4 minutes. If the concentration of the sodium hydroxide solution ~as reduced to 5%, it was necessary to add 1.25 9 of mixture 1 to dissolve the same amount of Fe(OH)3 precip1tate after 30 minutes at 80C.
Sodium hydroxide Dissolution Amount of mixture 1 solution Concentrationtime added, in 9/200 ml in % in min.
. _ .
1.0
Component b) ;s the complexing agent. Th;s may be any compound ~hich is capable of bonding fe+~ ions, to a s;gn;f;cant degree, ;n the form of a stable complex at a pH of 10 or more, and thereby preventing precipita tion of Fe(OH)2).
Examples of such'''~compounds include gluconic acid, sorbitol, triethanolamine, hydroxyethanediphosphonic acid or adducts of polyalkylenepolyamines w;th from 2 to 10 moles of an alkylene oxide, preferably adduces of poly-ethyleneimine, contain;ng from 2 to 6 recurring ethylene-imine units, with from 2 to 10 moles of ethylene oxide or propylene oxide. Other well-known complexing agents, such as aminopolycarboxylic acids, are no longer sufficiently active under these pH conditions.
The formulation contains from 4 to 65, preferably - ~ - O.Z. 0050/35804 from 10 to 35,% by ~eight of component a) and from 10 to ~0, preferably from 25 to 60, % by weight of component b)~ the remainder being water.
In addition to the agents according to the inven-tion, dispersants may also be used, in amounts of up to 25% by weight based on the formulation; particular ex-amples are polyacrylic acid, copolymers of acrylic acid and rnale;c ac;d~ ~olymale;c acid and rnale;c anhydride/
v;nyl ether copolymers.
The agents are especially employed in the pre-treatment of text;le goods consisting of, or containing, cellulose. In addition to the conventional constituents, the alkaline treatment liquors contain, based on the liquor, and assuming a liquor ratio of 1:1, from O.Z to 15, preferably from 0O3 to 12, % by we;ght of the agents accord;ng to the ;nvent;on.
The Examples wh;ch follow illustrate the invention.
The ability of the mixtures to d;ssolve iron hydr-oxide precipitates was tested as follows. A defined amount of iron hydroxide precipitate ~as produced in a sodium hydroxide solution of a defined concentration~ by adding from 1 to 10 ml of a 10X strength solution of FeCl3.6H20 in ~ater. The precipitate was then left to stand for 60 minutes at 50C. Thereafter, the mix tures claimed were added to the sodium hydroxide solutions at 8û~90C and the time required for the precipitate to dissolve was recorded.
A mixture was prepared from:
s~
- 5 - O.Z. 0050/35804 37.5X of 50% strength gluconic acid in H2û
12.5% of glucose monohydrate X of triethanolamine An iron hydroxide precipitate (~'159 mg) was pro-duced in 200 ml of a 10% strength sodium hydroxide solu-tion with 4 ml of the 10% strength FeCl3.6H20 solution.
It proved poss;ble to dissolve th;s prec;p;tate within 30 minutes at 8ûC by adding 1.0 9 of mixture 1. On adding 2 9 of the m;xture, the prec;p;tate d;ssolved w;th;n 4 minutes. If the concentration of the sodium hydroxide solution ~as reduced to 5%, it was necessary to add 1.25 9 of mixture 1 to dissolve the same amount of Fe(OH)3 precip1tate after 30 minutes at 80C.
Sodium hydroxide Dissolution Amount of mixture 1 solution Concentrationtime added, in 9/200 ml in % in min.
. _ .
1.0
4 2.0 1.25 3.5 2.5 A mixture of 63% of 50~ strength gluconic acid 13% of ethylenediamine reacted with 4 moles of propylene oxide and 24% of 70% strength hydroxyacetone in HzO was used.
79 mg of Fe~OH)3 precipitate were produced in 6~i~
- 6 - O.Z. 0050/~580 200 ml of 8% and 4% strength sodium hydroxide solutions with 2 ml of the 10% strength FeCl3.~H2û solution. The dissolution experimen~ was carried out at 90C.
Sodium hydrox;de D;ssolut;on Amount of m;xture 2 solution Concentrat;ontime added~ ;n g/Z00 ml in % in m;n.
3 15 2.5 4 15 2.9 4.0 A m;xture of 34% of 50% strength gluconic acid in HzO, 8~ of ethylenediamine reacted with 4 moles of propylene oxide, 8% of diethylenetr;am;ne reacted with 5 moles of ethylene oxide, 24X of dextrose and 26% of 50% strength polyacrylic acid in H20 (K value 10-13) was used.
S9 ~9 of Fe(OH)3 precipitate were produced in 200 ml of 6% and 3X strength sodium hydroxide solutions with 1.5 ml ~f the 10% strength FeCl3.6HzO solution.
The dissolution experiment was carried out at 9~C.
~9~5~
~ 7 - O.Z. 0050/358v4 Sodium hydroxideDissolution Amount of mixture 3 solution Concentration time added, in g/2ûO ml in X in min.
. _ _ _ _ 6 15 2.9 6 5 4.0 3 20 3.0 3 7.5 4.0 A mixture of 37.5% of 50% strength gluconic acid, 2Z.5% of a reaction product of glucose with diethanolamine ~see belo~) and X of tr;ethanolamine was used.
The iron hydroxide dissolving ability was tested as in Example 1; 2.5 ml of 10~ strength FeCl3.~H20 solution were added to the dilute alkali (200 ml).
Sodium hydroxideMixture added, Dissolution time solution Concentrationin g per Z00 ml in min.
in X
~t 1.5 17 8 1.5 14 12 1.5 12 The ability of the mixtures to detach and dissolve rust present on cotton fabric was also tested. For this purpose, cotton cloth was impreynated with water which had been brought to pH 9.5 by adding sodium hydroxide solution, i5~
- 8 - O.Z. 0050/35804 and was then squeezed off. 1 drop (20 drops = 1 ml) of 5X
strength FeCl3.6H20 was then applied to each of three posi-tions. The cloth was then sprayed again with alkaline water and dried at room temperature for not less than 4~ hours.
Rust spots of about 2 cm diameter were formed on the fabric.
EXAMPLE S
The fabric with rust spots was introduced into 6%
and 10% strength sodium hydrox;de solution a~ 85C, using a long liquor ~liquor ratio 40:1). 3 g/liter of a wetting agent were added to the l;quors beforehand. On add;ng 5 9 of the m;xture from Example 1 per liter of liquor, a~l rust spots were removed in both cases; similar results were achieved in 12% strength sodium hydroxide solution.
Sodium hydroxide Dissolution time Amount of mixture solution in min. 1 added, in Concentration in Z g/liter . _ _ _ _ ~ 6.5 5 6 5.5 5
79 mg of Fe~OH)3 precipitate were produced in 6~i~
- 6 - O.Z. 0050/~580 200 ml of 8% and 4% strength sodium hydroxide solutions with 2 ml of the 10% strength FeCl3.~H2û solution. The dissolution experimen~ was carried out at 90C.
Sodium hydrox;de D;ssolut;on Amount of m;xture 2 solution Concentrat;ontime added~ ;n g/Z00 ml in % in m;n.
3 15 2.5 4 15 2.9 4.0 A m;xture of 34% of 50% strength gluconic acid in HzO, 8~ of ethylenediamine reacted with 4 moles of propylene oxide, 8% of diethylenetr;am;ne reacted with 5 moles of ethylene oxide, 24X of dextrose and 26% of 50% strength polyacrylic acid in H20 (K value 10-13) was used.
S9 ~9 of Fe(OH)3 precipitate were produced in 200 ml of 6% and 3X strength sodium hydroxide solutions with 1.5 ml ~f the 10% strength FeCl3.6HzO solution.
The dissolution experiment was carried out at 9~C.
~9~5~
~ 7 - O.Z. 0050/358v4 Sodium hydroxideDissolution Amount of mixture 3 solution Concentration time added, in g/2ûO ml in X in min.
. _ _ _ _ 6 15 2.9 6 5 4.0 3 20 3.0 3 7.5 4.0 A mixture of 37.5% of 50% strength gluconic acid, 2Z.5% of a reaction product of glucose with diethanolamine ~see belo~) and X of tr;ethanolamine was used.
The iron hydroxide dissolving ability was tested as in Example 1; 2.5 ml of 10~ strength FeCl3.~H20 solution were added to the dilute alkali (200 ml).
Sodium hydroxideMixture added, Dissolution time solution Concentrationin g per Z00 ml in min.
in X
~t 1.5 17 8 1.5 14 12 1.5 12 The ability of the mixtures to detach and dissolve rust present on cotton fabric was also tested. For this purpose, cotton cloth was impreynated with water which had been brought to pH 9.5 by adding sodium hydroxide solution, i5~
- 8 - O.Z. 0050/35804 and was then squeezed off. 1 drop (20 drops = 1 ml) of 5X
strength FeCl3.6H20 was then applied to each of three posi-tions. The cloth was then sprayed again with alkaline water and dried at room temperature for not less than 4~ hours.
Rust spots of about 2 cm diameter were formed on the fabric.
EXAMPLE S
The fabric with rust spots was introduced into 6%
and 10% strength sodium hydrox;de solution a~ 85C, using a long liquor ~liquor ratio 40:1). 3 g/liter of a wetting agent were added to the l;quors beforehand. On add;ng 5 9 of the m;xture from Example 1 per liter of liquor, a~l rust spots were removed in both cases; similar results were achieved in 12% strength sodium hydroxide solution.
Sodium hydroxide Dissolution time Amount of mixture solution in min. 1 added, in Concentration in Z g/liter . _ _ _ _ ~ 6.5 5 6 5.5 5
5.2 5.8 The fabric with rust spots ~as impregnated with a liquor which consisted of 8% strength sodium hydroxide solution and to which 4 g/liter of wetting agent and 70 g/liter of the m;xture from Example 2 had been added. It was then squeezed off to a wet pick-up of 100%.
The moist fabric was treated in a steamer at 103C for one minute and then washed for 90 seconds at 50C. All rust spots were removed.
The moist fabric was treated in a steamer at 103C for one minute and then washed for 90 seconds at 50C. All rust spots were removed.
Claims (3)
OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. An aqueous formulation, based on reducing agents and complexing agents, for dissolving insoluble iron(III) compounds in aqueous textile treatment baths which are at a pH of 10 or more, which formulation has the following composition:
a) from 4 to 65% by weight of one or more water-soluble hydroxycarbonyl compound or of an N- or O-acetal thereof, as the reducing agent, b) from 10 to 80% by weight of one or more complexing agent which complexes Fe++ ions at a pH of 10 or more and c) water in an amount equal to 100% minus the amounts of a) and b).
a) from 4 to 65% by weight of one or more water-soluble hydroxycarbonyl compound or of an N- or O-acetal thereof, as the reducing agent, b) from 10 to 80% by weight of one or more complexing agent which complexes Fe++ ions at a pH of 10 or more and c) water in an amount equal to 100% minus the amounts of a) and b).
2. An agent as claimed in claim 1, wherein component a) is hydroxyacetone, glucose, sucrose or their N- or 0-. acetals and component b) is gluconic acid, sorbitol, hydroxyethanediphosphonic acid, triethanolamine or an adduct of a polyalkylenepolyamine with from 2 to 10 moles of ethylene oxide.
3. An aqueous treatment liquor, having a pH of 10 or more, which is used for textile goods consisting of or containing cellulose and contains (assuming a liquor ratio of 1:1), from 0.2 to 15% by weight, based on the liquor, of an agent as claimed in claim 1 or 2.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19823210004 DE3210004A1 (en) | 1982-03-19 | 1982-03-19 | AGENT FOR RESOLVING INSOLUBLE IRON (III) COMPOUNDS IN HIGH ALKALINE TEXTILE TREATMENT FLEETS |
| DEP3210004.3 | 1982-03-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1191658A true CA1191658A (en) | 1985-08-13 |
Family
ID=6158665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000423343A Expired CA1191658A (en) | 1982-03-19 | 1983-03-10 | Agent for dissolving insoluble iron(iii) compounds in highly alkaline textile treatment liquors |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4450083A (en) |
| EP (1) | EP0091564B1 (en) |
| JP (1) | JPS58169568A (en) |
| AT (1) | ATE18077T1 (en) |
| CA (1) | CA1191658A (en) |
| DE (2) | DE3210004A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19702734A1 (en) * | 1997-01-27 | 1998-07-30 | Basf Ag | Detergent and cleaning agent formulation with a bleaching system and a mixture of amines and complexing agents |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA489800A (en) * | 1953-01-20 | Ciba Limited | Process for removing metal oxides or metal salts from heavy metal surfaces and cleaning preparations therefor | |
| DE1042165B (en) * | 1955-10-26 | 1958-10-30 | Hascher & Keim | Stain removers |
| GB909596A (en) * | 1958-03-31 | 1962-10-31 | Pfister Chemical Works Inc | Composition and method for the sequestering of compounds of iron |
| US3183191A (en) * | 1960-04-19 | 1965-05-11 | Hach Chemical Co | Stain and rust removing composition |
| US3515673A (en) * | 1967-07-10 | 1970-06-02 | Progressive Products Co | Chelating and cleaning compound and method |
| US3666446A (en) * | 1969-11-12 | 1972-05-30 | Pyrites Co Inc The | Process for solvent extraction of metals |
| US3732171A (en) * | 1970-09-14 | 1973-05-08 | Morton Int Inc | Composition and method for iron removal |
| DE2057008C3 (en) * | 1970-11-20 | 1979-05-10 | Benckiser Gmbh Joh A | Agent for preventing stone-forming deposits in aqueous systems |
| JPS5227401A (en) * | 1975-08-28 | 1977-03-01 | Iil Kk | Detergent composition for bottle-washing |
| GB1563521A (en) * | 1977-01-10 | 1980-03-26 | Monsanto Europe Sa | Organophosphorus scale inhibitor compositions and their use in aqueous alkaline cleaning solutions |
| JPS6050231B2 (en) * | 1977-03-11 | 1985-11-07 | 花王株式会社 | Antistatic agent composition |
| DE2735816C3 (en) * | 1977-08-09 | 1981-08-13 | Basf Ag, 6700 Ludwigshafen | Process for desizing and bleaching textile goods |
| GB1591616A (en) * | 1978-03-06 | 1981-06-24 | Sandoz Products Ltd | Process for selectively decolourising dyed substrates |
| DE2851842A1 (en) * | 1978-11-30 | 1980-06-04 | Protex Manuf Prod Chimiq | Alkaline boiling and lyophilisation of cellulosic fibres - in presence of hydrazine phosphonate salt opt. with another cation |
| DE2935793A1 (en) * | 1979-09-05 | 1981-03-19 | Fried. Krupp Gmbh, 4300 Essen | Removal of ferric ions from organic solns. - by simultaneous treatment with reducing agent and displacing ions |
| JPS5713108A (en) * | 1980-06-26 | 1982-01-23 | Agency Of Ind Science & Technol | Method for separating trivalent iron from aqueous acidic solution |
-
1982
- 1982-03-19 DE DE19823210004 patent/DE3210004A1/en not_active Withdrawn
-
1983
- 1983-03-04 US US06/472,207 patent/US4450083A/en not_active Expired - Lifetime
- 1983-03-10 CA CA000423343A patent/CA1191658A/en not_active Expired
- 1983-03-11 EP EP83102402A patent/EP0091564B1/en not_active Expired
- 1983-03-11 AT AT83102402T patent/ATE18077T1/en active
- 1983-03-11 DE DE8383102402T patent/DE3362143D1/en not_active Expired
- 1983-03-16 JP JP58042465A patent/JPS58169568A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58169568A (en) | 1983-10-06 |
| ATE18077T1 (en) | 1986-03-15 |
| DE3210004A1 (en) | 1983-09-22 |
| JPH0231150B2 (en) | 1990-07-11 |
| US4450083A (en) | 1984-05-22 |
| EP0091564B1 (en) | 1986-02-19 |
| EP0091564A1 (en) | 1983-10-19 |
| DE3362143D1 (en) | 1986-03-27 |
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