CA2479614A1 - Slow release nitrogen fertilizer - Google Patents

Slow release nitrogen fertilizer Download PDF

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Publication number
CA2479614A1
CA2479614A1 CA002479614A CA2479614A CA2479614A1 CA 2479614 A1 CA2479614 A1 CA 2479614A1 CA 002479614 A CA002479614 A CA 002479614A CA 2479614 A CA2479614 A CA 2479614A CA 2479614 A1 CA2479614 A1 CA 2479614A1
Authority
CA
Canada
Prior art keywords
urea
formaldehyde
aqueous
particulate
formaldehyde polymer
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.)
Granted
Application number
CA002479614A
Other languages
French (fr)
Other versions
CA2479614C (en
Inventor
Stacey Wertz
Kurt Gabrielson
James Wright
Paul Baxter
James Knight
Charles Russell Davis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koch Agronomic Services LLC
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2479614A1 publication Critical patent/CA2479614A1/en
Application granted granted Critical
Publication of CA2479614C publication Critical patent/CA2479614C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01C—PLANTING; SOWING; FERTILISING
    • A01C1/00—Apparatus, or methods of use thereof, for testing or treating seed, roots, or the like, prior to sowing or planting
    • A01C1/06—Coating or dressing seed
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05C—NITROGENOUS FERTILISERS
    • C05C9/00—Fertilisers containing urea or urea compounds
    • C05C9/02—Fertilisers containing urea or urea compounds containing urea-formaldehyde condensates
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G5/00—Fertilisers characterised by their form
    • C05G5/20—Liquid fertilisers
    • C05G5/27—Dispersions, e.g. suspensions or emulsions
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G5/00—Fertilisers characterised by their form
    • C05G5/30—Layered or coated, e.g. dust-preventing coatings
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G5/00—Fertilisers characterised by their form
    • C05G5/30—Layered or coated, e.g. dust-preventing coatings
    • C05G5/37—Layered or coated, e.g. dust-preventing coatings layered or coated with a polymer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
    • Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
    • Y02P60/21—Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S47/00—Plant husbandry
    • Y10S47/09—Physical and chemical treatment of seeds for planting

Abstract

A slow release, particulate urea-formaldehyde polymer useful as a fertilizer for enhancing the extended delivery of nitrogen needed for plant development and growth and a granular fertilizer made with the particulate urea formaldehyde polymer.

Claims (12)

1. A particulate urea-formaldehyde polymer made by acidifying a aqueous methylol urea solution, wherein the aqueous methylol urea solution either contains a dispersing agent or is subjected to a high shear condition during the acidifying, to form an aqueous dispersion of insoluble urea-formaldehyde polymer particles and drying the dispersion to recover the urea-formaldehyde polymer particles.
2. The particulate urea-formaldehyde polymer of claim 1 wherein the aqueous methylol urea solution is made by reacting urea and formaldehyde at a urea:formaldehyde mole ratio of approximately 1:1.
3. The particulate urea-formaldehyde polymer of claim 1 wherein the aqueous methylol urea solution is made by reacting urea and formaldehyde at a urea:formaldehyde mole ratio of approximately 1:1 and wherein the methylol urea solution contains a dispersing agent during the acidifying.
4. The particulate urea-formaldehyde polymer of claim 2 wherein the aqueous methylol urea solution is made by reacting urea and formaldehyde at a urea:formaldehyde mole ratio of 0.83:1 to 1.1:1.
5. The particulate urea-formaldehyde polymer of claim 3 wherein the aqueous methylol urea solution is made by reacting urea and formaldehyde at a urea:formaldehyde mole ratio of 0.83:1 to 1.1:1.
6. The particulate urea-formaldehyde polymer of claim 1 wherein the aqueous methylol urea solution is made by reacting urea and formaldehyde at a urea:formaldehyde mole ratio of 0.95:1 to 1.05:1 and wherein the methylol urea solution contains a dispersing agent during the acidifying.
7. The particulate urea-formaldehyde polymer of claim 1 wherein the aqueous methylol urea solution is made by reacting urea and formaldehyde at a urea:formaldehyde mole ratio of 0.95:1 to 1.05:1.
8. The particulate urea-formaldehyde polymer of claim 1, 2, 3, 4, 5, 6, or 7 wherein the aqueous dispersion of urea-formaldehyde polymer particles is dried by spray drying.
9. A granular fertilizer made by granulating the particulate urea-formaldehyde polymer of claim 8 with a fertilizer-enhancing solid and a binder.
10. The granular fertilizer of claim 9 wherein said fertilizer-enhancing solid is selected from the group consisting of calcium carbonate; gypsum;
metal silicates; metal chelates of a metal selected from iron, zinc and manganese; talc; elemental sulfur; activated carbon; pesticides; herbicides;
fungicides; super absorbent polymers; wicking agents; wetting agents; plant stimulants; urea; a potassium source and a phosphorus source.
11. A method of producing a particulate urea-formaldehyde polymer comprising forming an aqueous solution of methylol urea by reacting urea and formaldehyde at a urea:formaldehyde mole ratio of 0.95:1 to 1.05:1; acidifying the aqueous methylol urea solution, wherein the aqueous methylol urea solution either contains a dispersing agent or is subjected to a high shear condition during the acidifying, to form an aqueous dispersion of insoluble urea-formaldehyde polymer particles and drying the dispersion to recover the urea-formaldehyde polymer particles.
12. The method of claim 11 wherein the wherein the methylol urea solution contains a dispersing agent during the acidifying and the aqueous dispersion of urea-formaldehyde polymer particles is dried by spray drying.
CA2479614A 2002-03-26 2003-03-26 Slow release nitrogen fertilizer Expired - Fee Related CA2479614C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US36727802P 2002-03-26 2002-03-26
US60/367,278 2002-03-26
US37940202P 2002-05-13 2002-05-13
US60/379,402 2002-05-13
PCT/US2003/008454 WO2003082005A2 (en) 2002-03-26 2003-03-26 Slow release nitrogen fertilizer

Publications (2)

Publication Number Publication Date
CA2479614A1 true CA2479614A1 (en) 2003-10-08
CA2479614C CA2479614C (en) 2011-11-15

Family

ID=28678183

Family Applications (2)

Application Number Title Priority Date Filing Date
CA2480173A Expired - Fee Related CA2480173C (en) 2002-03-26 2003-03-26 Slow release nitrogen seed coat
CA2479614A Expired - Fee Related CA2479614C (en) 2002-03-26 2003-03-26 Slow release nitrogen fertilizer

Family Applications Before (1)

Application Number Title Priority Date Filing Date
CA2480173A Expired - Fee Related CA2480173C (en) 2002-03-26 2003-03-26 Slow release nitrogen seed coat

Country Status (12)

Country Link
US (4) US7213367B2 (en)
EP (3) EP2839734A3 (en)
JP (2) JP4456875B2 (en)
KR (2) KR101002884B1 (en)
CN (1) CN1309685C (en)
AU (4) AU2003224717B2 (en)
BR (2) BR0308607B1 (en)
CA (2) CA2480173C (en)
ES (1) ES2450130T3 (en)
HK (1) HK1080446B (en)
MX (2) MXPA04009282A (en)
WO (4) WO2003082003A2 (en)

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