DE69407818T2 - Reinigungsverfahren - Google Patents

Reinigungsverfahren

Info

Publication number
DE69407818T2
DE69407818T2 DE69407818T DE69407818T DE69407818T2 DE 69407818 T2 DE69407818 T2 DE 69407818T2 DE 69407818 T DE69407818 T DE 69407818T DE 69407818 T DE69407818 T DE 69407818T DE 69407818 T2 DE69407818 T2 DE 69407818T2
Authority
DE
Germany
Prior art keywords
cleaning procedure
cleaning
procedure
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 - Lifetime
Application number
DE69407818T
Other languages
English (en)
Other versions
DE69407818D1 (de
Inventor
Ronald Egres
Clay W Jones
John Kline
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Application granted granted Critical
Publication of DE69407818D1 publication Critical patent/DE69407818D1/de
Publication of DE69407818T2 publication Critical patent/DE69407818T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F6/00—Post-polymerisation treatments
    • C08F6/001—Removal of residual monomers by physical means
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F6/00—Post-polymerisation treatments
    • C08F6/02—Neutralisation of the polymerisation mass, e.g. killing the catalyst also removal of catalyst residues
DE69407818T 1993-11-17 1994-11-14 Reinigungsverfahren Expired - Lifetime DE69407818T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/154,218 US5391709A (en) 1993-11-17 1993-11-17 Purification process of PTFE using fiber bed and heated air
PCT/US1994/013055 WO1995014047A1 (en) 1993-11-17 1994-11-14 Purification process

Publications (2)

Publication Number Publication Date
DE69407818D1 DE69407818D1 (de) 1998-02-12
DE69407818T2 true DE69407818T2 (de) 1998-08-13

Family

ID=22550484

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69407818T Expired - Lifetime DE69407818T2 (de) 1993-11-17 1994-11-14 Reinigungsverfahren

Country Status (5)

Country Link
US (1) US5391709A (de)
EP (1) EP0729479B1 (de)
JP (1) JP3621103B2 (de)
DE (1) DE69407818T2 (de)
WO (1) WO1995014047A1 (de)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6177533B1 (en) 1998-11-13 2001-01-23 E. I. Du Pont De Nemours And Company Polytetrafluoroethylene resin
US6136933A (en) * 1998-11-13 2000-10-24 E. I. Du Pont De Nemours And Company Process for polymerizing tetrafluoroethylene
US6720360B1 (en) * 2000-02-01 2004-04-13 3M Innovative Properties Company Ultra-clean fluoropolymers
US6720437B2 (en) 2001-02-07 2004-04-13 E. I. Du Pont De Nemours And Company Fluorinated carboxylic acid recovery and reuse
ITMI20011615A1 (it) * 2001-07-26 2003-01-26 Ausimont Spa Processo di ottenimento di p0lveri fini non termoprocessabili di ptfeomopolimero o ptfe modificato
EP1567563B1 (de) * 2002-11-08 2007-06-27 E.I. du Pont de Nemours and Company Umsetzung von fluorpolymerschmelzen
US6838545B2 (en) * 2002-11-08 2005-01-04 E. I. Du Pont De Nemours And Company Reaction of fluoropolymer melts
EP1889855B1 (de) * 2005-05-02 2010-04-14 Daikin Industries, Ltd. Verfahren zur herstellung von fluorhaltigem polymer
ITMI20051397A1 (it) * 2005-07-21 2007-01-22 Solvay Solexis Spa Polveri fini di fluoropolimeri
DE602008006245D1 (de) * 2007-10-22 2011-05-26 Solvay Solexis Spa Verfahren zur herstellung getrockneter feinpulver aus schmelzverarbeitbaren oder nicht-schmelzverarbeitbaren tfe-(co)polymeren
KR101413864B1 (ko) * 2009-10-30 2014-06-30 가부시끼가이샤 구레하 열처리가 끝난 불화 비닐리덴계 중합체 분말의 제조 방법 및 불화 비닐리덴계 중합체 용액의 제조 방법
US20130303709A1 (en) 2012-05-09 2013-11-14 E I Du Pont De Nemours And Company Fluoropolymer Dispersion Treatment Employing High pH and Oxygen Source to Reduce Fluoropolymer Resin Discoloration
WO2013169581A1 (en) 2012-05-09 2013-11-14 E. I. Du Pont De Nemours And Company Fluoropolymer resin treatment employing oxidizing agent to reduce discoloration
US20130303708A1 (en) 2012-05-09 2013-11-14 E I Du Pont De Nemours And Company Fluoropolymer Dispersion Treatment Employing Hypochlorite Salts or Nitrite Salts to Reduce Fluoropolymer Resin Discoloration
US8785560B2 (en) 2012-05-09 2014-07-22 E I Du Pont De Nemours And Company Employing pretreatment and fluorination of fluoropolymer resin to reduce discoloration
US9175110B2 (en) 2012-05-09 2015-11-03 The Chemours Company Fc, Llc Fluoropolymer resin treatment employing melt extrusion and exposure to oxygen source to reduce discoloration
US8785516B2 (en) 2012-05-09 2014-07-22 E I Du Pont De Nemours And Company Fluoropolymer dispersion treatment employing ultraviolet light and oxygen source to reduce fluoropolymer resin discoloration
US20130303718A1 (en) 2012-05-09 2013-11-14 E I Du Pont De Nemours And Company Fluoropolymer Dispersion Treatment Employing Oxidizing Agent to Reduce Fluoropolymer Resin Discoloration
US9175112B2 (en) 2012-05-09 2015-11-03 The Chemours Company Fc, Llc Drying wet fluoropolymer resin and exposing to oxygen source to reduce discoloration
US9175115B2 (en) 2012-05-09 2015-11-03 The Chemours Company Fc, Llc Fluoropolymer resin treatment employing heating and oxygen source to reduce discoloration
US20130303652A1 (en) 2012-05-09 2013-11-14 E I Du Pont De Nemours And Company Fluoropolymer Dispersion Treatment Employing Light and Oxygen Source in Presence of Photocatalyst to Reduce Fluoropolymer Resin Discoloration
US9574027B2 (en) 2013-03-11 2017-02-21 The Chemours Company Fc, Llc Fluoropolymer resin treatment employing sorbent to reduce fluoropolymer resin discoloration
US11851519B2 (en) * 2017-08-10 2023-12-26 Daikin Industries, Ltd. Method for producing purified polytetrafluoroethylene aqueous dispersion liquid, method for producing modified polytetrafluoroethylene powder, method for producing polytetrafluoroethylene molded body, and composition

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3464964A (en) * 1966-06-13 1969-09-02 Pennsalt Chemicals Corp Coagulation of polytetrafluoroethylene latex
DE2632054C3 (de) * 1976-07-16 1982-05-27 Hoechst Ag, 6000 Frankfurt Verfahren zur Trocknung von chloriertem Polyäthylen
GB2049899B (en) * 1979-05-01 1983-03-30 Ici Ltd Process for drying vinyl chloride polymer wet cake and drier therefor
US4730035A (en) * 1986-09-04 1988-03-08 The Dow Chemical Company Drying and removing residual acid from halogenated polymer resins

Also Published As

Publication number Publication date
EP0729479A1 (de) 1996-09-04
JPH09505343A (ja) 1997-05-27
WO1995014047A1 (en) 1995-05-26
DE69407818D1 (de) 1998-02-12
US5391709A (en) 1995-02-21
EP0729479B1 (de) 1998-01-07
JP3621103B2 (ja) 2005-02-16

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition