ES2101787T3 - Procedimiento para el tratamiento purificador de medios de reaccion y/o lavado que resultan en la preparacion de eteres de celulosa. - Google Patents

Procedimiento para el tratamiento purificador de medios de reaccion y/o lavado que resultan en la preparacion de eteres de celulosa.

Info

Publication number
ES2101787T3
ES2101787T3 ES92120720T ES92120720T ES2101787T3 ES 2101787 T3 ES2101787 T3 ES 2101787T3 ES 92120720 T ES92120720 T ES 92120720T ES 92120720 T ES92120720 T ES 92120720T ES 2101787 T3 ES2101787 T3 ES 2101787T3
Authority
ES
Spain
Prior art keywords
cellulose
reaction
procedure
eters
preparation
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
ES92120720T
Other languages
English (en)
Inventor
Heinz Wallisch
Reinhard Dr Donges
Ulrich Dr Meyer-Blumenroth
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.)
Hoechst AG
Original Assignee
Hoechst AG
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 Hoechst AG filed Critical Hoechst AG
Application granted granted Critical
Publication of ES2101787T3 publication Critical patent/ES2101787T3/es
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
    • C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B11/00—Preparation of cellulose ethers
    • C08B11/20—Post-etherification treatments of chemical or physical type, e.g. mixed etherification in two steps, including purification

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biochemistry (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)

Abstract

LA INVENCION CONCIERNE A UN PROCEDIMIENTO PARA EL TRATAMIENTO DEPURADOR DE LOS MEDIOS LIQUIDOS DE REACCION Y/O DE LAVADO, PRODUCIDOS DURANTE LA OBTENCION DE ETERES DE CELULOSA INSOLUBLES EN AGUA CALIENTE, A PARTIR DE CELULOSA, HIDROXIDO ALCALINO Y AL MENOS UN AGENTE DE ETERIFICACION EN UN AGUA, Y EN TODO CASO AL MENOS UN MEDIO CONTENIENDO UN DISOLVENTE ORGANICO, POR MEDIO DE LA ULTRAFILTRACION EN UN PERMEATO Y CONCENTRADO, QUE SE CARACTERIZA PORQUE LA ULTRAFILTRACION DE LOS AGENTES DE REACCION Y/O LAVADO SE REALIZA A UNA TEMPERATURA DE O POR ENCIMA DE LA TEMPERATURA DE FLOCULACION DEL ETER DE CELULOSA.
ES92120720T 1991-12-06 1992-12-04 Procedimiento para el tratamiento purificador de medios de reaccion y/o lavado que resultan en la preparacion de eteres de celulosa. Expired - Lifetime ES2101787T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4140272 1991-12-06

Publications (1)

Publication Number Publication Date
ES2101787T3 true ES2101787T3 (es) 1997-07-16

Family

ID=6446448

Family Applications (1)

Application Number Title Priority Date Filing Date
ES92120720T Expired - Lifetime ES2101787T3 (es) 1991-12-06 1992-12-04 Procedimiento para el tratamiento purificador de medios de reaccion y/o lavado que resultan en la preparacion de eteres de celulosa.

Country Status (7)

Country Link
US (1) US5500124A (es)
EP (1) EP0545426B1 (es)
CA (1) CA2084589A1 (es)
DE (1) DE59208547D1 (es)
ES (1) ES2101787T3 (es)
FI (1) FI925499A (es)
MX (1) MX9207037A (es)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9312219D0 (en) * 1993-06-14 1993-07-28 Dow Deutschland Inc Purification of aqueous reaction or washing medium containing cellulose ethers
US5504201A (en) * 1994-03-14 1996-04-02 The Dow Chemical Company Process for recovering salable cellulose ethers from an aqueous medium containing such cellulose ethers
IT1295832B1 (it) * 1997-10-28 1999-05-28 Proras Srl Processo e impianto per l'estrazione e concentrazione del tannino da legno e altri prodotti naturali
DE19941893A1 (de) * 1999-09-03 2001-03-08 Clariant Gmbh Niederviskose, heisswasser-flockbare Celluloseether, Verfahren zu deren Herstellung durch Depolymerisation sowie deren Verwendung
ATE336515T1 (de) * 2001-02-28 2006-09-15 Hercules Inc Verfahren zum abtrennen von celluloseether aus wässrigen lösungen mittels ultrafiltration mit verstärkter sherwirkung
JP4029272B2 (ja) * 2002-03-11 2008-01-09 信越化学工業株式会社 混和剤及びこれを用いた押出成形用水硬性組成物
EP1652860B1 (en) * 2004-11-02 2008-10-15 Shin-Etsu Chemical Co., Ltd. Method of separating water-soluble cellulose ether
DE102006042438A1 (de) * 2006-09-09 2008-03-27 Wolff Cellulosics Gmbh & Co. Kg Verfahren zur Wäsche von Polysaccharidderivaten

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3873518A (en) * 1973-12-14 1975-03-25 Dow Chemical Co Water soluble ternary cellulose ethers
FR2351063A1 (fr) * 1976-05-12 1977-12-09 Rhone Poulenc Ind Traitement d'effluents de papeteries
JPS5768190A (en) * 1980-10-13 1982-04-26 Shin Etsu Chem Co Ltd Treatment of nonionic cellulose ether dissolved waste water
DE3331997A1 (de) * 1983-09-05 1985-03-21 Hoechst Ag, 6230 Frankfurt Verfahren zur reinigung von waessrigen destillationsrueckstaenden waehrend der aufbereitung von bei der herstellung von celluloseethern anfallenden fluessigkeiten
US4581446A (en) * 1985-03-15 1986-04-08 The Dow Chemical Company Purification of cellulose ethers
US4830753A (en) * 1986-04-28 1989-05-16 Rohm And Haas Company Membrane filtration of cell culture media with charged particles
JPS6363274A (ja) * 1986-09-03 1988-03-19 Konica Corp 読取装置
US4988807A (en) * 1989-01-23 1991-01-29 The Dow Chemical Company Removal of undesirable material from water-soluble polysaccharide ethers
US5218107A (en) * 1991-12-30 1993-06-08 The Dow Chemical Company Removal of undesirable material from water-soluble cellulose ether aqueous solutions

Also Published As

Publication number Publication date
CA2084589A1 (en) 1993-06-07
EP0545426B1 (de) 1997-05-28
FI925499A (fi) 1993-06-07
MX9207037A (es) 1993-06-01
FI925499A0 (fi) 1992-12-03
US5500124A (en) 1996-03-19
EP0545426A2 (de) 1993-06-09
EP0545426A3 (en) 1993-07-14
DE59208547D1 (de) 1997-07-03

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