ES2194520T3 - Procedimiento y aparato para fabricar eteres de celulosa. - Google Patents

Procedimiento y aparato para fabricar eteres de celulosa.

Info

Publication number
ES2194520T3
ES2194520T3 ES99953103T ES99953103T ES2194520T3 ES 2194520 T3 ES2194520 T3 ES 2194520T3 ES 99953103 T ES99953103 T ES 99953103T ES 99953103 T ES99953103 T ES 99953103T ES 2194520 T3 ES2194520 T3 ES 2194520T3
Authority
ES
Spain
Prior art keywords
cellulose ether
cellulose
temperature
reactor
partially
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
ES99953103T
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English (en)
Inventor
Gary J Schulz
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.)
Dow Global Technologies LLC
Original Assignee
Dow Global Technologies LLC
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=22753504&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=ES2194520(T3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Dow Global Technologies LLC filed Critical Dow Global Technologies LLC
Application granted granted Critical
Publication of ES2194520T3 publication Critical patent/ES2194520T3/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
    • C08B17/00—Apparatus for esterification or etherification of cellulose
    • C08B17/06—Apparatus for esterification or etherification of cellulose for making cellulose ethers
    • 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)
  • Polysaccharides And Polysaccharide Derivatives (AREA)

Abstract

Un procedimiento para la preparación de un éter de celulosa, que comprende: a) alcalinizar una pasta de celulosa; b) eterificar la pasta de celulosa alcalinizada para formar un éter de celulosa; c) lavar el éter de celulosa; d) secar el éter de celulosa a un contenido de humedad reducido; e) triturar el éter de celulosa para obtener una forma de partículas; f) ajustar la temperatura del éter de celulosa en partículas a un valor de 50°C a 130°C; revolver continuamente el éter de celulosa en partículas en un reactor, haciéndose girar el reactor axialmente o de extremo a extremo en una estufa o en una cámara o espacio con temperatura controlada mientras que se pone en contacto simultáneamente el éter de celulosa con un ácido para despolimerizar parcialmente el éter de celulosa de tal manera que una solución acuosa al dos por ciento del mismo presente una viscosidad de 200 centipoises (cP) o menor a una temperatura de 20°C; y h) neutralizar parcial o sustancialmente el ácido poniéndolo en contacto con un compuesto básico.
ES99953103T 1998-12-01 1999-10-07 Procedimiento y aparato para fabricar eteres de celulosa. Expired - Lifetime ES2194520T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US09/203,324 US6261218B1 (en) 1998-12-01 1998-12-01 Process and apparatus for making low molecular weight cellulose ethers

Publications (1)

Publication Number Publication Date
ES2194520T3 true ES2194520T3 (es) 2003-11-16

Family

ID=22753504

Family Applications (1)

Application Number Title Priority Date Filing Date
ES99953103T Expired - Lifetime ES2194520T3 (es) 1998-12-01 1999-10-07 Procedimiento y aparato para fabricar eteres de celulosa.

Country Status (9)

Country Link
US (1) US6261218B1 (es)
EP (1) EP1141029B1 (es)
JP (1) JP5117646B2 (es)
AR (1) AR021436A1 (es)
AT (1) ATE241647T1 (es)
AU (1) AU6511799A (es)
DE (1) DE69908416T2 (es)
ES (1) ES2194520T3 (es)
WO (1) WO2000032637A1 (es)

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Also Published As

Publication number Publication date
WO2000032637A1 (en) 2000-06-08
JP2002531594A (ja) 2002-09-24
DE69908416T2 (de) 2004-04-01
US6261218B1 (en) 2001-07-17
ATE241647T1 (de) 2003-06-15
DE69908416D1 (de) 2003-07-03
EP1141029A1 (en) 2001-10-10
AR021436A1 (es) 2002-07-17
EP1141029B1 (en) 2003-05-28
AU6511799A (en) 2000-06-19
US20010007028A1 (en) 2001-07-05
JP5117646B2 (ja) 2013-01-16

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