BR0202777A - Processo para a preparação de alquilhidroxialquil-celulose - Google Patents

Processo para a preparação de alquilhidroxialquil-celulose

Info

Publication number
BR0202777A
BR0202777A BR0202777-1A BR0202777A BR0202777A BR 0202777 A BR0202777 A BR 0202777A BR 0202777 A BR0202777 A BR 0202777A BR 0202777 A BR0202777 A BR 0202777A
Authority
BR
Brazil
Prior art keywords
agu
cellulose
alkali hydroxide
equivalents
alkylation
Prior art date
Application number
BR0202777-1A
Other languages
English (en)
Inventor
Wolfgang Dannhorn
Erik-Andreas Klohr
Martin Kowollik
Hartwig Schlesiger
Joern-Bernd Pannek
Original Assignee
Wolff Walsrode 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 Wolff Walsrode Ag filed Critical Wolff Walsrode Ag
Publication of BR0202777A publication Critical patent/BR0202777A/pt

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B15/00—Preparation of other cellulose derivatives or modified cellulose, e.g. complexes
    • 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
    • C08B11/193—Mixed ethers, i.e. ethers with two or more different etherifying groups

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Biochemistry (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

"PROCESSO PARA A PREPARAçãO DE ALQUILHIDROXIALQUIL-CELULOSE". A presente invenção refere-se a um processo para a preparação de alquilhidroxialquilceluloses provenientes da reação de celulose em presença de álcali com agentes de alquilação e agentes de hidroxialquilação, caracterizado pelo fato de: a) alcalinizar a celulose com 0,9 até 2,9 equivalentes de hidróxido de metal alcalino I/AGU, empregado como solução aquosa, na presença de um agente de suspensão que contém pelo menos 0,2 equivalentes/agente de alquilação I AGU, b) reagir a celulose alcalinizada com agentes de alquilação e o agente de hidroxialquilação a uma temperatura superior a 65<198>C e c) adicionar, por sua vez, hidróxido de metal alcalino como solução aquosa e d) adicionar o agente de alquilação em uma quantidade pelo menos correspondente à diferença entre os já adicionados equivalentes de agente de alquilação 1 / AGU e o total dos equivalentes já adicionados de hidróxido de metal alcalino/AGU, sendo que nenhuma adição é feita no caso de a quantidade equivalente de agente de alquilação 1/AGU ultrapassar a quantidade total de equivalentes de hidróxido de metal alcalino/AGU e então e) Isolar a alquilhidroxialquilcelulose obtida da misturada reacional e, eventualmente, purificá-la.
BR0202777-1A 2001-07-20 2002-07-18 Processo para a preparação de alquilhidroxialquil-celulose BR0202777A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE10135464A DE10135464A1 (de) 2001-07-20 2001-07-20 Verfahren zur Herstellung von Alkylhydroxyalkylcellulose

Publications (1)

Publication Number Publication Date
BR0202777A true BR0202777A (pt) 2003-05-13

Family

ID=7692545

Family Applications (1)

Application Number Title Priority Date Filing Date
BR0202777-1A BR0202777A (pt) 2001-07-20 2002-07-18 Processo para a preparação de alquilhidroxialquil-celulose

Country Status (13)

Country Link
US (1) US7402668B2 (pt)
EP (1) EP1279680B1 (pt)
JP (1) JP4452776B2 (pt)
KR (1) KR100908751B1 (pt)
CN (1) CN1244596C (pt)
AT (1) ATE343598T1 (pt)
BR (1) BR0202777A (pt)
CA (1) CA2393920A1 (pt)
DE (2) DE10135464A1 (pt)
ES (1) ES2275783T3 (pt)
HK (1) HK1053663A1 (pt)
MX (1) MXPA02007129A (pt)
RU (1) RU2309162C2 (pt)

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KR100738017B1 (ko) * 2005-12-29 2007-07-16 삼성정밀화학 주식회사 시멘트용 히드록시알킬알킬셀룰로오스 제조방법
KR100738016B1 (ko) * 2005-12-29 2007-07-16 삼성정밀화학 주식회사 고수율의 히드록시알킬알킬셀룰로오스 제조방법
JP2009522394A (ja) * 2005-12-30 2009-06-11 サムスン ファイン ケミカルズ カンパニー リミテッド 高収率でヒドロキシアルキルアルキルセルロースエーテルを製造する方法
CN101003577B (zh) * 2006-01-20 2010-12-22 上海长光企业发展有限公司 一种高取代度聚阴离子纤维素生产工艺
US20080262216A1 (en) 2007-04-20 2008-10-23 Shin-Etsu Chemical Co., Ltd. Hydroxyalkyl methylcellulose having solubility and thermoreversible gelation properties improved
EP2058336A1 (de) * 2007-11-06 2009-05-13 Dow Wolff Cellulosics GmbH Ternäre Mischether
KR100950504B1 (ko) * 2008-02-11 2010-03-31 삼성정밀화학 주식회사 기포 발생이 억제된 경량 조인트 컴파운드용 첨가제 및그의 제조방법
EP2177538A1 (en) 2008-10-16 2010-04-21 Dow Global Technologies Inc. Cellulose ethers having little swelling and process for their production
US20120006233A1 (en) * 2009-03-12 2012-01-12 Samsung Fine Chemicals Co., Ltd. Admixture for cement mortar having crack resistance and cement mortar including the same
JP5806357B2 (ja) * 2009-12-15 2015-11-10 信越化学工業株式会社 高い熱ゲル化強度を有するヒドロキシプロピルメチルセルロース及びその製造方法
JP5588762B2 (ja) * 2009-12-15 2014-09-10 信越化学工業株式会社 高い熱ゲル強度を有するヒドロキシプロピルメチルセルロースを含む食品
US8968639B2 (en) 2010-04-26 2015-03-03 Dow Global Technologies Llc Composition for extrusion-molded bodies
JP5902696B2 (ja) * 2010-10-12 2016-04-13 ダウ グローバル テクノロジーズ エルエルシー 新規なセルロースエーテルおよびその使用
CN103261233B (zh) * 2010-10-12 2016-05-25 陶氏环球技术有限责任公司 新的纤维素醚以及它们的用途
US9353011B2 (en) 2010-11-08 2016-05-31 Dow Global Technologies Llc Composition for extrusion-molded bodies comprising a methyl cellulose
KR101749620B1 (ko) * 2010-12-06 2017-07-03 롯데정밀화학 주식회사 아세틸화 셀룰로오스 에테르 및 이를 포함하는 물품
WO2012173838A1 (en) * 2011-06-14 2012-12-20 Dow Global Technologies Llc Food composition comprising a cellulose ether
KR20150091081A (ko) * 2012-12-06 2015-08-07 카오카부시키가이샤 히드록시알킬 셀룰로오스의 제조 방법
US10370459B2 (en) 2013-03-15 2019-08-06 Hercules Llc Alkyl hydroxyalkyl cellulose ethers, methods of making, and use in cements and mortars
WO2015076874A2 (en) * 2013-11-25 2015-05-28 Hercules Incorporated Improved alkyl hydroxyalkyl cellulose ethers, methods of making, and use in cements and mortars
EP2998340B1 (en) * 2014-09-22 2019-07-17 Shin-Etsu Chemical Co., Ltd. Method for continuously producing cellulose ether
EP3216463B1 (en) * 2016-03-09 2020-12-23 Shin-Etsu Chemical Co., Ltd. Solid preparation containing alkyl cellulose and method for producing the same
CN106967397B (zh) * 2017-03-23 2019-11-08 中国石油大学(华东) 一种适用于油井水泥浆的热增黏沉降稳定剂及制备方法与应用
US10723807B2 (en) 2017-03-31 2020-07-28 Shin-Etsu Chemical Co., Ltd. Method for producing hydroxyalkyl alkyl cellulose
KR102236643B1 (ko) * 2020-07-20 2021-04-07 주식회사 피앤씨랩스 고흡수성 셀룰로오스 부직포 제조방법

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US5493013A (en) 1992-04-23 1996-02-20 Hoechst Aktiengesellschaft Process for preparing cellulose ethers with cyclic ethers as suspending agents
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JP4010345B2 (ja) * 1996-11-28 2007-11-21 信越化学工業株式会社 ヒドロキシプロピルメチルセルロースの製造方法
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Also Published As

Publication number Publication date
MXPA02007129A (es) 2005-02-17
CA2393920A1 (en) 2003-01-20
DE50208522D1 (de) 2006-12-07
ATE343598T1 (de) 2006-11-15
CN1244596C (zh) 2006-03-08
JP2003096102A (ja) 2003-04-03
KR20030009219A (ko) 2003-01-29
US20030065165A1 (en) 2003-04-03
ES2275783T3 (es) 2007-06-16
EP1279680B1 (de) 2006-10-25
RU2002119196A (ru) 2004-02-20
RU2309162C2 (ru) 2007-10-27
JP4452776B2 (ja) 2010-04-21
US7402668B2 (en) 2008-07-22
EP1279680A2 (de) 2003-01-29
HK1053663A1 (en) 2003-10-31
KR100908751B1 (ko) 2009-08-12
DE10135464A1 (de) 2003-02-06
EP1279680A3 (de) 2003-03-12
CN1398900A (zh) 2003-02-26

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Legal Events

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B25D Requested change of name of applicant approved

Owner name: DOW WOLFF CELLULOSICS GMBH (DE)

Free format text: ALTERADO DE: WOLFF WALSRODE AG

B25G Requested change of headquarter approved

Owner name: DOW WOLFF CELLULOSICS GMBH (DE)

Free format text: SEDE ALTERADA CONFORME SOLICITADO NA PETICAO NO 020080121567/RJ DE 18/09/2008.

B06F Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]

Free format text: EM CONSONANCIA COM A RESOLUCAO NO 34 DO CGEN.

B11E Dismissal acc. art. 34 of ipl - requirements for examination incomplete
B11T Dismissal of application maintained [chapter 11.20 patent gazette]