BE855674A - Procede de reduction de la viscosite de derives cellulosiques - Google Patents

Procede de reduction de la viscosite de derives cellulosiques

Info

Publication number
BE855674A
BE855674A BE178434A BE178434A BE855674A BE 855674 A BE855674 A BE 855674A BE 178434 A BE178434 A BE 178434A BE 178434 A BE178434 A BE 178434A BE 855674 A BE855674 A BE 855674A
Authority
BE
Belgium
Prior art keywords
viscosity
reducing
cellulosic derivatives
cellulosic
derivatives
Prior art date
Application number
BE178434A
Other languages
English (en)
Original Assignee
Dow Chemical 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 Dow Chemical Co filed Critical Dow Chemical Co
Publication of BE855674A publication Critical patent/BE855674A/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B3/00—Preparation of cellulose esters of organic acids
    • C08B3/22—Post-esterification treatments, including purification
    • C08B3/24—Hydrolysis or ripening
    • 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)
BE178434A 1976-06-14 1977-06-14 Procede de reduction de la viscosite de derives cellulosiques BE855674A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/695,876 US4061859A (en) 1976-06-14 1976-06-14 Viscosity reduction of cellulose derivatives

Publications (1)

Publication Number Publication Date
BE855674A true BE855674A (fr) 1977-12-14

Family

ID=24794800

Family Applications (1)

Application Number Title Priority Date Filing Date
BE178434A BE855674A (fr) 1976-06-14 1977-06-14 Procede de reduction de la viscosite de derives cellulosiques

Country Status (8)

Country Link
US (1) US4061859A (fr)
JP (1) JPS609041B2 (fr)
BE (1) BE855674A (fr)
BR (1) BR7703824A (fr)
CA (1) CA1065312A (fr)
DE (1) DE2726780C2 (fr)
GB (1) GB1578575A (fr)
NL (1) NL7706458A (fr)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4200737A (en) * 1978-05-17 1980-04-29 International Playtex, Inc. Preparation of water-insoluble carboxymethyl cellulose absorbents
USRE31323E (en) * 1978-05-17 1983-07-26 International Playtex, Inc. Preparation of water-insoluble carboxymethyl cellulose absorbents
DE2917104A1 (de) * 1979-04-27 1980-11-06 Hoechst Ag Verfahren zur viskositaetserniedrigung von celluloseethern durch ozon und seine verwendung
JPS6225101A (ja) * 1985-07-24 1987-02-03 Shin Etsu Chem Co Ltd 低重合度セルロ−スエ−テルの製造方法
DE3530857A1 (de) * 1985-08-29 1987-03-05 Hoechst Ag Verfahren zur herstellung von niedrigviskosen celluloseethern
US6000928A (en) * 1997-04-03 1999-12-14 Technophar Equipment & Service Limited Capsule making machine having improved pin bars and air flow characteristics
US5945136A (en) * 1997-04-03 1999-08-31 Technophar Equipment & Service Limited Heating elevator for capsule making machine
US6261218B1 (en) * 1998-12-01 2001-07-17 The Dow Chemical Company Process and apparatus for making low molecular weight cellulose ethers
US6306333B1 (en) * 1999-06-24 2001-10-23 The Dow Chemical Company Process for making cellulose ethers having reduced yellowing and discoloration
DE19941893A1 (de) * 1999-09-03 2001-03-08 Clariant Gmbh Niederviskose, heisswasser-flockbare Celluloseether, Verfahren zu deren Herstellung durch Depolymerisation sowie deren Verwendung
JP4380069B2 (ja) * 2001-02-08 2009-12-09 コニカミノルタホールディングス株式会社 感熱転写記録材料、感熱転写記録方法、インク、トナー及びカラーフィルター
US6488091B1 (en) * 2001-06-11 2002-12-03 Halliburton Energy Services, Inc. Subterranean formation treating fluid concentrates, treating fluids and methods
US7001872B2 (en) * 2001-06-11 2006-02-21 Halliburton Energy Services, Inc. Subterranean formation treating fluid and methods of fracturing subterranean formations
US20050137094A1 (en) * 2001-06-11 2005-06-23 Halliburton Energy Sevices, Inc. Subterranean formation treatment fluids and methods of using such fluids
DE10141680B4 (de) 2001-08-25 2004-02-26 Clariant Gmbh Verfahren zur Herstellung niederviskoser Celluloseether durch sauer-oxidativen Abbau von gemahlenen und getrockneten Celluloseethern
KR100461565B1 (ko) * 2001-09-22 2004-12-14 삼성정밀화학 주식회사 저점도 히드록시프로필메틸 셀룰로오스의 제조방법
US8865432B2 (en) * 2004-02-26 2014-10-21 Shin-Etsu Chemical Co., Ltd. Method for preparing cellulose derivatives having solubility improved
WO2005118649A1 (fr) * 2004-05-26 2005-12-15 Dow Global Technologies Inc. Production d'ethylcellulose a faible poids moleculaire
MX2008015896A (es) * 2006-06-14 2009-01-12 Dow Global Technologies Inc Proceso para reducir el peso molecular promedio de eteres de celulosa.
US9174879B2 (en) * 2007-11-30 2015-11-03 Corning Incorporated Ceramic precursor batch composition and method of increasing ceramic precursor batch extrusion rate
KR102220604B1 (ko) * 2012-07-17 2021-03-02 다우 글로벌 테크놀로지스 엘엘씨 유기 액체 희석제 및 매우 낮은 점도의 셀룰로즈 에테르를 포함하는 조성물
KR101960546B1 (ko) * 2012-12-07 2019-03-21 롯데정밀화학 주식회사 셀룰로오스 에테르의 점도 경시변화 방지방법
KR101586136B1 (ko) 2013-01-09 2016-01-15 신에쓰 가가꾸 고교 가부시끼가이샤 저중합도 셀룰로오스에테르의 제조 방법 및 이에 따라 제조된 셀룰로오스에테르
US9926385B2 (en) 2013-08-12 2018-03-27 Shin-Etsu Chemical Co., Ltd. Method for producing water-soluble cellulose ether having low degree of polymerization and method for producing film coating composition comprising same
KR102373750B1 (ko) 2016-10-06 2022-03-15 신에쓰 가가꾸 고교 가부시끼가이샤 저중합도 셀룰로오스 에테르의 제조 방법
CN113501971B (zh) * 2021-07-06 2024-02-23 湖州展望天明药业有限公司 一种低聚合度水溶性纤维素醚制造方法

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1600159A (en) * 1924-08-15 1926-09-14 Zdanowich Joe Olgierd Making cellulose acetate directly spinnable from reaction mixtures in commercial form
US1864554A (en) * 1928-06-06 1932-06-28 Du Pont Process for reducing the viscosity of cellulose ethers
US1946645A (en) * 1929-06-24 1934-02-13 Eastman Kodak Co Method for the production of low viscosity cellulose derivatives
US1878988A (en) * 1929-07-15 1932-09-20 Eastman Kodak Co Process for the manufacture of cellulose acetate
US1904406A (en) * 1930-07-02 1933-04-18 Du Pont Method of reducing the solution viscosity of cellulose
US2159377A (en) * 1938-07-19 1939-05-23 Dow Chemical Co Making low viscosity cellulose ethers
US2553725A (en) * 1948-09-10 1951-05-22 Buckeye Cotton Oil Company Process of preparing cellulose derivatives
JPS4841037B1 (fr) * 1964-10-26 1973-12-04
DE1543116A1 (de) * 1965-05-29 1969-07-31 Kalle Ag Verfahren zur Herstellung niedrigviskoser wasserloeslicher Celluloseaether
US3549617A (en) * 1968-03-13 1970-12-22 Du Pont Brightening water-soluble cellulose derivatives
GB1249814A (en) * 1968-06-13 1971-10-13 Dow Chemical Co Improved process for depolymerizing cellulose ethers
US3728331A (en) * 1969-04-04 1973-04-17 Dow Chemical Co Process for reducing the viscosity of a cellulose ether with hydrogen peroxide

Also Published As

Publication number Publication date
DE2726780A1 (de) 1977-12-15
BR7703824A (pt) 1978-04-18
GB1578575A (en) 1980-11-05
DE2726780C2 (de) 1983-03-03
US4061859A (en) 1977-12-06
JPS609041B2 (ja) 1985-03-07
CA1065312A (fr) 1979-10-30
JPS52152985A (en) 1977-12-19
NL7706458A (nl) 1977-12-16

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: THE DOW CHEMICAL CY

Effective date: 19890630