GB1255723A - Depolymerization of cellulose ethers by electron irradiation - Google Patents

Depolymerization of cellulose ethers by electron irradiation

Info

Publication number
GB1255723A
GB1255723A GB3068269A GB3068269A GB1255723A GB 1255723 A GB1255723 A GB 1255723A GB 3068269 A GB3068269 A GB 3068269A GB 3068269 A GB3068269 A GB 3068269A GB 1255723 A GB1255723 A GB 1255723A
Authority
GB
United Kingdom
Prior art keywords
cellulose
ether
cellulose ether
depolymerization
cellulose ethers
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
Application number
GB3068269A
Inventor
George Jacob Atchison
Raymond Max Narlock
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 Chemical Co
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 GB1255723A publication Critical patent/GB1255723A/en
Expired 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
    • 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
    • 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
    • C08B11/02—Alkyl or cycloalkyl 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)
  • Processes Of Treating Macromolecular Substances (AREA)

Abstract

1,255,723. Depolymerization of cellulose ethers by electron irradiation. DOW CHEMICAL CO. 17 June, 1969 [18 June, 1968], No. 30682/69. Heading C3A. Water-soluble cellulose ethers are depolymerized by irradiating a layer of a free-flowing, particulate, water-soluble cellulose ether having a uniform depth adjusted to within 10% of the penetration depth of the beam, with a beam of accelerated electrons and thoroughly blending the thus-treated cellulose ether. The beam may be accelerated by a 0.3 to 10 Mev. accelerator. Preferably a cellulose ether, the 2 weight per cent aqueous solution of which has a viscosity at 20‹ C. of 50 centipoises, is irradiated and blended to prepare an irradiated cellulose ether, the 2 weight per cent aqueous solution of which has a viscosity at 20‹ C. of 2 to 25 centipoises. The cellulose ether depolymerized may be a C 1-4 alkyl or hydroxyalkyl ether such as methyl-, ethyl-, hydroxyethyl-, hydroxypropylmethyl-, or hydroxyethylmethyl cellulose ; or a carboxyalkyl cellulose such as carboxymethyl-, methylcarboxymethyl-, hydroxypropylcarboxymethyl-, carboxymethylhydroxyethyl or ethylhydroxyethylcellulose ether.
GB3068269A 1968-06-18 1969-06-17 Depolymerization of cellulose ethers by electron irradiation Expired GB1255723A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US73797368A 1968-06-18 1968-06-18

Publications (1)

Publication Number Publication Date
GB1255723A true GB1255723A (en) 1971-12-01

Family

ID=24966040

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3068269A Expired GB1255723A (en) 1968-06-18 1969-06-17 Depolymerization of cellulose ethers by electron irradiation

Country Status (2)

Country Link
DE (1) DE1928045A1 (en)
GB (1) GB1255723A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004000886A1 (en) * 2002-06-21 2003-12-31 Laboratori Derivati Organici S.P.A. Process for the physical depolymerization of glycosaminoglycanes and products obtained therefrom
EP1551882A2 (en) * 2002-06-25 2005-07-13 Rhodia, Inc. Molecular weight reduction of polysaccharides by electron beams
GB2493490A (en) * 2011-05-20 2013-02-13 Innovia Films Ltd Process for dissolving and casting non-dissolving cellulose
GB2493488A (en) * 2011-05-20 2013-02-13 Innovia Films Ltd Process for dissolving and casting non-dissolving cellulose
US8889653B2 (en) 2002-06-25 2014-11-18 Rhodia, Inc. Grafting polymerization of guar and other polysaccharides by electron beams
US20160167010A1 (en) * 2008-04-30 2016-06-16 Xyleco, Inc. Processing biomass
US20180100030A1 (en) * 2016-10-06 2018-04-12 Shin-Etsu Chemical Co., Ltd. Method for producing low polymerization degree cellulose ether

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU812929A1 (en) * 1978-01-06 1981-03-15 Специальное Конструкторско-Технологическоебюро "Главтоннельметростроя" Movable form
DE4434280C2 (en) 1994-09-26 1998-09-10 Clariant Gmbh Process for the production of low molecular weight cellulose ethers and their use as coating material for solid dosing units
RU2298561C2 (en) 2001-03-15 2007-05-10 Саппи Лимитед Cellulose processing process
US8212087B2 (en) * 2008-04-30 2012-07-03 Xyleco, Inc. Processing biomass

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004000886A1 (en) * 2002-06-21 2003-12-31 Laboratori Derivati Organici S.P.A. Process for the physical depolymerization of glycosaminoglycanes and products obtained therefrom
EP1551882A2 (en) * 2002-06-25 2005-07-13 Rhodia, Inc. Molecular weight reduction of polysaccharides by electron beams
EP1551882A4 (en) * 2002-06-25 2005-12-14 Rhodia Molecular weight reduction of polysaccharides by electron beams
US7259192B2 (en) 2002-06-25 2007-08-21 Rhodia, Inc. Molecular weight reduction of polysaccharides by electron beams
US8889653B2 (en) 2002-06-25 2014-11-18 Rhodia, Inc. Grafting polymerization of guar and other polysaccharides by electron beams
US20160167010A1 (en) * 2008-04-30 2016-06-16 Xyleco, Inc. Processing biomass
US9968905B2 (en) * 2008-04-30 2018-05-15 Xyleco, Inc. Processing biomass
US10533195B2 (en) * 2008-04-30 2020-01-14 Xyleco, Inc. Processing biomass
GB2493490A (en) * 2011-05-20 2013-02-13 Innovia Films Ltd Process for dissolving and casting non-dissolving cellulose
GB2493488A (en) * 2011-05-20 2013-02-13 Innovia Films Ltd Process for dissolving and casting non-dissolving cellulose
US20180100030A1 (en) * 2016-10-06 2018-04-12 Shin-Etsu Chemical Co., Ltd. Method for producing low polymerization degree cellulose ether
US10906992B2 (en) * 2016-10-06 2021-02-02 Shin-Etsu Chemical Co., Ltd. Method for producing low polymerization degree cellulose ether

Also Published As

Publication number Publication date
DE1928045A1 (en) 1970-01-02

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