BR9912637A - Production of polysaccharide ethers - Google Patents

Production of polysaccharide ethers

Info

Publication number
BR9912637A
BR9912637A BR9912637-0A BR9912637A BR9912637A BR 9912637 A BR9912637 A BR 9912637A BR 9912637 A BR9912637 A BR 9912637A BR 9912637 A BR9912637 A BR 9912637A
Authority
BR
Brazil
Prior art keywords
production
ethers
acids
processes
bases
Prior art date
Application number
BR9912637-0A
Other languages
Portuguese (pt)
Inventor
Charles B Mallon
John S Vames
John Ioannis Sarlis
Benito See
David M Trampe
Rathin Datta
Original Assignee
Union Carbide Chem Plastic
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 Union Carbide Chem Plastic filed Critical Union Carbide Chem Plastic
Publication of BR9912637A publication Critical patent/BR9912637A/en

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
    • 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
    • C08B11/04—Alkyl or cycloalkyl ethers with substituted hydrocarbon radicals
    • C08B11/08—Alkyl or cycloalkyl ethers with substituted hydrocarbon radicals with hydroxylated hydrocarbon radicals; Esters, ethers, or acetals thereof

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)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

"PRODUçãO DE éTERES DE POLISSACARìDEOS" Processos para a produção de éteres de polissacarídeos, por ex., éteres de celulose, são revelados onde sais formados durante o processo, por ex., nitrato de sódio ou acetato de sódio, são convertidos aos seus correspondentes ácidos e bases por meio de uma corrente elétrica, preferivelmente em combinação com uma membrana bipolar e adequadas membranas catiónicas e/ou aniónicas. Os ácidos e bases recuperados a partir dos processos podem ser reciclados, com isso evitando a necessidade de se prevenir quanto ao descarte dos sais."PRODUCTION OF POLYESACARIDE ETHERS" Processes for the production of polysaccharide ethers, eg cellulose ethers, are revealed where salts formed during the process, eg sodium nitrate or sodium acetate, are converted to their counterparts acids and bases by means of an electric current, preferably in combination with a bipolar membrane and suitable cationic and / or anionic membranes. The acids and bases recovered from the processes can be recycled, thereby avoiding the need to prevent the disposal of salts.

BR9912637-0A 1998-08-04 1999-08-03 Production of polysaccharide ethers BR9912637A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US9526398P 1998-08-04 1998-08-04
PCT/US1999/017597 WO2000008059A1 (en) 1998-08-04 1999-08-03 Production of polysaccharide ethers

Publications (1)

Publication Number Publication Date
BR9912637A true BR9912637A (en) 2001-10-09

Family

ID=22251017

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9912637-0A BR9912637A (en) 1998-08-04 1999-08-03 Production of polysaccharide ethers

Country Status (6)

Country Link
EP (1) EP1109834A1 (en)
CN (1) CN1173994C (en)
AU (1) AU5464399A (en)
BR (1) BR9912637A (en)
CA (1) CA2339374A1 (en)
WO (1) WO2000008059A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2393932A2 (en) 2009-02-03 2011-12-14 Hercules Incorporated Process for treating biomass to derivatize polysaccharides contained therein to increase their accessibility to hydrolysis and subsequent fermentation
WO2011053965A2 (en) * 2009-11-02 2011-05-05 Hercules Incorporated Process for treating biomass to increase accessibility of polysaccharides contained therein to hydrolysis and subsequent fermentation, and polysaccharides with increased accessibility
CN107226869A (en) * 2017-06-29 2017-10-03 华南理工大学 A kind of method that soda acid collaboration pretreatment prepares high substituted degree hydroxyl butyl starch

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1668347A1 (en) * 1967-12-20 1971-09-16 Kalle Ag Process for purifying raw hydroxyethyl cellulose
DE3446695A1 (en) * 1984-12-21 1986-06-26 Basf Ag, 6700 Ludwigshafen METHOD FOR CONCENTRATING AQUEOUS SOLUTIONS OF ORGANIC COMPOUNDS CONTAINING SALT, WITH A SIMULTANEOUS REDUCTION OF SALT
JPS61271296A (en) * 1985-05-28 1986-12-01 Kyogyo Kumiai N F I Production of n-acetylchito-oligosaccharide
JPH0195101A (en) * 1987-10-05 1989-04-13 Dai Ichi Kogyo Seiyaku Co Ltd Manufacture of high-purity acid-type cellulose derivative
JP2514389B2 (en) * 1987-12-07 1996-07-10 第一工業製薬株式会社 Method for producing modified cellulose ether
JPH03229621A (en) * 1989-10-20 1991-10-11 Asahi Glass Co Ltd Water splitter system by electric dialysis
US5294316A (en) * 1989-10-31 1994-03-15 Lenzing Aktiengesellschaft Process and apparatus for electrodialysis of an alkali sulfate containing aqueous solution
FR2729305A1 (en) * 1995-01-18 1996-07-19 Atochem Elf Sa REGENERATION OF STRONG ORGANIC ACIDS BY BIPOLAR MEMBRANES

Also Published As

Publication number Publication date
CN1173994C (en) 2004-11-03
AU5464399A (en) 2000-02-28
CA2339374A1 (en) 2000-02-17
EP1109834A1 (en) 2001-06-27
WO2000008059A1 (en) 2000-02-17
CN1322215A (en) 2001-11-14

Similar Documents

Publication Publication Date Title
BR9307031A (en) Process of forming cellulose solution in a tertiary n-oxide amine
BR0110136B1 (en) bipolar membrane manufacturing process and use of the obtained bipolar membrane.
ATE36541T1 (en) STABLE SULPHO-ADENOSYL-L-METHIONINE (SAME) SALTS PARTICULARLY SUITABLE FOR ORAL PHARMACEUTICAL USE.
ATE54124T1 (en) EFFLUENT TREATMENT.
DE60006677D1 (en) PRODUCTION OF CHEMICAL CELL AND XYLOSE USING DIRECT ACID HYDROLYSIS OF THE CELL
KR850004496A (en) Method for preparing antibiotic L 17392 (degluco teicoplanin) and salts thereof
BR9912637A (en) Production of polysaccharide ethers
DE69301258D1 (en) Process for the production of sodium hydroxide
ATE169351T1 (en) METHOD FOR PURIFYING RECOVERED N-METHYLMORPHOLINE N-OXIDE SOLUTIONS
FI941640A (en) Process for preparing a bipolar membrane and process for preparing an aqueous solution of alkali metal hydroxide
BR9914296A (en) Process for removing or reducing the color of an aqueous solution of 2,3-epoxypropyltrialkylamino halide
NO975005D0 (en) Process for preparing an aqueous sodium hydroxide solution
DE69839023D1 (en) METHOD FOR PRODUCING STEAM FROM BLACK RIVER
KR910009637A (en) Production Method of Vinyl-GABA
JPS573827A (en) Production of solubilized silk peptide and skin cosmetics containing the same
ATE238372T1 (en) PURIFICATION OF POLYPHOSPHACENE ACID
SE9303762L (en) Ways to purify process water from pulp production
SU633822A1 (en) Method of purifying waste water of viscose fibre production
DE69805791D1 (en) PRODUCTION OF SUBSTITUTED PHOPHID SALTS
KR970026938A (en) How to Clean Pickling Wastes
BR8204153A (en) PROCESS TO SYNTHESIZE N-ISOPROPIL-N'-0-CARBOMETOXI-PHENYL-SULFAMIDE
JPS5442423A (en) Production of protein fiber or film
Tabuchi et al. A new type of endo-xyloglucan transferase devoted to xyloglucan hydrolysis in the cell wall of azuki bean [Vigna angularis] epicotyls
IT7950415A0 (en) FOR THEIR PRODUCTION, IMPROVEMENT IN CELLULOSE DIALYSIS MEMBRANES AND PROCEDURE
RU98113272A (en) METHOD FOR PREPARING MEDICINES

Legal Events

Date Code Title Description
FA10 Dismissal: dismissal - article 33 of industrial property law
B11Y Definitive dismissal - extension of time limit for request of examination expired [chapter 11.1.1 patent gazette]