BR9912637A - Production of polysaccharide ethers - Google Patents
Production of polysaccharide ethersInfo
- 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
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)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Polysaccharides And Polysaccharide Derivatives (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.
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
MX2011007981A (en) * | 2009-02-03 | 2011-09-15 | Hercules Inc | Process for treating biomass to derivatize polysaccharides contained therein to increase their accessibility to hydrolysis and subsequent fermentation. |
CA2777130A1 (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)
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 |
-
1999
- 1999-08-03 AU AU54643/99A patent/AU5464399A/en not_active Abandoned
- 1999-08-03 BR BR9912637-0A patent/BR9912637A/en not_active Application Discontinuation
- 1999-08-03 CA CA002339374A patent/CA2339374A1/en not_active Abandoned
- 1999-08-03 EP EP99940869A patent/EP1109834A1/en not_active Withdrawn
- 1999-08-03 CN CNB998117498A patent/CN1173994C/en not_active Expired - Fee Related
- 1999-08-03 WO PCT/US1999/017597 patent/WO2000008059A1/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
CA2339374A1 (en) | 2000-02-17 |
EP1109834A1 (en) | 2001-06-27 |
CN1173994C (en) | 2004-11-03 |
AU5464399A (en) | 2000-02-28 |
CN1322215A (en) | 2001-11-14 |
WO2000008059A1 (en) | 2000-02-17 |
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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] |