DE3665312D1 - Purification of cellulose ethers - Google Patents
Purification of cellulose ethersInfo
- Publication number
- DE3665312D1 DE3665312D1 DE8686301790T DE3665312T DE3665312D1 DE 3665312 D1 DE3665312 D1 DE 3665312D1 DE 8686301790 T DE8686301790 T DE 8686301790T DE 3665312 T DE3665312 T DE 3665312T DE 3665312 D1 DE3665312 D1 DE 3665312D1
- Authority
- DE
- Germany
- Prior art keywords
- purification
- cellulose ethers
- ethers
- cellulose
- 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
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
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)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/712,287 US4581446A (en) | 1985-03-15 | 1985-03-15 | Purification of cellulose ethers |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3665312D1 true DE3665312D1 (en) | 1989-10-05 |
Family
ID=24861499
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE8686301790T Expired DE3665312D1 (en) | 1985-03-15 | 1986-03-12 | Purification of cellulose ethers |
Country Status (6)
Country | Link |
---|---|
US (1) | US4581446A (de) |
EP (1) | EP0194877B2 (de) |
JP (1) | JPS61252201A (de) |
BR (1) | BR8601149A (de) |
CA (1) | CA1275650C (de) |
DE (1) | DE3665312D1 (de) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2737109B2 (ja) * | 1985-09-20 | 1998-04-08 | 株式会社リコー | 音声区間検出方式 |
US4820813A (en) * | 1986-05-01 | 1989-04-11 | The Dow Chemical Company | Grinding process for high viscosity cellulose ethers |
DE3628826A1 (de) * | 1986-08-25 | 1988-03-03 | Henkel Kgaa | Verfahren zur aufarbeitung von wasserloeslichen cellulosederivaten mit hohen flockungspunkten |
DE3729268A1 (de) * | 1987-09-02 | 1989-03-16 | Henkel Kgaa | Verfahren und anlage zur abtrennung und reinigung von celluloseethern und anderen cellulosederivaten |
EP0384573A1 (de) * | 1989-01-23 | 1990-08-29 | The Dow Chemical Company | Entfernen von farbigem Material aus Lösungen von wasserlöslichen Polymeren |
FI925499A (fi) * | 1991-12-06 | 1993-06-07 | Hoechst Ag | Foerfarande foer renande behandling av reaktions- och/eller tvaettmedier som uppstaor vid framstaellning av cellulosaetrar |
US5218107A (en) * | 1991-12-30 | 1993-06-08 | The Dow Chemical Company | Removal of undesirable material from water-soluble cellulose ether aqueous solutions |
KR100461564B1 (ko) * | 2001-11-24 | 2004-12-14 | 삼성정밀화학 주식회사 | 셀룰로스에테르의 제조방법 |
KR101137639B1 (ko) * | 2004-11-02 | 2012-04-19 | 신에쓰 가가꾸 고교 가부시끼가이샤 | 수용성 셀룰로오스 에테르의 분리 방법 |
KR20170025168A (ko) * | 2015-08-27 | 2017-03-08 | 롯데정밀화학 주식회사 | 셀룰로오스 에테르의 제조 방법 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1468048B2 (de) * | 1964-11-28 | 1975-02-20 | Henkel & Cie Gmbh, 4000 Duesseldorf | Verfahren zur Herstellung von Hydroxypropyl-methylcellulosen |
US3448100A (en) * | 1968-04-18 | 1969-06-03 | Dow Chemical Co | Manufacture of carboxymethyl hydroalkyl mixed cellulose ethers |
US4018681A (en) * | 1972-10-13 | 1977-04-19 | International Telephone And Telegraph Corporation | Filtration of cellulosic solutions |
US4229572A (en) * | 1979-03-05 | 1980-10-21 | The Dow Chemical Company | Purification of cellulose ether reaction product |
DE2912486A1 (de) * | 1979-03-29 | 1980-10-09 | Henkel Kgaa | Verfahren zum reinigen von kaltwasserloeslichen celluloseethern und verwendung der gereinigten produkte, insbesondere in wasch- und reinigungsmitteln |
DE3043621A1 (de) * | 1980-11-19 | 1982-07-08 | Bayer Ag, 5090 Leverkusen | Reinigung von cellulose- und staerkeethern |
DE3044696A1 (de) * | 1980-11-27 | 1982-06-24 | Bayer Ag, 5090 Leverkusen | Reinigung von cellulose- und staerkeethern |
-
1985
- 1985-03-15 US US06/712,287 patent/US4581446A/en not_active Expired - Lifetime
-
1986
- 1986-03-11 CA CA000503725A patent/CA1275650C/en not_active Expired - Fee Related
- 1986-03-12 EP EP86301790A patent/EP0194877B2/de not_active Expired - Lifetime
- 1986-03-12 DE DE8686301790T patent/DE3665312D1/de not_active Expired
- 1986-03-14 BR BR8601149A patent/BR8601149A/pt unknown
- 1986-03-14 JP JP61055156A patent/JPS61252201A/ja active Granted
Also Published As
Publication number | Publication date |
---|---|
EP0194877B1 (de) | 1989-08-30 |
CA1275650C (en) | 1990-10-30 |
JPS61252201A (ja) | 1986-11-10 |
EP0194877A1 (de) | 1986-09-17 |
BR8601149A (pt) | 1986-11-25 |
EP0194877B2 (de) | 1998-01-28 |
JPH0546361B2 (de) | 1993-07-13 |
US4581446A (en) | 1986-04-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8363 | Opposition against the patent | ||
8366 | Restricted maintained after opposition proceedings |