GB864766A - Improvements in or relating to the production of cellulose ethers - Google Patents
Improvements in or relating to the production of cellulose ethersInfo
- Publication number
- GB864766A GB864766A GB1163759A GB1163759A GB864766A GB 864766 A GB864766 A GB 864766A GB 1163759 A GB1163759 A GB 1163759A GB 1163759 A GB1163759 A GB 1163759A GB 864766 A GB864766 A GB 864766A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cellulose
- soda
- stirred
- aqueous solution
- reaction vessel
- 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
- C08B11/02—Alkyl or cycloalkyl ethers
Abstract
Cellulose ethers are made by comminuting cellulose to an average fibre length of less than 1 mm., converting the cellulose into soda cellulose in a reaction vessel by spraying it with a concentrated aqueous solution of sodium hydroxide while it is being stirred, and alkylating the soda cellulose with a gaseous or liquid alkylating agent in the same reaction vessel. In the example, 1 kg. of cellulose ground to a fibre length of 130 microns is sprayed (while being stirred) with a 50% by weight aqueous solution of caustic soda at 50 DEG C. in an autoclave, the free space in which is occupied by nitrogen. The soda cellulose thus formed is then heated to 80 DEG C. and subjected to a constant methyl chloride pressure of 3-5 atm. gauge for 1 hour. The methanol formed is distilled off, the sodium chloride is removed from the crude product and the methyl cellulose is centrifuged and dried. The process reduces the consumption of caustic soda and alkylating agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1163759A GB864766A (en) | 1959-04-06 | 1959-04-06 | Improvements in or relating to the production of cellulose ethers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1163759A GB864766A (en) | 1959-04-06 | 1959-04-06 | Improvements in or relating to the production of cellulose ethers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB864766A true GB864766A (en) | 1961-04-06 |
Family
ID=9989940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1163759A Expired GB864766A (en) | 1959-04-06 | 1959-04-06 | Improvements in or relating to the production of cellulose ethers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB864766A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4117223A (en) * | 1976-08-06 | 1978-09-26 | Loedige Wilhelm | Process for the preparation of cellulose alkyl ethers |
| DE2929011A1 (en) * | 1979-07-18 | 1981-02-12 | Henkel Kgaa | PRODUCTION OF ALKYLCELLULOSE BY CONTINUOUS PROCEDURE |
-
1959
- 1959-04-06 GB GB1163759A patent/GB864766A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4117223A (en) * | 1976-08-06 | 1978-09-26 | Loedige Wilhelm | Process for the preparation of cellulose alkyl ethers |
| DE2929011A1 (en) * | 1979-07-18 | 1981-02-12 | Henkel Kgaa | PRODUCTION OF ALKYLCELLULOSE BY CONTINUOUS PROCEDURE |
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