GB355563A - A process for the manufacture of cellulose ethers - Google Patents
A process for the manufacture of cellulose ethersInfo
- Publication number
- GB355563A GB355563A GB298?8/30A GB2982830A GB355563A GB 355563 A GB355563 A GB 355563A GB 2982830 A GB2982830 A GB 2982830A GB 355563 A GB355563 A GB 355563A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cellulose
- alkali
- preparation
- preliminary treatment
- etherifying
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B1/00—Preparatory treatment of cellulose for making derivatives thereof, e.g. pre-treatment, pre-soaking, activation
- C08B1/06—Rendering cellulose suitable for etherification
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)
Abstract
Cellulose ethers are prepared from material such as cotton, wood-cellulose, or sulphite-or sodium cellulose by subjecting the raw material to a short preliminary treatment with alkali lyes so as to remove oxycellulose, hemicellulose, pentoses, mannan, and xylan, washing with water till neutral, repeating this preliminary treatment if desired, drying, preparing alkali cellulose without introducing any ripening process, and etherifying with an ester of an inorganic acid. The alkali lye for the preparation of the alkali cellulose, and the etherifying agent are used in about or slightly above the theoretical amount. An example is given of the preparation of ethyl cellulose, the preliminary treatment with the caustic soda of 20-25 DEG B<\>e being repeated 4 to 5 times. The ethyl cellulose possesses a high viscosity and may be used in the preparation of films, insulating materials, lacquers, and plastic masses. Specifications 229,678, 249,173, 278,767 and 288,997, [all in Class 2 (ii), Cellulose &c.], are referred to. The Specification as open to inspection under Sect. 91 (3) (a) of the Acts comprises also the use of benzyl chloride as an etherifying agent. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE355563X | 1929-10-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB355563A true GB355563A (en) | 1931-08-27 |
Family
ID=6290025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB298?8/30A Expired GB355563A (en) | 1929-10-10 | 1930-10-06 | A process for the manufacture of cellulose ethers |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR705732A (en) |
| GB (1) | GB355563A (en) |
-
1930
- 1930-10-02 FR FR705732D patent/FR705732A/en not_active Expired
- 1930-10-06 GB GB298?8/30A patent/GB355563A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR705732A (en) | 1931-06-11 |
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