GB383611A - Manufacture of cellulose ethers - Google Patents
Manufacture of cellulose ethersInfo
- Publication number
- GB383611A GB383611A GB4290/31A GB429031A GB383611A GB 383611 A GB383611 A GB 383611A GB 4290/31 A GB4290/31 A GB 4290/31A GB 429031 A GB429031 A GB 429031A GB 383611 A GB383611 A GB 383611A
- Authority
- GB
- United Kingdom
- Prior art keywords
- carbonic acid
- cellulose
- washed
- ethyl chloride
- readily
- 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
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
In the production of cellulose ethers, alkylation is effected in the presence of a salt of carbonic acid whereby the presence of free mineral acid is avoided and also the end of the reaction can readily be ascertained by the presence of free carbonic acid. The products are neutral and can be readily washed. Carbonates such as that of sodium, potassium, calcium or barium may be added in solid condition; or soluble carbonates maybe added in solution or may be produced in the alkali cellulose by treatment with carbonic acid. In an example, 100-200 parts of alkali cellulose is mixed with 1 part sodium carbonate and ethylated with an excess of ethyl chloride at 100-140 DEG C. After 1 hour samples of gas are withdrawn and passed through baryta water, and as soon as a considerable quantity of barium carbonate is precipitated, the excess ethyl chloride is distilled. The residue is disintegrated, washed and dried. Specifications 200,827 and 305,946, [both in Class 2 (ii), Cellulose &c.], are referred to; also German Specifications 408,342, 435,346, 488,780 and 499,129 and U.S.A. Specification 1,694,127.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE383611X | 1930-02-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB383611A true GB383611A (en) | 1932-11-17 |
Family
ID=6365745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4290/31A Expired GB383611A (en) | 1930-02-15 | 1931-02-11 | Manufacture of cellulose ethers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB383611A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2698254A (en) * | 1951-03-30 | 1954-12-28 | Hercules Powder Co Ltd | Process for treating a reaction mixture containing hydroxyalkyl cellulose and alkali |
-
1931
- 1931-02-11 GB GB4290/31A patent/GB383611A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2698254A (en) * | 1951-03-30 | 1954-12-28 | Hercules Powder Co Ltd | Process for treating a reaction mixture containing hydroxyalkyl cellulose and alkali |
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