GB513996A - Manufacture of water-soluble cellulose ethers - Google Patents
Manufacture of water-soluble cellulose ethersInfo
- Publication number
- GB513996A GB513996A GB1223238A GB1223238A GB513996A GB 513996 A GB513996 A GB 513996A GB 1223238 A GB1223238 A GB 1223238A GB 1223238 A GB1223238 A GB 1223238A GB 513996 A GB513996 A GB 513996A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- dissolved
- treated
- ethylene oxide
- caustic soda
- 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
- 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)
- 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
513,996. Cellulose ethers. GROVES, W. W. (Kalle & Co., Akt.-Ges.). April 23, 1938, No. 12232. [Class 2 (ii)] A water-insoluble alkali-soluble methyl cellulose or hydroxyalkyl cellulose is dissolved in dilute caustic soda solution of 5 per cent. strength or less, and reacted with so much of a hydroxyalkylating agent that a water-soluble product is obtained. The concentration of the water-insoluble cellulose ether in the caustic soda solution is preferably greater than 3 per cent., e.g. 8-10 per cent. By using 0.5-2.0 mols. of a hydroxyalkylating agent, products are obtained whose aqueous solutions are stable to boiling. In an example : (1) methyl cellulose containing 12 per cent. of methoxyl is dissolved in caustic soda lye of 2 per cent. strength and treated with ethylene oxide. The product is neutralized with acetic acid and precipitated and washed with alcohol. (2) Methyl cellulose containing 11.5 per cent. of methoxyl is. dissolved in 1 per cent. caustic soda lye with cooling, and then treated with ethylene oxide. (3) Methyl cellulose having 17 per cent. of methoxyl is dissolved in soda lye, treated with ethylene oxide, and the solution neutralized, evaporated and extracted with alcohol. (4) Alkali cellulose is treated with 5 per cent. of its weight of ethylene oxide and the product neutralized, filtered, washed and dried. It is then dissolved in caustic soda lye, treated with ethylene oxide, neutralized, precipitated and washed with alcohol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1223238A GB513996A (en) | 1938-04-23 | 1938-04-23 | Manufacture of water-soluble cellulose ethers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1223238A GB513996A (en) | 1938-04-23 | 1938-04-23 | Manufacture of water-soluble cellulose ethers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB513996A true GB513996A (en) | 1939-10-27 |
Family
ID=10000784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1223238A Expired GB513996A (en) | 1938-04-23 | 1938-04-23 | Manufacture of water-soluble cellulose ethers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB513996A (en) |
-
1938
- 1938-04-23 GB GB1223238A patent/GB513996A/en not_active Expired
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