GB521446A - Improvements in and relating to cellulose derivatives and to a process for producingthe same - Google Patents
Improvements in and relating to cellulose derivatives and to a process for producingthe sameInfo
- Publication number
- GB521446A GB521446A GB3041738A GB3041738A GB521446A GB 521446 A GB521446 A GB 521446A GB 3041738 A GB3041738 A GB 3041738A GB 3041738 A GB3041738 A GB 3041738A GB 521446 A GB521446 A GB 521446A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cellulose
- alkali
- per cent
- soluble
- alkyl
- 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
- C08B11/193—Mixed ethers, i.e. ethers with two or more different etherifying groups
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
521,446. Cellulose ethers. REICHEL, F. H., and CORNWELL, R. T. K. Oct. 20, 938, No. 30417. [Class 2 (ii)] Cellulosic material dispersed or dissolved in an aqueous alkaline solution is etherified by adding to the dispersion or solution an etherifying agent and controlling the temperature so that it does not exceed 70‹C., the reaction being continued until a cellulose ether which is soluble at 0‹C. in aqueous sodium hydroxide solutions of 3 per cent. or less alkali concentration is obtained. The cellulosic material may be alkali cellulose or a low-etherified alkali-soluble cellulose ether which is soluble in sodium hydroxide solutions of more than 3 per cent. alkali concentration, e.g., 5 or 10 per cent. It may be a hydroxy alkyl cellulose ether. The starting material may be dispersed or dissolved in aqueous alkali solution of 5 to 10 per cent. strength. The alkali cellulose may be obtained from any natural form of cellulose or from a cellulose conversion product. It may be dissolved in 18 per cent. caustic soda by freezing and then thawing the mixture. The low-etherified cellulose ether may be an alkyl, hydroxy-alkyl, or mixed ether. The etherifying agent may be dimethyl sulphate, methyl sodium sulphate, ethyl chloride or bromide, an alkylene oxide or a halohydrin. The alkali may be sodium or potassium hydroxide, or an organic base such as dimethylamine or tri-benzyl methyl ammonium hydroxide. The etherifying agent may be added in solution or liquid form, and it may be added in small quantities over a period of several hours. The reaction should be stopped before the product is substantially soluble in water. Alkyl groups to the extent of 0.2 or hydroxyalkyl groups to the extent of 0.1 for each cellulose unit may be introduced. The products may be used in the production of artificial filaments, films, tubes, and other articles, or of adhesives, coatings, or sizes for textiles or paper, or as thickening. agents for pigments. They may be mixed with viscose, cuprammonium cellulose solutions, rubber latex, resins, gelatine, waxes, fats, or oils. Specifications 203,347 and 231,807, [both in Class 2 (ii)], are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3041738A GB521446A (en) | 1938-10-20 | 1938-10-20 | Improvements in and relating to cellulose derivatives and to a process for producingthe same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3041738A GB521446A (en) | 1938-10-20 | 1938-10-20 | Improvements in and relating to cellulose derivatives and to a process for producingthe same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB521446A true GB521446A (en) | 1940-05-22 |
Family
ID=10307360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3041738A Expired GB521446A (en) | 1938-10-20 | 1938-10-20 | Improvements in and relating to cellulose derivatives and to a process for producingthe same |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB521446A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111171582A (en) * | 2018-11-09 | 2020-05-19 | 西安工程大学 | Preparation method of self-dispersed cellulose microgel |
| CN111789301A (en) * | 2020-07-11 | 2020-10-20 | 罗金火 | Multilayer flow guiding porous body |
| CN112694536A (en) * | 2021-02-04 | 2021-04-23 | 浙江中维药业股份有限公司 | Preparation method of hydroxypropyl methyl cellulose |
-
1938
- 1938-10-20 GB GB3041738A patent/GB521446A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111171582A (en) * | 2018-11-09 | 2020-05-19 | 西安工程大学 | Preparation method of self-dispersed cellulose microgel |
| CN111789301A (en) * | 2020-07-11 | 2020-10-20 | 罗金火 | Multilayer flow guiding porous body |
| CN112694536A (en) * | 2021-02-04 | 2021-04-23 | 浙江中维药业股份有限公司 | Preparation method of hydroxypropyl methyl cellulose |
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