GB370867A - Improvements in the manufacture of cellulose ethers - Google Patents
Improvements in the manufacture of cellulose ethersInfo
- Publication number
- GB370867A GB370867A GB30032/30A GB3003230A GB370867A GB 370867 A GB370867 A GB 370867A GB 30032/30 A GB30032/30 A GB 30032/30A GB 3003230 A GB3003230 A GB 3003230A GB 370867 A GB370867 A GB 370867A
- Authority
- GB
- United Kingdom
- Prior art keywords
- solvent
- cellulose
- methylene chloride
- bath
- boiling
- 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
- C08B3/00—Preparation of cellulose esters of organic acids
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 is esterified in a bath wherein instead of the whole or a part of the diluent acid generally used, there is present a low-boiling solvent of the primary ester by cellulose to be produced. The use of a low-boiling solvent, for example, methylene chloride, allows of easy control of the reaction temperature since any undue heat which may be generated is taken up in vaporizing the solvent. The solvent is readily recovered by distillation when the ester has been precipitated; for example the cellulose ester solution may be introduced into a bath of water heated to above the boiling-point of the volatile solvent used. Examples are given of the production of cellulose acetate in the presence of methylene chloride, and in one case the amount of methylene chloride used is such as to prevent the temperature of the bath going above 50 DEG C.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR370867X | 1929-10-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB370867A true GB370867A (en) | 1932-04-14 |
Family
ID=8894649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB30032/30A Expired GB370867A (en) | 1929-10-07 | 1930-10-07 | Improvements in the manufacture of cellulose ethers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB370867A (en) |
-
1930
- 1930-10-07 GB GB30032/30A patent/GB370867A/en not_active Expired
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