GB527973A - Improvements in preparation of mixed fatty acid esters of cellulose - Google Patents
Improvements in preparation of mixed fatty acid esters of celluloseInfo
- Publication number
- GB527973A GB527973A GB11098/39A GB1109839A GB527973A GB 527973 A GB527973 A GB 527973A GB 11098/39 A GB11098/39 A GB 11098/39A GB 1109839 A GB1109839 A GB 1109839A GB 527973 A GB527973 A GB 527973A
- Authority
- GB
- United Kingdom
- Prior art keywords
- propionic
- acid
- added
- sulphuric
- cellulose
- 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
- C08B3/16—Preparation of mixed organic cellulose esters, e.g. cellulose aceto-formate or cellulose aceto-propionate
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Artificial Filaments (AREA)
- Coloring Foods And Improving Nutritive Qualities (AREA)
Abstract
527,973. Cellulose esters. KODAK, Ltd. April 12, 1939, No. 11098. Convention date, April 12, 1938. [Class 2 (ii)] In a process for the preparation of cellulose acetate propionate or butyrate containing not less than 10 per cent of propionyl or butyryl, the cellulose is pre-soaked in acetic acid, propionic or butyric acid is added, the the mixture cooled to less than 60‹ F. An anhydride-free solution of sulphuric acid in propionic or butyric acid is then added and the mixture kept at 40-60‹ F. for a short time. The reaction is impelled by adding an anhydride, usually acetic, sometimes propionic or butyric, with or without more sulphuric and fatty acids. The bath should contain at least 20 per cent propionyl or butyryl group, based on total content of acyl radical. In an example, cotton linters are pre-soaked with acetic acid at 130‹ F., propionic acid added, and the mixture cooled to 50‹ F. More propionic acid and some sulphuric acid are added and the mixture kept at 50‹ F. for two hours. Finally, the reaction is impelled by adding acetic anhydride, propionic and sulphuric acids previously cooled to 0-30‹ F., and the temperature allowed to reach a maximum of 80‹ F. After two hours a clear highly viscous solution free from grain and fibres is obtained. Specifications 287,880, and 313,408, [both in Class 2 (ii)], and U.S.A. Specifications 2,026,583 and 2,150,690 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US527973XA | 1938-04-12 | 1938-04-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB527973A true GB527973A (en) | 1940-10-21 |
Family
ID=21979948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB11098/39A Expired GB527973A (en) | 1938-04-12 | 1939-04-12 | Improvements in preparation of mixed fatty acid esters of cellulose |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB527973A (en) |
-
1939
- 1939-04-12 GB GB11098/39A patent/GB527973A/en not_active Expired
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