GB568439A - Improvements in the production of cellulose esters - Google Patents
Improvements in the production of cellulose estersInfo
- Publication number
- GB568439A GB568439A GB6181/43A GB618143A GB568439A GB 568439 A GB568439 A GB 568439A GB 6181/43 A GB6181/43 A GB 6181/43A GB 618143 A GB618143 A GB 618143A GB 568439 A GB568439 A GB 568439A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cellulose
- formic
- esterification
- formate
- diluent
- 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)
- 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 acetate-formate is produced by mixing cellulose with formic-acetic anhydride and then carrying out the esterification in the presence of an esterification catalyst and a diluent. The cellulosic material employed, which may be pretreated with formic and/or acetic acids containing a small quantity of sulphuric acid, may be cotton, cotton linters, wood pulp, regenerated cellulose, or cellulose obtained from grass, straw, husks, etc. Specified catalysts are sulphuric, hydrochloric and phosphoric acids, phosphorus pentoxide and zinc chloride. Specified diluents which may be solvents or non-solvents for the cellulose acetate-formate, are formic and/or acetic acids, benzene, toluene, and carbon tetrachloride. By varying the proportions of diluent and catalyst employed, esters of varying acetyl and formyl contents are produced. In the examples, the esterification continues for 7 or 24 hours during which time a peak temperature of 30 DEG C. is attained. Water is added to the mixture and the ester is precipitated, washed and dried.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US568439XA | 1942-04-23 | 1942-04-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB568439A true GB568439A (en) | 1945-04-05 |
Family
ID=22006903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB6181/43A Expired GB568439A (en) | 1942-04-23 | 1943-04-17 | Improvements in the production of cellulose esters |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB568439A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4480090A (en) * | 1983-10-21 | 1984-10-30 | Eastman Kodak Company | Process for esterification of cellulose using as the catalyst the combination of sulfuric acid, phosphoric acid and a hindered aliphatic alcohol |
| US7879994B2 (en) | 2003-11-28 | 2011-02-01 | Eastman Chemical Company | Cellulose interpolymers and method of oxidation |
-
1943
- 1943-04-17 GB GB6181/43A patent/GB568439A/en not_active Expired
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4480090A (en) * | 1983-10-21 | 1984-10-30 | Eastman Kodak Company | Process for esterification of cellulose using as the catalyst the combination of sulfuric acid, phosphoric acid and a hindered aliphatic alcohol |
| US7879994B2 (en) | 2003-11-28 | 2011-02-01 | Eastman Chemical Company | Cellulose interpolymers and method of oxidation |
| JP2012233205A (en) * | 2003-11-28 | 2012-11-29 | Eastman Chemical Co | Cellulose interpolymer and method of oxidation |
| EP2532684A2 (en) | 2003-11-28 | 2012-12-12 | Eastman Chemical Company | Cellulose interpolymers and method of oxidation |
| EP2532683A2 (en) | 2003-11-28 | 2012-12-12 | Eastman Chemical Company | Cellulose interpolymers and method of oxidation |
| US8816066B2 (en) | 2003-11-28 | 2014-08-26 | Eastman Chemical Company | Cellulose interpolymers and methods of oxidation |
| US9040685B2 (en) | 2003-11-28 | 2015-05-26 | Eastman Chemical Company | Cellulose interpolymers and method of oxidation |
| US9040683B2 (en) | 2003-11-28 | 2015-05-26 | Eastman Chemical Company | Cellulose interpolymers and method of oxidation |
| US9040684B2 (en) | 2003-11-28 | 2015-05-26 | Eastman Chemical Company | Cellulose interpolymers and method of oxidation |
| US9150665B2 (en) | 2003-11-28 | 2015-10-06 | Eastman Chemical Company | Cellulose interpolymers and method of oxidation |
| US9243072B2 (en) | 2003-11-28 | 2016-01-26 | Eastman Chemical Company | Cellulose interpolymers and method of oxidation |
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