GB696903A - Improvements in and relating to the production of cellulose acetate - Google Patents
Improvements in and relating to the production of cellulose acetateInfo
- Publication number
- GB696903A GB696903A GB1940850A GB1940850A GB696903A GB 696903 A GB696903 A GB 696903A GB 1940850 A GB1940850 A GB 1940850A GB 1940850 A GB1940850 A GB 1940850A GB 696903 A GB696903 A GB 696903A
- Authority
- GB
- United Kingdom
- Prior art keywords
- solution
- water
- acetic acid
- cellulose acetate
- soluble
- 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
- C08B3/22—Post-esterification treatments, including purification
- C08B3/24—Hydrolysis or ripening
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)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Abstract
A water-insoluble cellulose acetate in solution in aqueous acetic acid is subjected to hydrolysis in the presence of a catalyst until it becomes water-soluble; the catalyst is then neutralized and the solution is dialyzed to remove substantially all the acetic acid and water-soluble salts. The aqueous solution of water-soluble cellulose acetate may be used for sizing textile yarns. Sulphuric acid may be used as the catalyst and it may be neutralized with sodium acetate. The course of the hydrolysis may be followed by periodically taking a sample of the solution and pouring it into water. The treatment is complete when a sample no longer forms a precipitate. Dialysis may be effected by means of a regenerated cellulose membrane. In an example, a solution of secondary cellulose acetate containing acetic acid and sulphuric acid is diluted with dilute acetic acid and the solution is maintained at 25 DEG C. for about 10 days until a test-sample shows that the cellulose acetate is soluble in water. Sodium acetate is then added to neutralize the sulphuric acid and the solution is then dialyzed until the acetic acid content is reduced to less than 2 per cent. The resulting solution may be used directly for sizing celulose acetate warps. Specification 479,239 and U.S.A. Specifications 2,129,052 and 2,169,757 are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1940850A GB696903A (en) | 1950-08-03 | 1950-08-03 | Improvements in and relating to the production of cellulose acetate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1940850A GB696903A (en) | 1950-08-03 | 1950-08-03 | Improvements in and relating to the production of cellulose acetate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB696903A true GB696903A (en) | 1953-09-09 |
Family
ID=10128862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1940850A Expired GB696903A (en) | 1950-08-03 | 1950-08-03 | Improvements in and relating to the production of cellulose acetate |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB696903A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2849443A (en) * | 1955-03-03 | 1958-08-26 | Celanese Corp | Production of organic acid esters of cellulose |
| US2861038A (en) * | 1955-03-03 | 1958-11-18 | Celanese Corp | Dewatering cellulose ester composition |
| US5142034A (en) * | 1990-04-16 | 1992-08-25 | Eastman Kodak Company | Cellulose ester compositions and process for the preparation thereof |
| US5597912A (en) * | 1990-04-16 | 1997-01-28 | Eastman Chemical Company | Process for preparing cellulose esters by use of carboxylic acids |
-
1950
- 1950-08-03 GB GB1940850A patent/GB696903A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2849443A (en) * | 1955-03-03 | 1958-08-26 | Celanese Corp | Production of organic acid esters of cellulose |
| US2861038A (en) * | 1955-03-03 | 1958-11-18 | Celanese Corp | Dewatering cellulose ester composition |
| US5142034A (en) * | 1990-04-16 | 1992-08-25 | Eastman Kodak Company | Cellulose ester compositions and process for the preparation thereof |
| US5597912A (en) * | 1990-04-16 | 1997-01-28 | Eastman Chemical Company | Process for preparing cellulose esters by use of carboxylic acids |
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