GB638316A - Improvements in the production of organic esters of cellulose - Google Patents
Improvements in the production of organic esters of celluloseInfo
- Publication number
- GB638316A GB638316A GB25068/47A GB2506847A GB638316A GB 638316 A GB638316 A GB 638316A GB 25068/47 A GB25068/47 A GB 25068/47A GB 2506847 A GB2506847 A GB 2506847A GB 638316 A GB638316 A GB 638316A
- Authority
- GB
- United Kingdom
- Prior art keywords
- long chain
- per cent
- polyhydric alcohols
- cellulose
- acids
- 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
- C08B3/30—Stabilising
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
Organic esters of cellulose in the production of which sulphuric acid has been used as catalyst are stabilized by heating them with an aqueous liquid of alkalinity (reckoned as calcium carbonate) less than 5 parts per million and a surface-active agent, to a temperature above 100 DEG C. under pressure. The process may be applied to cellulose acetates having an acetyl value of 55 per cent to 57 per cent or more, calculated as acetic acid. The surface-active agents are preferably non-ionic or anionic. They include the partial esters of polyhydric alcohols with long chain carboxylic acids, short chain hydroxy-alkyl ethers of polyhydric alcohols esterified with long chain fatty acids, long chain polyhydric alcohols, polyethylene glycols having a molecular weight of 200-600, condensation products of fatty acids with mixtures of amino-acids and polypeptides made by hydrolysing proteins, and salts of straight or branched long chain alkyl sulphates, for example sodium secondary tetradecyl sulphate. The preferred agents are long chain fatty acid partial esters of polyoxyalkylene derivatives of hexitol anhydrides, and 0.1 per cent to 10 per cent by weight of the surface-active agent may be used. The stabilisation may be carried out at a temperature of 130-160 DEG C. Examples are given of the use of polyoxyethylene sorbitan monolaurate and the Registered Trade Mark "Triton NE."
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US638316XA | 1946-09-13 | 1946-09-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB638316A true GB638316A (en) | 1950-06-07 |
Family
ID=22051810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB25068/47A Expired GB638316A (en) | 1946-09-13 | 1947-09-12 | Improvements in the production of organic esters of cellulose |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB638316A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4269972A (en) * | 1978-06-09 | 1981-05-26 | Daicel Ltd. | Process for producing cellulose diacetate having improved resistance to delustering phenomenon in hot water |
-
1947
- 1947-09-12 GB GB25068/47A patent/GB638316A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4269972A (en) * | 1978-06-09 | 1981-05-26 | Daicel Ltd. | Process for producing cellulose diacetate having improved resistance to delustering phenomenon in hot water |
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