GB281927A - Manufactures of esters of the cellulose series - Google Patents
Manufactures of esters of the cellulose seriesInfo
- Publication number
- GB281927A GB281927A GB1049927A GB1049927A GB281927A GB 281927 A GB281927 A GB 281927A GB 1049927 A GB1049927 A GB 1049927A GB 1049927 A GB1049927 A GB 1049927A GB 281927 A GB281927 A GB 281927A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cellulose
- sulphuric acid
- per cent
- proportion
- esterification
- 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
281,927. Imray, O. Y., (I, G. Farbenindustrie Akt.-Ges.). April 19, 1927. Cellulose acetates and other carboxylates; preparatory treatment of cellulose. - Cellulose acetatates and other cellulose esters are prepared by treating cellulose with a small proportion of sulphuric acid in the presence of a diluent preferably acetic acid or other aliphatic acid, then adding acetic anhydride or other esterifying- agent so as partly to esterify the cellulose, and finally adding a further proportion of sulphuric acid with or without a further quantity of acetic anhydride &c. in order to complete the esterification. The initial material may be cellulose, for example, in the form of cotton or wood pulp, or hydrocellulose, oxycellulose, or feebly nitrated cellulose; and it is advisable to disintegrate the material before treatment. It is important that the proportion of sulphuric acid used in the first stage of the esterification should not exceed 2 per cent calculated on the cellulose; in examples, 0.5-1 per cent of sulphuric acid is employed, a further 4-5 per cent being added to complete the acetylation.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1049927A GB281927A (en) | 1927-04-19 | 1927-04-19 | Manufactures of esters of the cellulose series |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1049927A GB281927A (en) | 1927-04-19 | 1927-04-19 | Manufactures of esters of the cellulose series |
Publications (1)
Publication Number | Publication Date |
---|---|
GB281927A true GB281927A (en) | 1927-12-15 |
Family
ID=9968966
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1049927A Expired GB281927A (en) | 1927-04-19 | 1927-04-19 | Manufactures of esters of the cellulose series |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB281927A (en) |
-
1927
- 1927-04-19 GB GB1049927A patent/GB281927A/en not_active Expired
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