GB381991A - Improvements relating to the production of cellulose triacetate - Google Patents
Improvements relating to the production of cellulose triacetateInfo
- Publication number
- GB381991A GB381991A GB2227431A GB2227431A GB381991A GB 381991 A GB381991 A GB 381991A GB 2227431 A GB2227431 A GB 2227431A GB 2227431 A GB2227431 A GB 2227431A GB 381991 A GB381991 A GB 381991A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cellulose
- catalyst
- removal
- production
- acetic acid
- 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
- C08B3/06—Cellulose acetate, e.g. mono-acetate, di-acetate or tri-acetate
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
Highly acetylated cellulose acetates are produced by a process involving the pretreatment of the cellulose with glacial acetic acid containing a small proportion (e.g. 0,3 per cent) of a catalyst such as sulphuric acid, the removal of a large proportion of the acetic acid and catalyst, and esterification (preferably at 0 DEG C.) with an excess of acetic anhydride and a large proportion of a substance or mixture of substances having the property of not dissolving the cellulose acetate but of swelling it. After removal of the esterifying bath, the product is substantially free from catalyst. An example is given in which benzene is the diluent used. The products, consisting of cellulose triacetates, may be worked up with softening agents into films, threads, pressed articles, &c.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2227431A GB381991A (en) | 1931-08-06 | 1931-08-06 | Improvements relating to the production of cellulose triacetate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2227431A GB381991A (en) | 1931-08-06 | 1931-08-06 | Improvements relating to the production of cellulose triacetate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB381991A true GB381991A (en) | 1932-10-20 |
Family
ID=10176714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2227431A Expired GB381991A (en) | 1931-08-06 | 1931-08-06 | Improvements relating to the production of cellulose triacetate |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB381991A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2585516A (en) * | 1948-03-23 | 1952-02-12 | Du Pont | Preparation of impregnated cellulose and cellulose esters therefrom |
| US2772944A (en) * | 1953-03-27 | 1956-12-04 | American Viscose Corp | Process for the acetylation of regenerated cellulose fibers and product resulting therefrom |
-
1931
- 1931-08-06 GB GB2227431A patent/GB381991A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2585516A (en) * | 1948-03-23 | 1952-02-12 | Du Pont | Preparation of impregnated cellulose and cellulose esters therefrom |
| US2772944A (en) * | 1953-03-27 | 1956-12-04 | American Viscose Corp | Process for the acetylation of regenerated cellulose fibers and product resulting therefrom |
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