GB402692A - Improvements relating to the production of cellulose triacetate - Google Patents
Improvements relating to the production of cellulose triacetateInfo
- Publication number
- GB402692A GB402692A GB1801333A GB1801333A GB402692A GB 402692 A GB402692 A GB 402692A GB 1801333 A GB1801333 A GB 1801333A GB 1801333 A GB1801333 A GB 1801333A GB 402692 A GB402692 A GB 402692A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cellulose
- acetylating
- catalyst
- large proportion
- cellulose triacetate
- 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
The process described in the parent Specification, which consists in first treating the cellulose with glacial acetic acid containing a small amount of catalyst, withdrawing a large proportion of the acid and catalyst, and acetylating at low temperature with excess of acetic anhydride and a large proportion of a substance having the property of not dissolving cellulose acetate but of swelling it, is modified by passing the pretreating liquor and/or the acetylating liquor intermittently or continuously through the cellulose whilst the latter is kept in a quiescent state, for example, by supporting it on one or more perforated plates. The final product, which is cellulose triacetate in fibrous form, may be treated with a warm neutral salt solution, e.g. a 2 per cent solution of sodium sulphate at 80 DEG C., to render it stable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1801333A GB402692A (en) | 1933-06-23 | 1933-06-23 | Improvements relating to the production of cellulose triacetate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1801333A GB402692A (en) | 1933-06-23 | 1933-06-23 | Improvements relating to the production of cellulose triacetate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB402692A true GB402692A (en) | 1933-12-07 |
Family
ID=10105129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1801333A Expired GB402692A (en) | 1933-06-23 | 1933-06-23 | Improvements relating to the production of cellulose triacetate |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB402692A (en) |
-
1933
- 1933-06-23 GB GB1801333A patent/GB402692A/en not_active Expired
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