GB264181A - - Google Patents
Info
- Publication number
- GB264181A GB264181A GB703/27A GB70327A GB264181A GB 264181 A GB264181 A GB 264181A GB 703/27 A GB703/27 A GB 703/27A GB 70327 A GB70327 A GB 70327A GB 264181 A GB264181 A GB 264181A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cellulose
- treatment
- per cent
- acid
- sulphuric 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
- C08B1/00—Preparatory treatment of cellulose for making derivatives thereof, e.g. pre-treatment, pre-soaking, activation
- C08B1/02—Rendering cellulose suitable for esterification
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)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Abstract
264,181. Soc. Lyonnaise de Soie Artificielle, and Chevalet, P. A. A. Jan. 11, 1926, [Convention date]. Cellulose acetates; preparatory treatment of cellulose.-Cellulose is rendered active and capable of producing acetates giving viscous solutions by treatment at ordinary temperature or in the cold, with 80-90 per cent formic acid to which has been added sulphuric acid or zinc chloride in proportion less than 10 per cent of the whole mixture. This treatment avoids depolymerization of the cellulose molecule. The bath may be prepared by treating sodium formate with sulphuric acid. After treatment with the acid, the excess of the latter is removed, and the product is washed and dried. When using cellulose which has been pretreated in this manner, only traces of sulphuric acid are required to effect acetylation. The Specification as open to inspection under Sect. 91 (3) (a) refers to the use of 100 per cent formic acid without any addition. This subjectmatter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR264181T | 1926-01-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB264181A true GB264181A (en) | 1928-02-02 |
Family
ID=31897721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB703/27A Expired GB264181A (en) | 1926-01-11 | 1927-01-10 |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB264181A (en) |
-
1927
- 1927-01-10 GB GB703/27A patent/GB264181A/en not_active Expired
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