GB387533A - Process for the preparation of a new type of fibrous cellulose acetates - Google Patents
Process for the preparation of a new type of fibrous cellulose acetatesInfo
- Publication number
- GB387533A GB387533A GB8819/32A GB881932A GB387533A GB 387533 A GB387533 A GB 387533A GB 8819/32 A GB8819/32 A GB 8819/32A GB 881932 A GB881932 A GB 881932A GB 387533 A GB387533 A GB 387533A
- Authority
- GB
- United Kingdom
- Prior art keywords
- perchlorate
- sulphur dioxide
- acetic anhydride
- cellulose
- 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
- C08B3/20—Esterification with maintenance of the fibrous structure of the cellulose
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
Cellulose is acetylated in the presence of a non-solvent and sulphur dioxide, using perchloric acid as catalyst. The temperature is kept below about 40 DEG C. Instead of perchloric acid itself there may be used its salts with weak bases, e.g. magnesium perchlorate, or zinc perchlorate, or its salts together with free acids. In examples, cotton linters pretreated with glacial acetic acid are acetylated in a bath comprising (1) acetic anhydride, toluene, sulphur dioxide, and perchloric acid, (2) acetic anhydride, toluene, sulphur dioxide, and zinc perchlorate, and (3) acetic anhydride, benzene, sulphur dioxide, sodium perchlorate and phosphoric acid. As catalyst there may also be used a mixture of lithium perchlorate and phosphoric acid. The fibrous cellulose triacetates, if desired, after converting to an acetone soluble form, e.g. by the process of Specification 355,419, may be employed in the production of artificial silk, films, foils, insulating materials, plastic masses, lacquers, or the like. Specifications 312,242, [Class 2 (ii), Cellulose &c.], and 363,700 also are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE387533X | 1931-03-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB387533A true GB387533A (en) | 1933-02-09 |
Family
ID=6371139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8819/32A Expired GB387533A (en) | 1931-03-24 | 1932-03-24 | Process for the preparation of a new type of fibrous cellulose acetates |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB387533A (en) |
-
1932
- 1932-03-24 GB GB8819/32A patent/GB387533A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB387533A (en) | Process for the preparation of a new type of fibrous cellulose acetates | |
| GB340325A (en) | Improvements in the production of artificial materials by wet spinning processes from solutions of organic derivatives of cellulose | |
| US2122572A (en) | Manufacture of cellulose derivatives | |
| US2539586A (en) | Preparation of cellulose esters | |
| GB527565A (en) | A direct process for producing acetyl cellulose soluble in various organic solvents | |
| GB396657A (en) | Process for the manufacture of cellulose esters | |
| US2461572A (en) | Process of ripening cellulose esters | |
| GB399508A (en) | Improvements in cellulosic materials | |
| GB581157A (en) | Improvements in or relating to the production of organic esters of cellulose | |
| GB652543A (en) | Improvements in the manufacture of cellulose esters | |
| GB396575A (en) | Process for the preparation of a new type of fibrous cellulose ester | |
| GB568439A (en) | Improvements in the production of cellulose esters | |
| GB521884A (en) | Improvements in or relating to the manufacture of cellulose esters | |
| GB381991A (en) | Improvements relating to the production of cellulose triacetate | |
| GB467160A (en) | Improvement in high viscosity organic esters of cellulose and process of preparing them | |
| GB294415A (en) | Improvements in the manufacture of cellulose acetate | |
| GB713386A (en) | Production of cellulose derivatives | |
| GB410118A (en) | Manufacture of organic esters of cellulose and its derivatives | |
| GB681865A (en) | Preparation of cellulose esters | |
| GB449066A (en) | Improvements in method of making organic esters of cellulose | |
| GB571954A (en) | Improvements in or relating to the production of artificial textile materials, foilsand the like | |
| GB419763A (en) | Manufacture of cellulose esters | |
| GB226309A (en) | Improvements in the manufacture of cellulose acetate | |
| GB411501A (en) | Improvements in or relating to the production of new compositions of matter by the esterification of cellulosic material | |
| GB413368A (en) | Improvements relating to the manufacture from cellulose esters of artificial products, such as artificial silk, films, plastic masses, intermediate layers for safety glass, laquers and the like |