GB405825A - Improvements relating to the production of cellulose acetate - Google Patents
Improvements relating to the production of cellulose acetateInfo
- Publication number
- GB405825A GB405825A GB1021233A GB1021233A GB405825A GB 405825 A GB405825 A GB 405825A GB 1021233 A GB1021233 A GB 1021233A GB 1021233 A GB1021233 A GB 1021233A GB 405825 A GB405825 A GB 405825A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- cellulose
- acetic
- perchloric
- benzene
- 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
Complex bodies comprising perchloric acid and another inorganic acid containing oxygen, e.g., chromic acid, phosphoric acid, sulphuric acid, or boric acid, are employed as contact substances in conjunction with acetic acid during the preliminary stage or stages in the acetylation of cellulose. In one example, the cellulose is treated in acetic acid containing 0.2 per cent of perchloric acid (on the weight of the cellulose), present as a complex body comprising perchloric acid and chromic acid, and is then removed and acetylated in a mixture of acetic anhydride and benzene. In another example, cellulose is pretreated with dilute sulphuric acid, the bulk of which is then separated off, and strong acetic acid containing 0.35 per cent of barium perchlorate is added. The liquid is then removed and the cellulose acetylated in acetic anhydride and benzene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1021233A GB405825A (en) | 1933-04-05 | 1933-04-05 | Improvements relating to the production of cellulose acetate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1021233A GB405825A (en) | 1933-04-05 | 1933-04-05 | Improvements relating to the production of cellulose acetate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB405825A true GB405825A (en) | 1934-02-15 |
Family
ID=9963648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1021233A Expired GB405825A (en) | 1933-04-05 | 1933-04-05 | Improvements relating to the production of cellulose acetate |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB405825A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2429645A (en) * | 1940-08-08 | 1947-10-28 | Joseph G Denny Jr | Art of esterification |
| US2429643A (en) * | 1939-08-11 | 1947-10-28 | Joseph G Denny Jr | Art of esterification |
| US2429644A (en) * | 1940-08-08 | 1947-10-28 | Joseph G Denny Jr | Art of esterification |
-
1933
- 1933-04-05 GB GB1021233A patent/GB405825A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2429643A (en) * | 1939-08-11 | 1947-10-28 | Joseph G Denny Jr | Art of esterification |
| US2429645A (en) * | 1940-08-08 | 1947-10-28 | Joseph G Denny Jr | Art of esterification |
| US2429644A (en) * | 1940-08-08 | 1947-10-28 | Joseph G Denny Jr | Art of esterification |
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