GB191303849A - Manufacture of Cellulose Esters Soluble in Ethyl Acetate. - Google Patents
Manufacture of Cellulose Esters Soluble in Ethyl Acetate.Info
- Publication number
- GB191303849A GB191303849A GB191303849DA GB191303849A GB 191303849 A GB191303849 A GB 191303849A GB 191303849D A GB191303849D A GB 191303849DA GB 191303849 A GB191303849 A GB 191303849A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ethyl acetate
- acetate
- soluble
- per cent
- heating
- 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
- C08B3/22—Post-esterification treatments, including purification
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)
- Compounds Of Unknown Constitution (AREA)
Abstract
3849. Verein fur Chemische Industrie in Mainz. Feb. 29, 1912, [Convention date]. Acetates.-Cellulose acetate soluble in ethyl acetate to a very viscous solution is prepared by heating a solution of cellulose acetate soluble in choroform or acetone, the solution containing water but no hydrolytically-acting substance. The heating is carried out at a high temperature, and is continued until a sample dissolves in ethyl acetate. In examples, the acetate is heated with 90-95 per cent acetic or formic acid to temperatures of 100-110‹ C. Or the crude mass of the acidylizing process may be treated directly, but in this case the contact substance must be rendered harmless by a suitable addition. For example, the crude mass is diluted with 50 per cent of acetic acid to bring the acetic acid present to 90 per cent strength, and sodium acetate is added to neutralize the action of the sulphuric acid used as contact agent, and the heating continued at 105-110‹ C. ; or if zinc chloride is used as the contact agent, ammonia is added with the acetic acid. The Specification as open to inspection under Section 91 (3) (a) refers also to the production of fatty acid esters of cellulose, other than cellulose acetate, soluble in ethyl acetate. This subject-matter does not appear in the Specification as accepted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB191319008D GB191319008A (en) | 1912-09-05 | 1913-08-21 | Improved Manufacture of Cellulose Esters. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE191303849X | 1912-02-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB191303849A true GB191303849A (en) | 1913-09-04 |
Family
ID=34354101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB191303849D Expired GB191303849A (en) | 1912-02-29 | 1913-08-21 | Manufacture of Cellulose Esters Soluble in Ethyl Acetate. |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB191303849A (en) |
-
1913
- 1913-08-21 GB GB191303849D patent/GB191303849A/en not_active Expired
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