GB706228A - Organic acid esters of cellulose - Google Patents
Organic acid esters of celluloseInfo
- Publication number
- GB706228A GB706228A GB29615/51A GB2961551A GB706228A GB 706228 A GB706228 A GB 706228A GB 29615/51 A GB29615/51 A GB 29615/51A GB 2961551 A GB2961551 A GB 2961551A GB 706228 A GB706228 A GB 706228A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cellulose
- acid
- acetate
- formaldehyde
- organic 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)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Good quality organic acid esters of cellulose are prepared from cellulose contaminated with hemicelluloses by first pretreating the cellulose with formaldehyde, or a substance capable of liberating formaldehyde such as paraformaldehyde, and an aliphatic acid of 1-4 carbon atoms, e.g., formic, acetic, propionic or n-butyric acid, or a mixture thereof. Formaldehyde may be applied before, after or simultaneously with the acid and preferably at a temperature below 45 DEG C. The acid may be applied in two or more stages as described in Specification 665,725 and formaldehyde may be present in any stage. The acid may also contain some of or all the catalyst, e.g., sulphuric acid, for the subsequent esterification. Esterification is conducted in known manner with an organic acid anhydride to produce, for example, cellulose acetate, propionate, butyrate, benzoate, acetate-stearate, acetate-propionate, acetate-butyrate and acetate-crotonate.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US706228XA | 1950-12-19 | 1950-12-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB706228A true GB706228A (en) | 1954-03-24 |
Family
ID=22096409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB29615/51A Expired GB706228A (en) | 1950-12-19 | 1951-12-18 | Organic acid esters of cellulose |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB706228A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0626391A1 (en) * | 1992-02-28 | 1994-11-30 | Daicel Chemical Industries, Ltd. | Process for producing cellulose acetate |
-
1951
- 1951-12-18 GB GB29615/51A patent/GB706228A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0626391A1 (en) * | 1992-02-28 | 1994-11-30 | Daicel Chemical Industries, Ltd. | Process for producing cellulose acetate |
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