GB777083A - Process for obtaining partly frozen mixtures of lower aliphatic acids and anhydrides - Google Patents
Process for obtaining partly frozen mixtures of lower aliphatic acids and anhydridesInfo
- Publication number
- GB777083A GB777083A GB6165/55A GB616555A GB777083A GB 777083 A GB777083 A GB 777083A GB 6165/55 A GB6165/55 A GB 6165/55A GB 616555 A GB616555 A GB 616555A GB 777083 A GB777083 A GB 777083A
- Authority
- GB
- United Kingdom
- Prior art keywords
- anhydride
- acid
- production
- lower aliphatic
- mixtures
- 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
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C53/00—Saturated compounds having only one carboxyl group bound to an acyclic carbon atom or hydrogen
- C07C53/12—Acetic anhydride
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C53/00—Saturated compounds having only one carboxyl group bound to an acyclic carbon atom or hydrogen
- C07C53/08—Acetic acid
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C53/00—Saturated compounds having only one carboxyl group bound to an acyclic carbon atom or hydrogen
- C07C53/122—Propionic acid
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C53/00—Saturated compounds having only one carboxyl group bound to an acyclic carbon atom or hydrogen
- C07C53/124—Acids containing four carbon atoms
-
- 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)
- Organic Chemistry (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)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Abstract
A process for the production of a partly frozen mixture of a lower aliphatic acid (defined as an aliphatic acid containing up to 4 carbon atoms in the molecule) and a lower aliphatic acid anhydride, suitable for use in the production of cellulose esters, comprises cooling the acid in the absence of the anhydride, or in the presence of less anhydride than is required in the final mixture, until the acid is partly or completely frozen, and then adding sufficient liquid anhydride to cause some of the solid acid to melt and yield a final mixture of the desired composition. Preferably the anhydride added to the solid acid is at a temperature not higher than that of the acid. The process is particularly of use for mixtures which are finally to contain more than 20 per cent of anhydride, and it may also be employed where the anhydride is derived from a different acid from the one with which it is to be mixed. Examples are given of the production of acetic acid-acetic anhydride mixtures.ALSO:A process for the production of a partly frozen mixture of a lower aliphatic acid (defined as an aliphatic acid containing up to 4 carbon atoms in the molecule) and a lower aliphatic acid anhydride, suitable for use in the production of cellulose esters, comprises cooling the acid in the absence of the anhydride, or in the presence of less anhydride than is required in the final mixture, until the acid is partly or completely frozen, and then adding sufficient liquid anhydride to cause some of the solid acid to melt and yield a final mixture of the desired composition. Preferably the anhydride added to the solid acid is at a temperature not higher than that of the acid. The process is particularly of use for mixtures which are finally to contain more than 20 per cent of anhydride, and it may also be employed where the anhydride is derived from a different acid from the one with which it is to be mixed. Examples are given of the production of acetic acid-acetic anhydride mixtures.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US777083XA | 1954-03-04 | 1954-03-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB777083A true GB777083A (en) | 1957-06-19 |
Family
ID=22139618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB6165/55A Expired GB777083A (en) | 1954-03-04 | 1955-03-02 | Process for obtaining partly frozen mixtures of lower aliphatic acids and anhydrides |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB777083A (en) |
-
1955
- 1955-03-02 GB GB6165/55A patent/GB777083A/en not_active Expired
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