GB489634A - A method of counteracting the polymerisation of vinyl-methyl ketone during distillation or storage - Google Patents
A method of counteracting the polymerisation of vinyl-methyl ketone during distillation or storageInfo
- Publication number
- GB489634A GB489634A GB265937A GB265937A GB489634A GB 489634 A GB489634 A GB 489634A GB 265937 A GB265937 A GB 265937A GB 265937 A GB265937 A GB 265937A GB 489634 A GB489634 A GB 489634A
- Authority
- GB
- United Kingdom
- Prior art keywords
- methyl ketone
- vinyl methyl
- acid
- storage
- distillation
- 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
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/78—Separation; Purification; Stabilisation; Use of additives
- C07C45/81—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation
- C07C45/82—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation by distillation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/78—Separation; Purification; Stabilisation; Use of additives
- C07C45/86—Use of additives, e.g. for stabilisation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Polymerization of vinyl methyl ketone during distillation or storage is counteracted by performing the distillation, advantageously under atmospheric pressure, in the presence of a free unsulphonated organic acid soluble in water and in vinyl methyl ketone, or by adding to the ketone before storage a quantity of such acid sufficient to ensure the presence of free acid. A stabilizing agent such as hydroquinone or a copper salt may also be added. The invention is applicable to the separation of mixtures of vinyl methyl ketone and a hydrocarbon, especially vinylacetylene, by distillation. In examples: (1) and (3) acetic acid is added to vinyl methyl ketone and the mixture is distilled; (2) formic acid is similarly employed; (4) acetic acid is added to a mixture of vinyl methyl ketone and vinylacetylene, which is then fractionated by introducing it into the middle of a column heated to 80 DEG C. Other aliphatic carboxylic acids of low molecular weight, e.g. propionic, butyric or glycollic acid, may also be used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB265937A GB489634A (en) | 1937-01-29 | 1937-01-29 | A method of counteracting the polymerisation of vinyl-methyl ketone during distillation or storage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB265937A GB489634A (en) | 1937-01-29 | 1937-01-29 | A method of counteracting the polymerisation of vinyl-methyl ketone during distillation or storage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB489634A true GB489634A (en) | 1938-07-29 |
Family
ID=9743480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB265937A Expired GB489634A (en) | 1937-01-29 | 1937-01-29 | A method of counteracting the polymerisation of vinyl-methyl ketone during distillation or storage |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB489634A (en) |
-
1937
- 1937-01-29 GB GB265937A patent/GB489634A/en not_active Expired
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