GB708968A - Improvements in the separation of the reaction products formed in the production of acrylonitrile from acetylene and hydrocyanic acid - Google Patents
Improvements in the separation of the reaction products formed in the production of acrylonitrile from acetylene and hydrocyanic acidInfo
- Publication number
- GB708968A GB708968A GB28697/51A GB2869751A GB708968A GB 708968 A GB708968 A GB 708968A GB 28697/51 A GB28697/51 A GB 28697/51A GB 2869751 A GB2869751 A GB 2869751A GB 708968 A GB708968 A GB 708968A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acrylonitrile
- acetylene
- washing
- ethylene glycol
- reaction chamber
- 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
- C07C253/00—Preparation of carboxylic acid nitriles
- C07C253/32—Separation; Purification; Stabilisation; Use of additives
- C07C253/34—Separation; Purification
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
In the production of acrylonitrile from acetylene and hydrocyanic acid in aqueous solution the gaseous mixture leaving the reaction chamber is washed with neutral organic liquid in which acrylonitrile and the by-products formed are soluble, which boils at at least 60 DEG C. and does not react with the components contained in the gas mixture nor impairs the formation of acrylonitrile in the reaction chamber. The residual gas being purified acetylene may be recycled to the reaction chamber. The washing liquor containing acrylonitrile and such by-products as mono-and di-vinyl acetylene, lactic acid nitrile and acetaldehyde and any unchanged hydrogen cyanide is then subjected to fractional distillation to recover the components therefrom. Specified washing liquids are aliphatic and cyclic hydrocarbons, halogenated hydrocarbons, alcohols, esters, ethers, acetals, nitriles and inert heterocyclic substances such as petroleum products, paraffin oil, toluene, xylene, tetrahydronaphthalene, methanol, ethanol, propanol, butanol, octanol, decanol, benzyl alcohol, ethylene glycol, trichlorethylene, tetrachlorethane, hexachlorbutane, chlorbenzene, butyl acetate, dibutyl phthalate, dioctyl phthalate, ethylene glycol acetate, monomethyl ethylene glycol ether, dioctyl ether, dibenzyl acetaldehyde butyl or octyl acetal, acrylonitrile, acetonitrile, propionitrile, lactonitrile, benzonitrile, tetrahydrofurane, g -butyrolactone and g -butyrolactam. The washing is preferably effected at between 0 DEG and 30 DEG C., the gas mixture leaving the chamber being cooled to room temperature prior to washing. When the washing liquids are water-soluble, the washed gases are preferably given a second wash with water to remove traces of the organic wash liquid. The washing may be effected in a packed tower, if desired under p increase pressure. Examples are given wherein acetylene and hydrogen cyanide are reacted in aqueous cuprous chloride solution.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE708968X | 1950-12-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB708968A true GB708968A (en) | 1954-05-12 |
Family
ID=6617752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB28697/51A Expired GB708968A (en) | 1950-12-09 | 1951-12-07 | Improvements in the separation of the reaction products formed in the production of acrylonitrile from acetylene and hydrocyanic acid |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB708968A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3201918A (en) * | 1960-08-12 | 1965-08-24 | Knapsack Ag | Process for separating acrylonitrile and ammonia from gaseous mixtures |
-
1951
- 1951-12-07 GB GB28697/51A patent/GB708968A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3201918A (en) * | 1960-08-12 | 1965-08-24 | Knapsack Ag | Process for separating acrylonitrile and ammonia from gaseous mixtures |
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