GB746312A - Method for the purification of acrylonitrile - Google Patents
Method for the purification of acrylonitrileInfo
- Publication number
- GB746312A GB746312A GB7153/54A GB715354A GB746312A GB 746312 A GB746312 A GB 746312A GB 7153/54 A GB7153/54 A GB 7153/54A GB 715354 A GB715354 A GB 715354A GB 746312 A GB746312 A GB 746312A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acrylonitrile
- nitrosyl chloride
- acetylene
- polymers
- polymerization
- 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)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Synthetic acrylonitrile containing lower polymers of acetylene (e.g. trimers, tetramers) is purified by adding nitrosyl chloride to convert the impurities into high boiling derivatives, and then distilling off the acrylonitrile. The process is preferably carried out at room temperature with constant stirring, the nitrosyl chloride being introduced below the surface of the acrylonitrile in gaseous or liquid form. The mixture is then neutralized with an alkali before distillation. Any solid products formed can be removed by decantation or filtration. A polymerization inhibitor such as hydroquinone may be added. The process serves to remove acetylene polymers such as divinylacetylene and octatrienynes and also acetaldehyde resulting from the decomposition of lactonitrile. The product is acid-free and is stable to polymerization. Examples are given of the process.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR746312X | 1953-03-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB746312A true GB746312A (en) | 1956-03-14 |
Family
ID=9147281
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB7153/54A Expired GB746312A (en) | 1953-03-25 | 1954-03-11 | Method for the purification of acrylonitrile |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB746312A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1205084B (en) * | 1959-02-14 | 1965-11-18 | Edison Soc | Process for the purification of crude, aqueous acrylic acid nitrile, which is produced by the reaction of acetylene with hydrocyanic acid |
-
1954
- 1954-03-11 GB GB7153/54A patent/GB746312A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1205084B (en) * | 1959-02-14 | 1965-11-18 | Edison Soc | Process for the purification of crude, aqueous acrylic acid nitrile, which is produced by the reaction of acetylene with hydrocyanic acid |
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