GB746312A - Method for the purification of acrylonitrile - Google Patents

Method for the purification of acrylonitrile

Info

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
Application number
GB7153/54A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DERIVES de l ACETYLENE S I D A
Original Assignee
DERIVES de l ACETYLENE S I D A
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by DERIVES de l ACETYLENE S I D A filed Critical DERIVES de l ACETYLENE S I D A
Publication of GB746312A publication Critical patent/GB746312A/en
Expired legal-status Critical Current

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)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (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.
GB7153/54A 1953-03-25 1954-03-11 Method for the purification of acrylonitrile Expired GB746312A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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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