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
GB18404/54A
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.)
Montedison SpA
Original Assignee
Montedison SpA
Montecatini Societa Generale per lIndustria Mineraria e Chimica SpA
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Application filed by Montedison SpA, Montecatini Societa Generale per lIndustria Mineraria e Chimica SpAfiledCriticalMontedison SpA
Publication of GB758577ApublicationCriticalpatent/GB758577A/en
C07C253/00—Preparation of carboxylic acid nitriles
C07C253/32—Separation; Purification; Stabilisation; Use of additives
C07C253/34—Separation; Purification
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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
Acrylonitrile containing acetylene polymers (such as divinylacetylene and ethynylbutadiene) is purified by effecting selective catalytic hydrogenation of said polymers with a Raney metal or noble metal at temperature from 0 DEG to 50 DEG C. in an atmosphere of hydrogen under a pressure of from 1 to 20 atmospheres and separating pure acrylonitrile from the hydrogenation product by fractional distillation. The catalyst may comprise Raney nickel or cobalt suspended in the nitrile to be treated, or platinum or palladium supported upon an inert stationary carrier in a catalysis chamber. Specification 557,436, [Group IV], is referred to.
GB18404/54A1953-07-081954-06-23Process for purifying acrylonitrile from acetylene hydrocarbons
ExpiredGB758577A
(en)
The continuous procedure for the catalytic hydrogenation of an aromatic polynitro compound. (Machine-translation by Google Translate, not legally binding)
A continuous procedure for the catalytic hydrogenation of an aromatic polynitro compound. (Machine-translation by Google Translate, not legally binding)