Pervaporation Membrane Reactor for Producing Hydroxylamine Chloride via an Oxime Hydrolysis Reaction

A cost-effective route for the synthesis of hydroxylamine chloride (NH2OH·HCl) was proposed by combining ammoximation and oxime hydrolysis reactions (A–O–H route). This route is limited by low equilibrium conversion of oxime hydrolysis, which is a reversible reaction that produces ketone and NH2OH·H...

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Published inIndustrial & engineering chemistry research Vol. 54; no. 1; pp. 100 - 107
Main Authors Zhang, Weidong, Su, Xing, Hao, Zisu, Qin, Shaoli, Qing, Weihua, Xia, Chunjie
Format Journal Article
LanguageEnglish
Published American Chemical Society 14.01.2015
Subjects
Chlorides
Concentration (composition)
Conversion
Hydrolysis
Membranes
Oximes
Pervaporation
Reactors
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Summary:A cost-effective route for the synthesis of hydroxylamine chloride (NH2OH·HCl) was proposed by combining ammoximation and oxime hydrolysis reactions (A–O–H route). This route is limited by low equilibrium conversion of oxime hydrolysis, which is a reversible reaction that produces ketone and NH2OH·HCl. A pervaporation membrane reactor (PVMR) was recommended in this route for improving butanoxime hydrolysis conversion by in situ removal of byproduct butanone. Using a PDMS membrane, the effects of feed composition, temperature, and reactant concentration on the PVMR performance were investigated. An enhancement of conversion from about 20% to 84% was achieved. When using a high reactant concentration, NH2OH·HCl can be crystallized in the PVMR. The longtime experiment demonstrated that the membrane was stable in acidic and ionic environments in the reaction mixture.
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ISSN:0888-5885
1520-5045
DOI:10.1021/ie502811e