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Air Liquide SA
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Air Liquide SA
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Application filed by Air Liquide SAfiledCriticalAir Liquide SA
Priority to FR6911411ApriorityCriticalpatent/FR2040797A5/en
Application grantedgrantedCritical
Publication of FR2040797A5publicationCriticalpatent/FR2040797A5/en
Organic Low-Molecular-Weight Compounds And Preparation Thereof
(AREA)
Abstract
Title acids is prepd by reacting H2O2 and thiourea suspended in a solvent mixture, which is pref. a mixt. of CCl4 and CH2ClCH2Clin proportions giving a solvent density of ca. 1.405, and in which the thiourea and title acid is insoluble. Pref. reaction is at 0-7 degrees C as reaction is very exothermic. An increased yield of very pure product is obtained which is easily dried, partic has good storage properties.