The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 15, 2015
Filed:
Nov. 20, 2012
Mitsui Chemicals, Inc., Minato-ku, JP;
MITSUI CHEMICALS, INC., Tokyo, JP;
Abstract
A process for preparing β-mercaptocarboxylic acid is provided with Step a for reacting a compound represented by a formula: XS or a compound represented by a formula: XSH, alkali hydroxide represented by a formula: XOH (the X groups being defined), and unsaturated carboxylic acid represented by the following General Formula (1) to obtain a reaction solution including a compound represented by the following General Formula (2) and a compound represented by the following General Formula (3), Step b for neutralizing the reaction solution obtained in Step a with an acid to obtain a reaction solution including β-mercaptocarboxylic acid represented by the following General Formula (4) and a compound represented by the following General Formula (5), Step c for distillation-refining the reaction solution obtained in Step b to obtain the β-mercaptocarboxylic acid, and Step d for returning a distillation residue in Step c to Step a.