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:
Jun. 30, 2015
Filed:
Apr. 21, 2011
Yoshihiro Ichinose, Tokyo, JP;
Masanori Kobayashi, Tokyo, JP;
Tomoyoshi Koizumi, Tokyo, JP;
Mitsuhiro Matsuzaki, Tokyo, JP;
Yoshihiro Ichinose, Tokyo, JP;
Masanori Kobayashi, Tokyo, JP;
Tomoyoshi Koizumi, Tokyo, JP;
Mitsuhiro Matsuzaki, Tokyo, JP;
KUREHA CORPORATION, Tokyo, JP;
Abstract
Disclosed is a process for producing poly(arylene sulfide) which includes: a polymerization step of polymerizing a dihalogenated aromatic compound and at least one sulfur source selected from the group consisting of alkali metal sulfides and alkali metal hydrogen sulfides in an organic amide solvent, preferably in the presence of a phase separating agent; a separation step of separating a polymer from a reaction liquid containing a produced polymer after the polymerization step; a washing step of washing the polymer with a washing liquid that consists of water and/or an organic solvent; and a separated liquid treatment step of bringing both a separated liquid that has been recovered after the separation of the polymer in the separation step and a separated liquid containing a wash waste liquid that has been recovered after the separation of the polymer in the washing step into contact with an alkaline compound. Also disclosed is poly(arylene sulfide).