公开(公告)号：US09908974B2

公开(公告)日：2018-03-06

申请号：US15303032

申请日：2015-04-21

申请人： Kureha Corporation

发明人： Masanori Kobayashi ,  Tomoyoshi Koizumi ,  Mitsuhiro Matsuzaki ,  Hirohito Kawama

IPC分类号： C08G75/04 ,  C08G75/0281 ,  C08G75/0254 ,  C08G75/0213 ,  B01D29/11 ,  B01D29/66 ,  B08B3/04 ,  C08G75/0209 ,  C08G75/0259

CPC分类号： C08G75/0281 ,  B01D29/11 ,  B01D29/66 ,  B08B3/04 ,  C08G75/0209 ,  C08G75/0213 ,  C08G75/0254 ,  C08G75/0259 ,  C08G75/04

摘要： The present invention provides a production method and a production apparatus for a polyarylene sulfide (PAS), thus the formation of a floating polymer and the leakage of the floating polymer to the outside of the vessel in a washing step are prevented, to achieve steady production of the polymer with high quality, to improve the yield of the polymer and to reduce environmental load, wherein the floating polymer refers to a particles of the polymer which are floating on the surface of a washing solution, in the upper part of the inside of a washing vessel, as a result of the adhesion of a gas onto the surface of the particles of the polymer.The present invention provides a production method for a PAS comprising step (I), performing polymerization, step (II), separating and collecting a polymer, step (III), washing a slurry, and step (IV), collecting the polymer after washing, wherein an aqueous medium is sprayed onto a PAS floating on the surface of the aqueous washing solution in the upper part of the inside of the washing vessel in step (III) (step (IIIa), washing a slurry using a counter current, and/or step (IIIb), treating a slurry with acid using a counter current, or the like); and a production apparatus for a PAS comprising a washing device (counter current washing device and/or a counter current contact/acid treatment device or the like) having an aqueous medium spray means.