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    METHOD FOR PRODUCING POLYARYLENE SULPHIDE RESIN
    3.
    发明申请
    METHOD FOR PRODUCING POLYARYLENE SULPHIDE RESIN 有权

    公开(公告)号：US20210147630A1

    公开(公告)日：2021-05-20

    申请号：US16622964

    申请日：2018-06-26

    申请人： DIC Corporation

    发明人： Masaya Kadoki ,  Saori Nara ,  Taku Ibaraki ,  Hideki Watanabe ,  Satoshi Inoue

    IPC分类号： C08G75/0259 ,  C08G75/0254 ,  C08G75/0213 ,  C08J5/00 ,  C08J3/20

    摘要： Provided is a method for producing a polyarylene sulfide resin, the method including subjecting a dihaloaromatic compound and a sulfidizing agent to a polymerization reaction in the presence of an aliphatic cyclic compound having a ring openable by hydrolysis, in which corrosion of a production apparatus is suppressed. More particularly, provided is a method for producing a polyarylene sulfide resin, the method including a dehydration step (1) in which a water-containing sulfidizing agent and an aliphatic cyclic compound having a ring openable by hydrolysis are heated in the presence of a dihaloaromatic compound to a liquid temperature in the range of 90° C. or higher and 170° C. or lower under the atmospheric pressure, and then dehydration is performed while maintaining the liquid temperature and reducing the pressure to a pressure in the range of 30 [kPa abs] or higher and 80 [kPa abs] or lower to thus obtain a mixture.

    METHOD FOR PRODUCING GRANULAR POLYARYLENE SULFIDE AND GRANULAR POLYARYLENE SULFIDE
    5.
    发明申请
    METHOD FOR PRODUCING GRANULAR POLYARYLENE SULFIDE AND GRANULAR POLYARYLENE SULFIDE 审中-公开

    公开(公告)号：US20200024402A1

    公开(公告)日：2020-01-23

    申请号：US16481721

    申请日：2018-02-05

    申请人： Kureha Corporation

    发明人： Akihiro KONNO ,  Ken-ichi TAKAKI

    IPC分类号： C08G75/0209 ,  C08G75/0254

    摘要： To provide a method for producing granular polyarylene sulfide (hereinafter, PAS), the method capable of providing granular PAS having high particle strength and low melt viscosity in high yield without using special additives and the like; and granular PAS.A method according to the present invention is a method for producing granular PAS having a melt viscosity of from 1 to 30 Pa.s, which is measured at a temperature of 310° C. and a shear rate of 1216/s, by polymerizing a sulfur source and a dihalo aromatic compound in an organic amide solvent.

    Polyarylene sulfide production method and polyarylene sulfide production apparatus
    6.
    发明授权
    Polyarylene sulfide production method and polyarylene sulfide production apparatus 有权

    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.