公开(公告)号：US5167775A

公开(公告)日：1992-12-01

申请号：US422172

申请日：1989-10-16

申请人： Masao Omori ,  Yoshinari Koyama ,  Daigo Shirota

发明人： Masao Omori ,  Yoshinari Koyama ,  Daigo Shirota

IPC分类号： B01D3/00 ,  B01D3/06 ,  C08G75/02 ,  C08G75/06

CPC分类号： B01D3/06 ,  C08G75/0281 ,  Y10S203/09 ,  Y10S203/20

摘要： The present invention provides a method for the recover of a solvent used in the production of a polyarylene sulfide according to which the deterioration of the solvent is low and the recovery rate is high, wherein a mixed liquid, mainly composed of the solvent used in the production of the polyarylene sulfide, and generated from the process of producing the polyarylene sulfide, is subjected to a flash evaporating operation to separate the mixed liquid into a flashed vapor (A) and a flashed residue (B), and then the flashed vapor is rectified (A).

公开(公告)号：US5194580A

公开(公告)日：1993-03-16

申请号：US387920

申请日：1989-08-01

申请人： Yoshinari Koyama ,  Daigo Shirota ,  Masao Ohmori ,  Minoru Senga

发明人： Yoshinari Koyama ,  Daigo Shirota ,  Masao Ohmori ,  Minoru Senga

IPC分类号： C08G75/02

CPC分类号： C08G75/025

摘要： A process for preparing a polyarylene sulfide involves dehydrating a mixture of a hydrous sulfur source and an organic polar solvent under a reduced pressure in a rectification tower and contacting a dihalogen aromatic compound with a dehydrated sulfur source in the organic polar solvent.This process provides the polyarylene sulfide with a white color and a higher molecular weight.

公开(公告)号：US5143554A

公开(公告)日：1992-09-01

申请号：US571477

申请日：1990-08-23

申请人： Yoshinari Koyama ,  Daigo Shirota

发明人： Yoshinari Koyama ,  Daigo Shirota

IPC分类号： B08B3/04 ,  B29B7/32 ,  B29B13/00 ,  B29B15/00 ,  B29B15/06 ,  B29B17/02 ,  C08G75/02 ,  C08G75/06

CPC分类号： B29B13/00 ,  C08F6/008 ,  C08F6/28 ,  C08G75/0204 ,  C08G75/025

摘要： A process for washing a powdery and/or granular resin involves bringing the powdery and/or granular resin into contact with a washing liquid in a counterflow fashion in a tubular body with a plurality of static mixing elements disposed continuously in series, thereby removing impurities adhering to the powdery and/or granular resin and producing the powdery and/or granular resin with a less content of impurities. A washing device for use with the washing process contains a tubular body in which the static mixing elements are disposed continuously in series, and this construction is simpler than conventional ones and does not require a stirring power and mechanism to remove the impurities from the powdery and/or granular resin.

公开(公告)号：US4919911A

公开(公告)日：1990-04-24

申请号：US285031

申请日：1988-12-16

申请人： Daigo Shirota ,  Masao Omori ,  Hiroyasu Yamato ,  Norio Ogata

发明人： Daigo Shirota ,  Masao Omori ,  Hiroyasu Yamato ,  Norio Ogata

IPC分类号： C01D15/04 ,  C08G75/02 ,  C08G75/06

CPC分类号： C01D15/04 ,  C08G75/0281

摘要： The present invention provides a method of recovering a lithium chloride, which comprises reacting a dihalogenated aromatic compound and an alkali metal sulfide and/or alkali metal hydrogen sulfide in a polar solvent under the pressure of lithium chloride, separating a solvent insoluble component from the resultant reaction mixture to obtain a solution, and calcinating a residue obtained by removing volatile substances from the resultant solution, as well as a method of recovering a lithium chloride, which comprises reacting a dihalogenated aromatic compound and an alkali metal sulfide and/or alkali metal hydrogen sulfide in a polar solvent under the pressure of lithium chloride, separating the granular polymer ingredient from the resultant reaction mixture subjecting the liquid suspension obtained by said separation to solid-liquid separation and calcinating the residue obtained by removing volatile substances from the resultant solution component.

公开(公告)号：US06646105B2

公开(公告)日：2003-11-11

申请号：US10105368

申请日：2002-03-26

申请人： Daigo Shirota

发明人： Daigo Shirota

IPC分类号： C08G7514

CPC分类号： C07D207/267 ,  C08G75/0277

摘要： There is disclosed a process for treating a by-product salt from a polyarylene sulfide which comprises treating a solid mixture containing an aprotic organic solvent and the by-product salt that is formed in the case of producing the polyarylene sulfide by subjecting an alkali metal sulfide and a dihalogenated aromatic compound to polymerization condensation reaction in the aprotic organic solvent, characterized in that the aprotic organic solvent is recovered by dry treating the solid mixture by the use of a dryer having a self-cleaning property. It is enabled by the above process to efficiently recover the aprotic organic solvent, and thereby produce the objective polyarylene sulfide at a lower cost.

公开(公告)号：US06939942B2

公开(公告)日：2005-09-06

申请号：US10473450

申请日：2002-03-14

申请人： Daigo Shirota

发明人： Daigo Shirota

IPC分类号： C08G75/02 ,  C08F6/00

CPC分类号： C08G75/025 ,  C08G75/0254 ,  C08G75/0281

摘要： There is disclosed a process for treating a by-product salt of a polyarylene sulfide which comprises subjecting solid matter containing an aprotic organic solvent and the by-product salt that is formed in the case of producing a polyarylene sulfide by polymerization condensation reaction of an alkali metal sulfide and a dihalogenated aromatic compound in the aprotic organic solvent to a drying treatment followed by a firing treatment of the resultant dryingly treated matter at a temperature in the range of 500 to 1000° C. The above process is capable of enhancing the solubility in water, of the by-product salt comprising sodium chloride as the principal component in the production of polyarylene sulfide, and affording waste water which is lowered in SS and COD in the case where the by-product salt is dissolved in water and is discharged as waste water.

摘要翻译： 公开了一种处理聚芳硫醚的副产物盐的方法，该方法包括使含有非质子性有机溶剂的固体物质和在通过碱的聚合缩合反应制备聚芳硫醚的情况下形成的副产物盐 金属硫化物和二卤代芳香族化合物进行干燥处理，然后在500〜1000℃的温度范围内对得到的干燥处理物进行烧成处理。上述方法能够提高在 水，其中包含氯化钠作为生产聚芳硫醚的主要成分的副产物盐，并且在副产物盐溶解在水中并被排出的情况下提供SS和COD降低的废水 废水。