Vertical countercurrent solid-liquid contact method, method for washing solid particles, method for producing polyarylene sulfide, and device therefor

A technology of polyarylene sulfide and solid particles, applied in cleaning methods and utensils, cleaning methods using liquids, chemical instruments and methods, etc., can solve the problem of changes in the treatment efficiency of solid-liquid counterflow contact and the uneven settling velocity of solid particles Uniformity and other issues, to achieve the effect of continuous opposite flow contact and full cleaning effect

Inactive Publication Date: 2013-01-23
KUREHA KAGAKU KOGYO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is also found that the viscosity of the liquid phase in the middle stirring chamber will cause the sedimentation velocity of the solid particles to be uneven, and the efficiency of the solid-liquid counterflow contact treatment will be changed.

Method used

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  • Vertical countercurrent solid-liquid contact method, method for washing solid particles, method for producing polyarylene sulfide, and device therefor
  • Vertical countercurrent solid-liquid contact method, method for washing solid particles, method for producing polyarylene sulfide, and device therefor
  • Vertical countercurrent solid-liquid contact method, method for washing solid particles, method for producing polyarylene sulfide, and device therefor

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Experimental program
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Effect test

Embodiment 1

[0152] use figure 1 In the vertical solid-liquid counterflow contact device with the structure shown, the aqueous slurry (PPS slurry) containing PPS particles is washed with ion-exchanged water.

[0153] The PPS slurry used in the Examples and Comparative Examples is obtained by separating the PPS particles from the reaction liquid containing the PPS polymer after the polymerization reaction, and then washing with acetone, and using the recovered PPS particles with a specified ratio of Aqueous acetone solution formed from acetone and water was reslurried to prepare.

[0154] The vertical solid-liquid counterflow contact device mainly consists of a main body 2 and a bottom 3 made of an acrylic resin plate with an inner diameter of 310mm, the interior of which can be seen through.

[0155] The main body part 2 is divided into stirring chambers 21-25 which are five contact processing chambers. Each stirring chamber is: inner diameter D=310mm, height H=116.3mm (H / D=0.375). An a...

Embodiment 2

[0166] Except that the temperature control unit was not installed on the outer peripheral surface of the liquid supply flow path 92, a vertical solid-liquid counterflow contact device with the same structure as in Example 1 was used to wash the PPS slurry with ion-exchanged water. The temperature of the ion-exchanged water supplied through the liquid supply channel 92 is 26° C., which is close to the outside air temperature in summer.

[0167] Using this vertical counterflow contact device, the stirring shaft 6 was rotated at a stirring speed of 15 rpm. In this stirred state, 550 kg / h of PPS slurry adjusted to a temperature of 40° C. by the temperature control unit was supplied through the solid particle supply flow path 91, and 600 kg / h of ion-exchanged water was supplied through the liquid supply flow path 92 at such ratios. The viscosity of the liquid phase was 1.10 mPa·s, and the viscosity of the ion-exchanged water was 1.08 mPa·s.

[0168] The washing effluent as the upp...

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Abstract

Disclosed is a vertical countercurrent solid-liquid contact method, which comprises supplying an aqueous slurry containing solid particles from an upper position and allowing the aqueous slurry to flow downward through multiple contact chambers, said contact chambers being vertically connected to each other, while feeding a liquid to be contacted from a lower position and allowing the liquid to flow upward through the aforesaid contact chambers being vertically connected to each other, thereby continuously countercurrent contacting said aqueous slurry with said liquid to be contacted, or a device therefor, wherein the viscosity of the liquid phase in at least one contact chamber is controlled. Specifically disclosed is the aforesaid method or device, wherein the viscosity eta1 of the liquid phase in the contact chamber located at the uppermost position is controlled so that eta1 satisfies the requirement: 0.9=1 / eta0=2.0 [wherein eta0 represents the standard viscosity at a preset standard temperature and at the standard composition of the liquid phase].

Description

technical field [0001] The invention relates to a vertical solid-liquid counterflow contact method and a vertical solid-liquid counterflow contact device for solid particle and liquid counterflow contact treatment. In more detail, the present invention relates to a vertical solid-liquid counterflow contact method that uses a vertical solid-liquid counterflow contact device configured with a plurality of contact treatment chambers to achieve good uniformity of solid-liquid flow and high contact efficiency. A method for cleaning solid particles, a vertical solid-liquid counterflow contact device used in the method, a device for cleaning solid particles, and the like. [0002] The vertical solid-liquid counterflow contact method and the vertical solid-liquid counterflow contact device of the present invention can make the solid particle flow and the liquid flow evenly and effectively continuous counterflow contact treatment, so it can be used in the cleaning of solid particles, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/12C08G75/02C08G75/025
CPCB01J2219/00779B01J19/0066B01J19/18B01J2219/00765B01J8/10C08G75/025B08B3/041B01J8/12C08G75/02
Inventor 小林正则河间博仁铃木孝一松崎光浩
Owner KUREHA KAGAKU KOGYO KK
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