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Method and device for condensing rubber polymer

A technology of rubber polymer and coagulation kettle, which is applied in the field of polymer reprocessing, can solve the problems of poor solvent removal rate and high energy consumption, and achieve the effects of improving solvent recovery rate, reducing pollution and reducing solvent content

Active Publication Date: 2018-03-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of rubber polymer coagulation process or high energy consumption and poor solvent removal rate in the prior art, and provide a method and device for rubber polymer coagulation

Method used

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  • Method and device for condensing rubber polymer
  • Method and device for condensing rubber polymer
  • Method and device for condensing rubber polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0057] According to a preferred embodiment of the present invention, a first colloidal water pump is provided on the connecting pipeline between the colloidal water outlet at the bottom of the first coagulation tank F1 and the colloidal water inlet of the first water diversion pipeline G1 P1, such as figure 1 As shown; or the communication pipeline between the colloidal water outlet of the first water-dividing pipeline G1 and the colloidal water inlet of the second coagulation kettle F2 is provided with a first colloidal water pump P1, such as figure 2 shown.

[0058] According to a preferred embodiment of the present invention, a second colloidal water pump is provided on the communication pipeline between the colloidal water outlet at the bottom of the second coagulation tank F2 and the colloidal water inlet of the second water diversion pipeline G2 P3, such as figure 1 As shown; or the communication pipeline between the colloidal water outlet of the second water distribu...

Embodiment 1

[0075] The total volume of the first condensation kettle F1, the second condensation kettle F2 and the third condensation kettle F3 is 60m respectively 3 、100m 3 , 100m 3 . The length of the first water distribution pipe G1 is 2 meters, the diameter of the inner pipe 1 is DN400, the diameter of the jacket pipe 2 is DN600, and a row of drainage holes 3 with a diameter of 200mm are opened on both sides of the inner pipe 1, and the drainage holes 3 The distance between the holes is 600mm, and 7 drainage holes are opened on the 2-meter-long pipeline. The drainage holes are covered with wire mesh 4. The connection method between the wire mesh 4 and the drainage holes 3 is welding, and the mesh number of the wire mesh 4 is 20 mesh. The length of the second water diversion pipe G2 is 1.6 meters, the diameter of the inner pipe 1 is DN350, the diameter of the jacket pipe 2 is DN600, and a row of drain holes 3 with a diameter of 150mm are opened on both sides of the inner pipe 1, and ...

Embodiment 2

[0084] Coagulate the polyisoprene solution according to the method described in Example 1. The difference is that the operating conditions of the first coagulation tank F1 include: gauge pressure 0.01MPa, temperature 92°C, residence time 25.5min; The operating conditions of F2 include: gauge pressure 0.09MPa, temperature 109°C, residence time of colloidal water is 44min; the operating conditions of the third coagulation tank F3 include: gauge pressure 0.005MPa, temperature 93°C, residence time of colloidal water The time is 51.8min; the flow rate of the first colloidal water pump P1 is 112500kg / h; the flow rate of the second colloidal water pump P3 is 102160kg / h.

[0085] The result after condensation is: the total residence time of the condensation system is 2.02h, the system consumes a total of 45000kg of water and 1800kg of steam, and processes 7500kg of polyisoprene solution. Collect the vapor water that obtains 9345kg (the hexane content is 72.22% by weight), the third co...

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Abstract

The invention relates to the field of polymer reprocessing, and discloses a method and a device for condensing a rubber polymer. The method comprises the following steps that a rubber polymer solutionis separated from most of solvents in a first condensation kettle, so that a first colloidal particle liquid is obtained; the first colloidal particle liquid enters a first water separation pipelinefor primary water separation and concentration, so that a second colloidal particle liquid and hot water are obtained; desolvation is carried out on the second colloidal particle liquid in a second condensation kettle, so that a third colloidal particle liquid is obtained; the third colloidal particle water is injected into a second water separation pipeline for secondary water separation and concentration, so that a fourth colloidal particle liquid and hot water are obtained; and the fourth colloidal particle liquid is injected into a third condensation kettle for flash evaporation. Accordingto the method provided by the invention, the energy consumption can be reduced, the solvent recovery rate is improved, the solvent content in the rubber polymer can be reduced, and in the aspect of environment protection, the pollution to the environment caused by solvent residues entering an after-treatment unit can be reduced.

Description

technical field [0001] The invention relates to the field of polymer reprocessing, in particular to a method and device for agglomerating rubber polymers. Background technique [0002] Generally, the production process of rubber-like polymers includes processes such as polymerization, coagulation, and post-treatment. In the polymerization unit, one or more monomers are polymerized in the solvent under the action of a catalyst to obtain a polymer solution, and then enter the condensation unit, and the solvent in the polymer is flashed by steam and hot water by water analysis Separation, and the obtained water-containing polymer undergoes post-treatment processes such as drying to obtain a polymer product. The coagulation process of the water analysis method is to disperse the colloidal particles in the hot water in the form of droplets under mechanical stirring, and use direct steam to heat the hot water by condensing part of the steam to release latent heat, and the heat is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08C2/06C08C2/00
CPCC08C2/00C08C2/06
Inventor 周继东罗继红
Owner CHINA PETROLEUM & CHEM CORP