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Hydrogenated styrene-conjugated diene copolymer and its catalyst removal method and preparation method

A technology for conjugated diene and hydrogenated styrene, which is applied in the field of hydrogenated styrene-conjugated diene copolymer and its catalyst removal, which can solve difficult nickel content, complex catalyst removal methods, and reduce to a lower level, etc. problem, to achieve the effect of simple removal process

Active Publication Date: 2019-01-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the defects that the catalyst removal method of the existing hydrogenated polystyrene-conjugated diene copolymer is complex and difficult to reduce the nickel content in the nickel-based hydrogenation catalyst to a lower level, and provides a Catalyst removal method for hydrogenated styrene-conjugated diene copolymer containing nickel-based hydrogenation catalyst capable of reducing nickel content to lower level, hydrogenated styrene-conjugated diene copolymer and preparation thereof method

Method used

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  • Hydrogenated styrene-conjugated diene copolymer and its catalyst removal method and preparation method
  • Hydrogenated styrene-conjugated diene copolymer and its catalyst removal method and preparation method

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preparation example Construction

[0042] The present invention also provides a method for preparing a hydrogenated styrene-conjugated diene copolymer, the method comprising: hydrogenating the styrene-conjugated diene copolymer with hydrogen in the presence of a nickel-based hydrogenation catalyst, Obtaining the hydrogenated styrene-conjugated diene copolymer glue solution, the method further includes removing the catalyst from the obtained hydrogenated styrene-conjugated diene copolymer glue solution by using the above catalyst removal method.

[0043] The present invention also provides the hydrogenated styrene-conjugated diene copolymer prepared by the method for preparing the hydrogenated styrene-conjugated diene copolymer.

[0044] The hydrogenated styrene-conjugated diene copolymer with low nickel content can be obtained by adopting the preparation method of the present invention. Preferably, the nickel content in the hydrogenated styrene-conjugated diene copolymer provided by the present invention is belo...

Embodiment 1

[0052] This example is used to illustrate the catalyst removal method of the present invention and the preparation of hydrogenated polystyrene-butadiene copolymer.

[0053] use figure 1 with 2 The stirring device shown is carried out, under the agitation of the end line speed of the blade of the stirring paddle 3 being 55m / min, the above-mentioned hydrogenated polystyrene-butadiene copolymer glue solution is sprayed into by the inner spray pipe 21, and water is sprayed from the outside Pipe 22 sprays in, and hydrogenated polystyrene-butadiene copolymer glue liquid is sprayed out by nozzle of nozzle pipe 2 while contacting with citric acid aqueous solution (citric acid content is 1 weight %) at the outlet of nozzle pipe 21. Among them, the injection linear velocity of the hydrogenated polystyrene-butadiene copolymer glue is 15m / min, the volume flow rate is 0.03L / min, and the temperature is 60°C; the injection linear velocity of the citric acid aqueous solution is 150m / min, and...

Embodiment 2

[0056] This example is used to illustrate the catalyst removal method of the present invention and the preparation of hydrogenated polystyrene-butadiene copolymer.

[0057] According to the method described in Example 1, the difference is that a 2% by weight aqueous solution of citric acid at 60° C. is used as an aqueous extractant to spray from the outer nozzle 22 to obtain a hydrogenated polystyrene-butadiene copolymer The nickel content in the dry glue is 10ppm.

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Abstract

The present invention relates to a catalyst removal method for a hydrogenated styrene-conjugated diene copolymer containing a nickel-based hydrogenation catalyst. The catalyst removal method comprises that a hydrogenated styrene-conjugated diene copolymer rubber liquid contacts a water-containing extractant in a jetting manner under a stirring condition, wherein a ratio of the hydrogenated styrene-conjugated diene copolymer rubber liquid jetting linear velocity to the water-containing extractant jetting linear velocity during the moment of the contacting is 1:8-100, and a volume flow ratio of the hydrogenated styrene-conjugated diene copolymer rubber liquid to the water-containing extractant is 1:2-10. The invention further provides a hydrogenated styrene-conjugated diene copolymer preparation method and a hydrogenated styrene-conjugated diene copolymer prepared through the method. According to the present invention, with the method, the nickel content in the hydrogenated styrene-conjugated diene copolymer rubber liquid can be simply reduced so as to prepare the hydrogenated styrene-conjugated diene copolymer having the low nickel content.

Description

technical field [0001] The invention relates to a hydrogenated styrene-conjugated diene copolymer and its catalyst removal method and preparation method. Background technique [0002] Hydrogenated polystyrene-conjugated diene copolymer saturates the unsaturated double bonds in the rubber segment by hydrogenation, in addition to maintaining the thermoplasticity and high elasticity of polystyrene-conjugated diene copolymer, it also has a higher than polystyrene Ethylene-conjugated diene copolymer has better heat resistance, anti-oxidation, anti-ozone, resistance to ultraviolet degradation, etc., and acid and alkali resistance, wear resistance and flexibility have also been improved, and the application range is further expanded, and the value Much higher than ordinary polystyrene-conjugated diene copolymer, it belongs to the second generation thermoplastic elastomer. [0003] Hydrogenation catalysts for polystyrene-conjugated diene copolymers fall into two categories, heterog...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08C19/02C08C1/04C08F236/10
CPCC08C1/04C08C19/02C08F236/10
Inventor 唐正伟贺小进陈建军徐一兵徐林常学工
Owner CHINA PETROLEUM & CHEM CORP
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