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Chelating resin, pretreatment method, precious metal removal method, and precious metal catalyst removal method in unsaturated copolymer hydrogenation liquid

A technology of precious metal catalysts and chelating resins, which is applied in the pretreatment field of removing precious metal catalysts and chelating resins, can solve the problems of secondary pollution of products, long time required for removing precious metal catalysts, etc., and achieve short removal time Effect

Active Publication Date: 2021-08-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the existing method for removing precious metal catalysts from unsaturated copolymer hydrogenation solution, which may cause secondary pollution of products and the long defect of removing precious metal catalysts, and provide chelating resin Pretreatment method, pretreated chelating resin, noble metal removal method and method for removing noble metal catalyst from unsaturated copolymer hydrogenation solution

Method used

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  • Chelating resin, pretreatment method, precious metal removal method, and precious metal catalyst removal method in unsaturated copolymer hydrogenation liquid
  • Chelating resin, pretreatment method, precious metal removal method, and precious metal catalyst removal method in unsaturated copolymer hydrogenation liquid
  • Chelating resin, pretreatment method, precious metal removal method, and precious metal catalyst removal method in unsaturated copolymer hydrogenation liquid

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1-1

[0099] This preparation example is used to illustrate hydrogenation catalyst M p x m L n The production method of (P1), wherein M is rhodium, X is chlorine, L is triphenylphosphine, p is 1, m is 1, and n is 3.

[0100] 4.5 g PPh 3 Dissolve in hot ethanol solution at 70°C under the protection of argon, and add the dissolved solution into the reaction flask; weigh 0.75 g of RhCl 3 ·H 2 O was dissolved in ethanol solution under the protection of argon, heated to reflux at 78°C, and RhCl 3 ·H 2 The ethanol solution of O was added dropwise into the reaction flask to react for 2.5 hours, cooled to 25°C, filtered with suction, washed with ether to obtain a powder catalyst for hydrogenation.

preparation example 1-2

[0102] This preparation example is used to illustrate hydrogenation catalyst M 1 a m 2 b x c L d (P2) preparation method, wherein, M 1 for rhodium, M 2 is ruthenium, X is chlorine, L is triphenylphosphine, a:b:c:d=2:1:4:9.

[0103] 4.5 g PPh 3 Dissolve in hot ethanol solution at 70°C under the protection of argon, and add the dissolved solution into the reaction flask; weigh 0.5 g of RhCl 3 ·H 2 O and 0.23 g RuCl 3 ·H 2 O was dissolved in ethanol solution under the protection of argon, heated to reflux at 78°C, and RhCl 3 ·H 2 O and RuCl 3 ·H 2 The ethanol solution of O was added dropwise into the reaction flask to react for 2.5 hours, cooled to 25°C, filtered with suction, and washed with ether to obtain a powdered Rh:Ru=2:1 catalyst for hydrogenation.

[0104] The physical parameters of the chelating resin styrene-divinylbenzene copolymer that adopts among the embodiment 1-15 are shown in Table 1.

[0105] Table 1

[0106]

[0107]

[0108] The hydroge...

Embodiment

[0119] (1) Soak the chelating resin styrene-divinylbenzene copolymer in the pretreatment liquid at a'°C, the soaking time continues b'hour, then filter to obtain the pretreated chelating resin, wherein the pretreatment Liquid and the volume ratio of chelating resin styrene-divinylbenzene copolymer are c ', measure the specific surface area of ​​chelating resin after pretreatment, the results are shown in Table 4;

[0120] (2) In the catalyst removal unit, the pretreated chelating resin B is arranged in the packed tower, and at e'°C, the above-mentioned hydrogenated butadiene-acrylonitrile copolymer solution A prepared by f'g The flow rate of / min passes through the packed tower to remove the precious metal catalyst, wherein the volume ratio of the hydrogenated butadiene-acrylonitrile copolymer solution to the chelating resin is g', and after h' hours, a small amount of hydrogenated butadiene that has been removed is taken For the diene-acrylonitrile copolymer solution, the con...

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Abstract

The invention relates to the field of hydrogenation of unsaturated copolymers, and discloses a chelating resin and a pretreatment method thereof, a method for removing noble metals and a method for removing noble metal catalysts from an unsaturated copolymer hydrogenation solution. The pretreatment method of chelating resin comprises that chelating resin is contacted with pretreatment liquid, and chelating resin contains one or in mercapto group, thiourea group, isothiourea group, phosphoramidate group and aminocarboxylic acid Various, the pretreatment liquid contains one or more of water, C1-C8 alkyl alcohols and C3-C6 alkyl ketones. The method for removing the noble metal catalyst from the unsaturated copolymer hydrogenation solution comprises contacting the unsaturated copolymer hydrogenation solution containing the noble metal catalyst with a chelating resin, and the noble metal is one or more of the Group VIII noble metals, chelating The resin is a pretreated chelating resin. The method can remove the noble metal catalyst from the unsaturated copolymer hydrogenation solution with a higher removal rate and a lower removal time.

Description

technical field [0001] The present invention relates to the field of hydrogenation of unsaturated copolymers, in particular to a pretreatment method for chelating resins, a pretreated chelating resin, a method for removing precious metals and a catalyst for removing precious metals from unsaturated copolymer hydrogenation solutions Methods. Background technique [0002] Unsaturated copolymers such as butadiene-acrylonitrile copolymers contain carbon-carbon double bonds (C=C) in their molecular chains, which affect their heat resistance, aging resistance, and corrosion resistance, and limit their application fields. Catalytic hydrogenation of carbon-carbon double bonds not only maintains the original properties of nitrile rubber, but also improves the comprehensive properties of heat resistance, acid fuel resistance, hydrogen sulfide resistance, and ozone resistance. The hydrogenation process of the above-mentioned nitrile rubber generally uses a noble metal catalyst. The no...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/00C08F6/08
CPCC08F6/02C08J3/00C08J2300/10C08J2300/106
Inventor 佟辉毕海鹏邵明波关敏刘天鹤李建成徐林王雪
Owner CHINA PETROLEUM & CHEM CORP
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