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Chelating resin, pretreatment method, noble metal removal method, and method of removing noble metal catalyst from unsaturated copolymer hydrogenation liquid

A technology of chelating resin and pretreatment liquid, applied in the field of unsaturated copolymer hydrogenation, can solve the problems of secondary pollution of products, long time required to remove precious metal catalyst, etc., and achieve the effect of reducing removal time

Active Publication Date: 2018-07-27
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, noble metal removal method, and method of removing noble metal catalyst from unsaturated copolymer hydrogenation liquid
  • Chelating resin, pretreatment method, noble metal removal method, and method of removing noble metal catalyst from unsaturated copolymer hydrogenation liquid
  • Chelating resin, pretreatment method, noble metal removal method, and method of removing noble metal catalyst from unsaturated copolymer hydrogenation liquid

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1-1

[0107] This preparation example is used to illustrate the hydrogenation catalyst M p X m L n (P1) The preparation method, wherein M is rhodium, X is chlorine, L is triphenylphosphine, p is 1, m is 1, and n is 3.

[0108] Put 4.5 grams of PPh 3 Dissolve in 70℃ hot ethanol solution under argon protection, and add the dissolved solution to the reaction flask; weigh 0.75 g of RhCl 3 ·H 2 O is dissolved in ethanol solution under the protection of argon, heated to reflux at 78℃, and the RhCl 3 ·H 2 The ethanol solution of O was added dropwise to the reaction flask to react for 2.5 hours, the temperature was lowered to 25° C., filtered with suction, and washed with ether to obtain a powdered hydrogenation catalyst.

preparation example 1-2

[0110] This preparation example is used to illustrate the hydrogenation catalyst M 1 a M 2 b X c L d (P2) The 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.

[0111] Put 4.5 grams of PPh 3 Dissolve in 70℃ hot ethanol solution under the protection of argon, and add the dissolved solution to the reaction flask; weigh 0.5 g of RhCl 3 ·H 2 O and 0.23 g RuCl 3 ·H 2 O is dissolved in ethanol solution under the protection of argon, heated to reflux at 78℃, and the RhCl 3 ·H 2 O and RuCl 3 ·H 2 The ethanol solution of O was added dropwise to the reaction flask to react for 2.5 hours, the temperature was lowered to 25° C., filtered with suction, and washed with ether to obtain a powdered catalyst for hydrogenation with Rh:Ru=2:1.

[0112] The physical parameters of the chelating resin styrene-divinylbenzene copolymer used in Examples 1-21 are shown in Table 1.

[0113] Table 1

[0114]

[0115]

[0116] The hydrogenated bu...

Embodiment 1-19

[0127] (1) Soak the chelating resin styrene-divinylbenzene copolymer in the pretreatment liquid I at a'℃ for b'hours, and then filter to obtain the chelate treated by the pretreatment liquid I Resin, and then soak the obtained chelating resin in pretreatment liquid II, soaking at i'℃ for c'hours, and filter to obtain the pretreated chelating resin, wherein, pretreatment liquid I, pretreatment liquid The volume ratio of II to the chelating resin styrene-divinylbenzene copolymer is d', and the specific surface area of ​​the chelating resin after pretreatment was measured. The results are shown in Table 4;

[0128] (2) In the catalyst removal unit, the pretreated chelating resin is arranged in a packed tower, and the hydrogenated butadiene-acrylonitrile copolymer solution A prepared above is adjusted to f'g / at e'℃. The flow rate of min passes through the packed tower to remove the precious metal catalyst. The volume ratio of the hydrogenated butadiene-acrylonitrile copolymer solutio...

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Abstract

The invention relates to the field of unsaturated copolymer hydrogenation and discloses: a chelating resin, a pretreatment method thereof, a noble metal removal method, and a method of removing a noble metal catalyst from an unsaturated copolymer hydrogenation liquid. The pretreatment method includes a step of contacting the chelating resin with a pretreatment solution I and a pretreatment solution II, wherein the chelating resin comprises one or more of a mercapto group, a thiourea group, an isothiourea group, an aminophosphate group, and an aminocarboxylic group; the pretreatment solution Icomprises one or more of water, C1-C8 alkyl alcohol, and C3-C6 alkyl ketone; and the pretreatment solution II comprises a compound represented as the formula (I). The method of removing the noble metal catalyst from the unsaturated copolymer hydrogenation liquid includes a step of contacting the unsaturated copolymer hydrogenation liquid containing the noble metal catalyst with the chelating resin, wherein the nobel metal includes at least one selected from noble metals in the VIII group, and the chelating resin is the pretreated chelating resin. The method can remove the noble metal catalystfrom the unsaturated copolymer hydrogenation liquid at high removal rate and for low removal time.

Description

Technical field [0001] The present invention relates to the field of unsaturated copolymer hydrogenation, in particular to a pretreatment method of chelating resin, pretreated chelating resin, a method for removing precious metals and a catalyst for removing precious metals from an unsaturated copolymer hydrogenation solution 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 overall performance of heat resistance, acid fuel resistance, hydrogen sulfide resistance, and ozone resistance. The hydrogenation process of the above-mentioned nitrile rubber generally uses precious metal catalysts, which are mainly com...

Claims

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Application Information

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IPC IPC(8): C08J3/00C08C19/02C08C2/04C08L25/08
CPCC08C2/04C08C19/02C08J3/00C08J2325/08
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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