Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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

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

Active Publication Date: 2021-04-09
CHINA PETROLEUM & CHEM CORP +1
View PDF3 Cites 0 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 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

[0107] 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.

[0108] 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

[0110] 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.

[0111] 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.

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

[0113] Table 1

[0114]

[0115]

[0116] The hydrogenated b...

Embodiment 1-19

[0127] (1) Soak the chelating resin styrene-divinylbenzene copolymer in the pretreatment liquid I at a'°C, the duration of soaking is b' hours, and then filter to obtain the chelate processed by the pretreatment liquid I Resin, then the gained chelating resin is soaked in the pretreatment liquid II, the soaking duration at i'°C is c' hour, filters to obtain the pretreated chelating resin, wherein, the pretreatment liquid I, the pretreatment liquid II and the volume ratio of chelating resin styrene-divinylbenzene copolymer are d ', measure the specific surface area of ​​chelating resin after pretreatment, the results are shown in Table 4;

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
pore sizeaaaaaaaaaa
pore sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to the field of hydrogenation of unsaturated copolymers, and discloses a chelating resin, a pretreatment method thereof, a precious metal removal method, and a method for removing a precious metal catalyst from an unsaturated copolymer hydrogenation solution. The pretreatment method of chelating resin comprises that chelating resin is contacted with pretreatment liquid I and pretreatment liquid II, and chelating resin contains mercapto group, thiourea group, isothiourea group, aminophosphoric acid group and aminocarboxylic acid group At least one of the groups, the pretreatment liquid I contains at least one of water, C1-C8 alkyl alcohol and C3-C6 alkyl ketone, and the pretreatment liquid II contains the compound of the structure shown in formula (1). 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 at least one of the Group VIII noble metals, and the chelating resin is Pretreated chelating resin. This method obtains higher removal rate and less 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com