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

Preparation method of macromolecule-supported catalyst for hydrogenation of nitrile-butadiene rubber

A technology for nitrile rubber and hydrogenation catalysis, which is applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, etc., and can solve high-load pretreatment methods, carrier loss, etc. problem, to achieve the effect of simple recovery, reduced hydrogenation cost and good stability

Active Publication Date: 2012-05-23
BEIJING UNIV OF CHEM TECH
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is mentioned in the Chinese patent CN1058973C that alumina or diatomaceous earth is used as a carrier to load a small amount of palladium before the glue is hydrogenated, and the carrier used has a pore size of 100-1000A and a specific surface area of ​​50-500m 2 / g, but the patent requires a higher load pretreatment method, and may cause the carrier to be lost in the glue

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
  • Preparation method of macromolecule-supported catalyst for hydrogenation of nitrile-butadiene rubber
  • Preparation method of macromolecule-supported catalyst for hydrogenation of nitrile-butadiene rubber
  • Preparation method of macromolecule-supported catalyst for hydrogenation of nitrile-butadiene rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take 3.0000g NBR and dissolve it in xylene solvent to form NBR glue with a concentration of 1.0%, and add it to the high-pressure reactor. Add 0.0300g RhCl to the reactor 3 , 0.3000g resin D1, controlled temperature 120°C, pressure 3.0MPa, reaction time 8h, cooled, discharged, isopropanol condensed, placed in a vacuum oven for 48h, test the degree of hydrogenation. The results are shown in Table 1

Embodiment 2

[0024] Change resin D1 in embodiment 1 to resin D2, and others are the same as embodiment 1. The results are shown in Table 1

Embodiment 3

[0026] Change resin D1 in embodiment 1 to resin D3, and others are the same as embodiment 1. The results are shown in Table 1

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
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention relates to a preparation method of a macromolecule-supported catalyst for hydrogenation of nitrile-butadiene rubber and belongs to the field of rubber hydrogenation. The preparation method comprises the following steps of: adding a catalyst rhodium trichloride (RhCl3) and resins with different functional groups into a high-pressure reaction kettle according to the mass ratio of the RhCl3 to the resins of 1:10-1:100; dissolving the nitrile-butadiene rubber into dimethylbenzene to prepare rubber solution; adding the rubber solution into the high-pressure reaction kettle; and stirring and heating the mixture for 0.5 to 12 hours and performing hydrogenation at hydrogen pressure of 0.5 to 3.0 MPa and at hydrogenation temperature of between 25 and 150 DEG C. The preparation methodhas the advantages that: the catalyst is prepared in situ; after the reaction is finished, a substrate and the catalyst are subjected to simple filtering separation; and the catalyst still has catalytic activity. The defects that the catalyst preparation is complex and is difficult to recover due to homogeneous phase catalytic hydrogenation are overcome.

Description

technical field [0001] The invention relates to a preparation method of a polymer-loaded catalyst for hydrogenation of nitrile rubber, in particular to selective hydrogenation of unsaturated carbon-carbon double bonds on molecular chains of butadiene and acrylonitrile copolymers in a heterogeneous solution. Background technique [0002] Hydrogenated nitrile rubber (hereinafter referred to as HNBR) is generally obtained by hydrogenating a solution of NBR. It is used in a wide range of applications due to its excellent oil resistance, chemical resistance, and weather resistance. Mainly used in sealing rings of automobiles, ships, and spacecraft, oil-resistant pipelines, etc. [0003] The solution-selective hydrogenation of NBR occupies an irreplaceable position in the preparation of HNBR. The most effective catalyst for the solution-selective hydrogenation of NBR is Wilkinson catalyst, RhCl(PPh 3 ) 3 . However, the abundance of rhodium (Rh) in the earth's crust is very lo...

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): C08F236/12C08C19/02B01J31/30
Inventor 岳冬梅张立群杨守法卢立华周浩
Owner BEIJING UNIV OF CHEM TECH
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