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

Hybrid dendritic polymer supported metal catalyst and preparation method and application thereof

A dendrimer, metal-loaded technology, used in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, catalytic reactions, etc., can solve the problem of increased production costs and large metal residues in hydrogenated polymers , damage the physical and chemical properties of the polymer and other problems, to achieve excellent catalytic hydrogenation effect

Active Publication Date: 2016-12-07
株洲淳华氢能科技开发有限公司
View PDF2 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of homogeneous catalysts is that the residual amount of precious metals in hydrogenated unsaturated diene polymers reduces the physical and chemical properties of the polymers, and the removal and recovery of precious metal catalysts are difficult, resulting in increased production costs
[0004] Chinese invention patent application 2014104623745 (2014.9.11, Wang Yang, Zhou Wei, Peng Xiaohong) disclosed a hybrid dendrimer-supported bimetallic nanoparticle catalyst and its preparation method and application. The new catalyst reported in the application has high catalytic activity and The characteristics of high selectivity, but the inventor found that because the carrier is loaded with metal nanoparticles, because the transition metal will catalyze the molecular chain breakage of the polymer under air conditions to generate free radicals, and these free radicals collide It will cause cross-linking of molecules; this type of catalyst will lead to a large amount of metal residues in the hydrogenated polymer, which will seriously damage the physical and chemical properties of the polymer
[0005] Therefore, in view of the problems of difficult catalyst recovery, high HNBR gelation rate and low catalytic activity in the current method of hydrogenating unsaturated diene polymers, a new compound with high selectivity, high catalytic activity, high cost performance, and easy separation and recovery has been prepared. Hydrogen catalyst is a key problem that needs to be solved urgently in the research of NBR hydrogenation production technology

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
  • Hybrid dendritic polymer supported metal catalyst and preparation method and application thereof
  • Hybrid dendritic polymer supported metal catalyst and preparation method and application thereof
  • Hybrid dendritic polymer supported metal catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1 The second generation of hybrid dendrimers loaded with rhodium and ruthenium metal and its catalytic hydrogenation of unsaturated diene polymers

[0036] 1. Surface-modified second-generation polypropyleneimine dendrimers (G 2 -M) Synthesis with reference to Chinese invention patent application 2014104623745: take 2.155g (2.79×10 -3 mol)G 2 PPI (Netherlands SyMO-Chem B.V company) was dissolved in 10ml acetonitrile for later use. 0.48g (4.8×10 -4 mol)1,11-bis[2,4,6-triisopropylbenzenesulfonyl]-6-[4-(3-bromopropyl)benzenesulfonyl]-1,6,11-triazacyclodeca Pentadecane-3,8,13-triene (MAC), 0.33g (2.4×10 -3 mol) of anhydrous potassium carbonate is placed in a reaction flask with a reflux and ventilation device. Connect the external ventilation device and replace the N 2 three times. Under normal temperature stirring, inject 0.24mlG into the flask successively 2 PPI / acetonitrile solution and 30ml acetonitrile. The temperature was raised to 107°C for 12 hours....

Embodiment 2

[0049] Example 2 The second generation of hybrid dendrimers supported rhodium and ruthenium metal and its catalytic hydrogenation of unsaturated diene polymers

[0050] 1. G 2 -M loaded ruthenium rhodium metal (G 2 -M(Rh 3+ 50 Ru 3+ 50 )) Catalyst preparation

[0051] Take 0.12g G 2 -M The second generation polypropylene imine polymer (G 2 -M) placed in a reaction bottle equipped with a ventilator, connected to an external ventilator, and replaced with N 2 three times. Under stirring at room temperature, 50 ml of tetrahydrofuran was added into the bottle, and then 0.5 ml of rhodium trichloride with a concentration of 0.1 mol / L and 0.5 ml of a ruthenium trichloride solution with a concentration of 0.1 mol / L were added. After stirring at room temperature for 24h, the hybrid dendrimer supported rhodium-ruthenium bimetallic catalyst G can be obtained 2 -M(Ru 3+ 50 Rh 3 + 50 ).

[0052] G 2 -M(Ru 3+ 50 Rh 3+ 50 ) UV absorption spectrum such as Figure 1-2 show...

Embodiment 3

[0061] Example 3 The second generation of hybrid dendrimers supported rhodium palladium metal and its catalytic hydrogenation of unsaturated diene polymers

[0062] 1. G 2 -M(Rh 3+ 70 PD 2+ 30 ) preparation

[0063] Take 0.12g G2-M and place it in a reaction bottle equipped with a ventilation device, connect the external ventilation device, and replace N 2 three times. Under normal temperature stirring, 50ml of tetrahydrofuran was added into the bottle, and then 0.7ml of 0.1mol / L rhodium trichloride and 0.3ml of 0.1mol / L palladium acetate solution were added. After stirring at room temperature for 26h, G 2 -M(Rh 3+ 70 PD 2+ 30 ).

[0064] Such as Picture 1-1 It can be seen that the characteristic peaks of rhodium trichloride and palladium acetate are 403nm and 328nm respectively. G 2 -M(Rh 3+ 70 PD 2 + 30 ) UV absorption spectrum such as Figure 1-3 shown. It can be seen from the figure that G 2 The characteristic absorption peaks of -M are located at 27...

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

No PUM Login to View More

Abstract

The invention discloses a hybrid dendritic polymer supported metal catalyst and a preparation method and application thereof. The catalyst is characterized in that polyacrylic imide modified by a 15-membered triolefinic macrocycle is taken as a carrier; one or two of Ru<3+>, Rh<3+>, Pd<2+>, Pt<2+> and Pt<4+> are taken as compounds of metal ions. In the preparation method, Gn1-M is taken as a carrier, and a way of complexing the carrier with the metal ions is adopted to prepare the metal catalyst. The metal catalyst is applied to catalytic hydrogenation on an unsaturated dialkene polymer. The catalyst prepared by the method has superior catalytic activity and selectivity, and efficient recovery of noble metal catalysts can be realized.

Description

technical field [0001] The invention relates to a catalyst for preparing hydrogenated unsaturated diene polymers, in particular to a hybrid dendrimer-supported metal catalyst for catalytic hydrogenation of unsaturated diene polymers and a preparation method thereof. Background technique [0002] Hydrogenated unsaturated diene polymer has good oil resistance; and due to its highly saturated structure, it has good heat resistance, excellent chemical corrosion resistance, excellent ozone resistance and high compression set resistance ; At the same time, the hydrogenated unsaturated diene polymer also has the characteristics of high strength, high tear performance and excellent wear resistance, and is one of the rubbers with excellent comprehensive performance. Hydrogenated nitrile rubber (HNBR) is a highly saturated elastomer obtained by special hydrogenation of unsaturated diene polymers, which can be prepared by catalyzing the butadiene unit on the nitrile rubber (NBR) chain ...

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
IPC IPC(8): B01J31/22C08C19/02
CPCC08C19/02B01J31/1815B01J2231/645B01J2531/0219B01J2531/0208B01J2531/824B01J2531/821B01J2531/822B01J2531/0241
Inventor 彭晓宏周为
Owner 株洲淳华氢能科技开发有限公司
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