Supported platinum catalyst for hydrosilylation and preparation method thereof

A technology for hydrosilylation, platinum catalyst, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalyst, organic compound/hydride/coordination complex catalyst, etc., can solve the problem of inability to recycle , the catalyst is difficult to separate, unfavorable for the use of precious metal Pt, etc., to achieve the effect of easy control, simple preparation method and uniform distribution

Active Publication Date: 2017-11-10
三亚光远新型材料有限公司
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these two catalysts have high activity, they are homogeneous catalysts. After the reaction, the catalysts are difficult to separate from the reaction system and cannot be recycled, which is not conducive to the use of precious metal Pt.

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Preparation of carrier polyvinylsilsesquioxane nanoparticles: add 1g of vinyltriethylsiloxane to 100g of water, stir vigorously to form a homogeneous solution, add dropwise ammonia water with a concentration of 25% by mass, adjust The pH of the solution was brought to 11. Next, the solution was reacted at 40° C. for 12 hours. After the reaction is completed, polyvinylsilsesquioxane nanoparticles can be obtained by centrifugal separation, ethanol washing and vacuum drying.

[0025] 2) Platinum loaded on the carrier: In the reaction flask, add polyvinylsilsesquioxane nanoparticles, chloroplatinic acid, sodium bicarbonate and absolute ethanol according to the mass ratio of 100:1:5:1200. Stir and react for 6 hours, filter, wash with 50% ethanol aqueous solution for 6 times, and dry in a vacuum oven to obtain a supported platinum hydrosilylation catalyst.

Embodiment 2

[0027] 1) Preparation of carrier polyvinylsilsesquioxane nanoparticles: 10g of vinyltrimethoxysiloxane was added to 100g of water, and after vigorous stirring to form a uniform solution, ammonia water with a mass percentage concentration of 28% was added dropwise to adjust The pH of the solution was brought to 11. Next, the solution was reacted at 40° C. for 12 hours. After the reaction is completed, polyvinylsilsesquioxane nanoparticles can be obtained by centrifugal separation, ethanol washing and vacuum drying.

[0028] 2) Loading platinum on the carrier: In the reaction flask, add polyvinylsilsesquioxane nanoparticles, sodium chloroplatinite, sodium bicarbonate and absolute ethanol according to the mass ratio of 100:1:20:3000, Stir and react at ℃ for 6 hours, filter, wash 6 times with 30% ethanol aqueous solution, and dry in a vacuum oven to obtain a supported platinum hydrosilylation catalyst.

Embodiment 3

[0030] 1) Preparation of carrier polyvinylsilsesquioxane nanoparticles: add 20g of vinyltriethylsiloxane to 100g of water, stir vigorously to form a homogeneous solution, add dropwise ammonia water with a concentration of 26% by mass, adjust The pH of the solution was brought to 11. Next, the solution was reacted at 80° C. for 3 hours. After the reaction is completed, polyvinylsilsesquioxane nanoparticles can be obtained by centrifugal separation, ethanol washing and vacuum drying.

[0031] 2) Loading platinum on the carrier: In the reaction flask, add polyvinylsilsesquioxane nanoparticles, potassium chloroplatinate, sodium bicarbonate and absolute ethanol according to the mass ratio of 80:1:10:2500, at 20°C The mixture was stirred and reacted for 24 hours, filtered, washed 4 times with 90% aqueous ethanol solution, and dried in a vacuum oven to obtain a supported platinum hydrosilylation catalyst.

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 supported hydrosilylation platinum catalyst and a preparation method thereof. The supported hydrosilylation platinum catalyst is a catalyst formed through adopting polyvinylsilsesquioxane nanoparticles as a carrier to support a monoatomic platinum catalyst and complexing platinum and vinyl groups on the polyvinylsilsesquioxane nanoparticles. The preparation method concretely comprises the following steps: reacting vinyl triethoxy siloxane or vinyl trimethoxy siloxane with ammonia water to obtain the carrier polyvinylsilsesquioxane nanoparticles, and reacting the polyvinylsilsesquioxane nanoparticles, a platinum compound, sodium bicarbonate and anhydrous ethanol in a reaction bottle to obtain the supported hydrosilylation platinum catalyst. The supported hydrosilylation platinum catalyst has high catalysis activity and can be recycled, and the preparation method is simple.

Description

technical field [0001] Embodiments of the present invention relate to platinum catalysts, and more specifically, embodiments of the present invention relate to a supported platinum hydrosilylation catalyst and a preparation method thereof. Background technique [0002] The hydrosilylation reaction refers to the addition reaction between organosilicon compounds containing silicon-hydrogen bonds and unsaturated compounds under certain conditions, and plays an important role in organosilicon chemistry. The occurrence of the hydrosilylation reaction depends on the catalysis of the catalyst, and platinum compounds are usually used as the hydrosilylation catalyst. Currently, widely used platinum catalysts are Speier catalyst (alcohol solution of chloroplatinic acid) and Karstedt catalyst (zero-valent monoatomic platinum complexed with vinyl-containing siloxane). Although these two catalysts have high activity, they are homogeneous catalysts. After the reaction, the catalysts are ...

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): B01J31/06B01J23/42
CPCB01J23/42B01J31/06
Inventor 刘忠平邓志华邓建国纪兰香马春彦白小峰
Owner 三亚光远新型材料有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap