Loaded type silicon hydrogenation catalyst and its synthetic method

A technology of hydrosilation reaction and synthesis method, which is applied in the direction of physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, silicon organic compounds, etc., which can solve the difficulty of catalyst separation, non-recyclable utilization, high catalyst cost, etc. problems, to achieve the effects of easy control, wide range of applications, and simple preparation methods

Inactive Publication Date: 2007-01-24
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the catalysts developed above have been widely used in the organosilicon industry, as a homogeneous catalyst, the separation of the catalyst is difficult, cannot be recovered, and cannot be recycled, making the cost of the catalyst relatively high

Method used

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  • Loaded type silicon hydrogenation catalyst and its synthetic method
  • Loaded type silicon hydrogenation catalyst and its synthetic method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: the coupling treatment of catalyst carrier (with silica as carrier)

[0020] In a 250mL reactor equipped with a nitrogen inlet and outlet and a stirring device, add 6.0g of fumed silica and 140mL of toluene, stir at room temperature for half an hour under nitrogen protection, add 6.0g of vinyltriethoxysilane, heat at 110°C The reaction was stirred at reflux for 24 hours. Filtrate to obtain a slightly viscous white powder, dry it, and activate the reaction at a temperature of 150° C. and a pressure of 26 Pa for 5 hours. Cool and grind, wash with acetone, and dry at 120°C / 26Pa to constant weight to obtain a non-sticky white powder.

Embodiment 2

[0021] Embodiment 2: the coupling treatment of catalyst carrier (with glass fiber as carrier)

[0022] In a 250mL reactor protected by nitrogen, add 2.0g of glass fiber and 100mL of xylene, add 100mL of an aqueous solution with a mass concentration of 1.0% vinyltriethoxysilane, heat, and reflux at 140°C for 12 hours. After stopping the reaction The glass fibers were taken out and activated for 5 hours at a temperature of 150° C. and a pressure of 26 Pa. Then wash with acetone and dry at 120°C / 26Pa to constant weight.

Embodiment 3

[0023] Embodiment 3: the coupling treatment of catalyst carrier (with silica as carrier)

[0024] In a 250mL reactor equipped with a nitrogen inlet and outlet and a stirring device, add 6.0g of fumed silica and 150mL of benzene, stir at room temperature for half an hour under nitrogen protection, add 4.0g of vinyltriethoxysilane, heat at 30°C The reaction was stirred at reflux for 3 hours. Filter and activate the reaction for 5 hours at a temperature of 150° C. and a pressure of 26 Pa. Cool and grind, wash with acetone, and dry at 120°C / 26Pa until constant weight to obtain a white powder.

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PUM

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Abstract

The present invention discloses a kind of supported silicon hydrogenation catalyst and its synthesis. The supported silicon hydrogenation catalyst is prepared with inorganic matter as carrier, and through bonding silicon-ethylene bond on the surface of the carrier with coupling agent and subsequent complexing with chloroplatinic acid hexahydrate as the complexing agent. The catalyst is supported heterogeneous catalyst and has the features of high catalytic efficiency, capacity of being recovered, capacity of being reused, etc. It may be used in catalyzing silicon hydrogenating reaction of silane and siloxane widely.

Description

technical field [0001] The invention relates to a hydrosilylation reaction catalyst and a preparation method thereof. Specifically, it relates to a supported hydrosilylation reaction catalyst and a synthesis method thereof. Background technique [0002] The hydrosilylation reaction is the most important reaction for the formation of new silicon-carbon bonded compounds, and its catalyst has always been a hot topic in the field of organosilicon and catalysts. Since Speier discovered chloroplatinic acid, a very effective homogeneous catalyst, in 1957, platinum-based catalysts have become the most effective class of catalysts in hydrosilylation reactions. In order to improve the reactivity of the catalyst, Karstedt et al. complexed chloroplatinic acid or chloroplatinate with vinyl-containing silane or siloxane to form a broad class of platinum complex-type hydrosilation catalysts. [0003] Although the catalysts developed above have been widely used in the organosilicon indust...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/06B01J31/30C07F7/02
Inventor 方征平羊海棠缪钱江李瑞隽佟立芳
Owner ZHEJIANG UNIV
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