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Functional hyperbranched polymer supported platinum catalyst, preparation method and application thereof

A hyperbranched polymer, platinum catalyst technology, applied in the direction of organic compound/hydride/coordination complex catalyst, catalyst activation/preparation, physical/chemical process catalyst, etc., can solve the problem of low catalytic activity of platinum catalyst, etc. Excellent rheological properties, saving production costs and reducing dosage

Active Publication Date: 2010-12-08
SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The supports of platinum catalysts that have been reported are mostly cross-linked polystyrene resins, polymethacrylates, polysiloxanes, polyamides, SiO 2 、Al 2 o 3 , MgO, activated carbon and other porous solid materials, etc., the catalytic activity of platinum catalysts supported by these materials is generally lower than that of homogeneous catalysts

Method used

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  • Functional hyperbranched polymer supported platinum catalyst, preparation method and application thereof
  • Functional hyperbranched polymer supported platinum catalyst, preparation method and application thereof
  • Functional hyperbranched polymer supported platinum catalyst, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] A kind of terminal hydroxyl hyperbranched polymer immobilized platinum catalyst, its preparation method is as follows:

[0027] 0.2g analytical pure chloroplatinic acid is dissolved in the mixed solvent of 20g analytical pure isopropanol and 10g analytical pure tetrahydrofuran, add 10.0g terminal hydroxyl hyperbranched polymer H101 (purity is greater than 95wt%) and 0.3g analytical pure sodium bicarbonate mixes Evenly, after ultrasonication at 700W power for 20min, under normal pressure nitrogen condition, 30°C stirring reaction for 6h, and then stand at room temperature for 6h, evaporate the solvent under vacuum condition at 60°C to obtain loose powder, and then Put the powder into a Buchner funnel lined with filter paper, wash 3 times with 20ml of distilled water each time, wash out the sodium chloride, and then dry it in vacuum at 60°C to obtain a platinum-immobilized catalyst for a hydroxyl-terminated hyperbranched polymer. The platinum content is 0.75wt% (denoted a...

Embodiment 2

[0029] A kind of terminal hydroxyl hyperbranched polymer immobilized platinum catalyst, its preparation method is as follows:

[0030] Dissolve 0.4g of analytically pure sodium chloroplatinate in 40g of analytically pure n-propanol, add 10.0g of hydroxyl-terminated hyperbranched polymer H102 (purity greater than 95wt%) and 0.35g of analytically pure sodium bicarbonate and mix homogeneously, under 800W power After ultrasonication for 18 minutes, stir and react at 40°C for 5h under normal pressure nitrogen, then let stand at room temperature for 6h, evaporate the solvent under vacuum at 60°C to obtain a loose powder, and then put the powder into a filter paper pad In the Buchner funnel, wash 3 times with 20ml of distilled water each time, wash out the sodium chloride, and then dry in vacuum at 60°C to obtain the immobilized platinum catalyst of the hydroxyl-terminated hyperbranched polymer, and the platinum content is calculated to be 1.39wt%. (Denoted as Pt / H102-139).

Embodiment 3

[0032] A kind of terminal hydroxyl hyperbranched polymer immobilized platinum catalyst, its preparation method is as follows:

[0033] Dissolve 0.8g of analytically pure chloroplatinic acid in 60g of analytically pure isopropanol, add 10.0g of hydroxyl-terminated hyperbranched polymer H103 (purity greater than 95wt%) and 1.0g of analytically pure sodium bicarbonate and mix homogeneously, under a power of 900W After ultrasonication for 16 minutes, stir and react at 50°C for 4h under normal pressure nitrogen, then let stand at room temperature for 6h, evaporate the solvent under vacuum at 60°C to obtain a loose powder, and then put the powder into a filter paper pad In the Buchner funnel, wash 3 times with distilled water 20ml each time, wash out sodium chloride, then obtain the terminal hydroxyl hyperbranched polymer immobilized platinum catalyst at 60 ℃ of vacuum drying, after calculating its platinum content is 3.00wt% ( Recorded as Pt / H103-300).

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Abstract

The invention discloses a functional hyperbranched polymer supported platinum catalyst, a preparation method and application thereof. The preparation method has a technical scheme of: dissolving chloroplatinic acid or chloroplatinate into an organic solvent; then adding a terminal carboxyl group or terminal hydroxyl group hyperbranched polymer and a certain quantity of sodium bicarbonate into the organic solvent, and uniformly mixing the mixture; performing ultrasonic treatment on the mixture under the power of 700 to 1,200 W for 10 to 20 min; stirring and reacting at 30 to 90 DEG C for 1 to 6h under a nitrogen condition; and standing the mixture for 6 hours at the room temperature, vaporizing the solvent under a vacuum condition to obtain loosened powder, washing the obtained loosened powder with distilled water, drying the powder in vacuum to obtain the functional hyperbranched polymer supported platinum catalyst. The functional hyperbranched polymer supported nanometer platinum oxide catalyst prepared by the method is uniformly dispersed in a functional hyperbranched polymer carrier. The catalyst prepared by the method has the advantages of high catalytic activity, easy separation and the like in a hydrosilation addition reaction, simple production process, low cost and easy industrialization.

Description

technical field [0001] The invention relates to the technical field of platinum catalyst preparation for hydrosilylation reaction. It specifically relates to a functional hyperbranched polymer immobilized platinum catalyst and its preparation method and application. Background technique [0002] Most of the catalysts for the hydrosilylation reaction in the prior art are complexes of Group VIII noble metals, among which platinum has the highest catalytic activity. Platinum catalysts have very high catalytic activity for homogeneous hydrosilylation reactions, but the catalysts have poor stability, are easy to corrode metal equipment, and the induction period is difficult to control, and the regioselectivity is poor, and it is difficult to separate, recycle and reuse. After being immobilized, the platinum catalyst not only has the advantages of stable performance of heterogeneous solid catalysts, no corrosion of equipment, and easy recycling and reuse, but also has the charact...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22B01J37/00C07C15/073C07C5/03C07F7/08
Inventor 张道洪王晶火文君李廷成周继亮李琳张爱清李金林
Owner SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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