A catalyst supported by two-component hybrid particles and its preparation method

A technology of hybrid particles and catalysts, which is applied in the preparation of organic compounds, catalysts for physical/chemical processes, hydrogenation preparation, etc. It can solve the problems of activity limitation, low surface area of ​​inorganic carrier, and weak loading.

Active Publication Date: 2020-05-15
BEIJING INST OF CLOTHING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the current catalysts are supported on inorganic carriers, such as alumina, silica gel, activated carbon and diatomaceous earth. Among them, inorganic carriers are easier to combine with catalysts. However, inorganic carriers have constraints such as low surface area and limited activity.
[0004] It has also been reported that catalysts are supported on polymers, such as polyvinyl alcohol and polyvinyl pyrrolidone, especially polymers with environmental responsiveness have attracted much attention, but the support of inorganic substances on polymers often has the disadvantages of being weak and easy to fall off.

Method used

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  • A catalyst supported by two-component hybrid particles and its preparation method
  • A catalyst supported by two-component hybrid particles and its preparation method
  • A catalyst supported by two-component hybrid particles and its preparation method

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Embodiment approach

[0042] According to a preferred embodiment of the present invention, the hybrid monomer is a monomer containing inorganic elements, or a mixture of monomers containing inorganic elements and other monomers.

[0043] In a further preferred embodiment, the hybrid monomer is a monomer represented by formula (a) or a monomer represented by formula (a) with an amide group, a hydroxyl group, a carbonyl group, a phenyl group, an alkoxy group and / or or mixtures of alkyl monomers.

[0044]

[0045] According to a preferred embodiment of the present invention, in formula (a):

[0046] (1) M is selected from Fe, Si, Ti, Mg, Zr, B or Al, preferably selected from Fe, Si, Ti or Al, more preferably selected from Si or Ti, such as Si;

[0047] (2) R 1 from C 2 ~C 8 Alkenyl group, styryl group or group represented by formula (d-1), preferably selected from C 2 ~C 4 Alkenyl, styryl or groups represented by formula (d-1), more preferably selected from acryloyloxy, methacryloyloxy or vin...

Embodiment 1

[0149] Dissolve 10g of N-isopropylacrylamide, 0.5g of N,N-methylenebisacrylamide, and 2mg of potassium persulfate in 20ml of water, add 1g of trimethoxyvinylsilane into 30ml of toluene, and mix the above two solutions , then add 0.5g of sodium lauryl sulfate, stir and react at 90°C for 1 hour, cool to room temperature, centrifuge, collect the solid precipitate and wash with 50ml of water and ethanol three times respectively, and the white particles obtained are the dual-partition hybrid particles base.

[0150] Disperse 1 g of the above-prepared dual-partition hybrid particle substrate in 800 mL of water, add 20 mL of 0.1 mol / L palladium chloride hydrochloric acid solution, stir for 30 minutes, add 10 mL of 0.2 mol / L potassium borohydride dropwise, and ultrasonicate for 1 hour; centrifuge, After washing, a catalyst supported by bipartitioned hybrid particles is obtained.

Embodiment 2

[0152] Dissolve 1.6g of N-isopropylacrylamide, 0.2g of acrylic acid, 0.16g of N,N-methylenebisacrylamide and 20mg of ammonium persulfate in 40ml of water, then add 18mg of acryloyloxypropyltrimethyl Add oxysilane to 30ml toluene, mix the above two solutions, then add 0.5g sodium dodecyl sulfate, react at 70°C for 1h, cool to room temperature, add 1g tetraethyl orthosilicate, react for 48 hours, then centrifuge , the solid precipitate was collected and washed three times with 50 ml of water and ethanol respectively to obtain white particles which were the base of the dual-partition hybrid particles.

[0153] Dissolve the above-mentioned dual-partition hybrid particle substrate in 1L of water, then add 10ml of 0.2mol / L palladium chloride solution and 1mL of 1mmol / L chloroauric acid solution, ultrasonicate for 30min, and then add 4mL of 1wt.% sodium borohydride solution , and stirred for 2 hours, filtered and washed to obtain a catalyst supported by bipartitioned hybrid particles...

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Abstract

The invention discloses a two-component hybrid particle supported catalyst. The catalyst comprises a bisected hybrid particle substrate and a catalyst body, wherein the catalyst body is loaded on the bisected hybrid particle substrate, and the bisected hybrid particle substrate comprises a responsive polymer component and a hybrid component. A preparation method for the catalyst comprises the following steps: adding the bisected hybrid particle substrate into a solvent for dispersion; then adding a metal salt solution and carrying out stirring or ultrasonic treatment; adding a reducing agent or a precipitator and carrying out stirring or ultrasonic treatment; optionally carrying out standing; then carrying out filtering or centrifugation and collecting a particle; and carrying out washing so as to obtain the two-component hybrid particle supported catalyst. The two-component hybrid particle supported catalyst has high catalytic activity and has a switchable catalytic function in different surrounding environments. The preparation method is easy to control and applicable to preparation of the catalyst in different scales, especially to mass production of the catalyst.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a supported catalyst, in particular to a catalyst supported by two-component hybrid particles and a preparation method thereof. Background technique [0002] Catalysts can change the rate of chemical reactions without changing their own weight and properties. Catalysts are used in more than 90% of industrial production. The highly dispersed catalyst active components that exist alone have a strong tendency to aggregate, driven by the thermodynamic trend of reducing surface free energy, and are easily sintered due to the increase in temperature, resulting in a rapid decrease in activity. However, if the catalyst is loaded on a certain carrier, the sintering temperature of the active components will be increased, thereby improving the thermal stability of the catalyst. [0003] Most of the current catalysts are supported on inorganic carriers, such as alumina, silica gel, activated carbon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/06C07C209/36C07C211/46C07C29/20C07C35/08
CPCB01J31/06B01J2231/62B01J2231/641B01J2231/646C07C29/172C07C29/20C07C209/36C07C211/46C07C35/08
Inventor 刘继广王锐张秀芹
Owner BEIJING INST OF CLOTHING TECH
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