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A kind of method utilizing bimetallic catalyst to catalyze phenylacetylene to prepare styrene

A bimetallic catalyst, a technology of phenylacetylene, which is applied in the field of nanomaterials to achieve the effects of improved selectivity, good application prospects and high activity

Active Publication Date: 2021-03-19
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this catalyst has not been applied to the selective hydrogenation of phenylacetylene, because of its catalytic characteristics, it may be a potential catalyst for the selective hydrogenation of phenylacetylene

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Application of Platinum Copper / Activated Carbon Catalyst in Selective Hydrogenation of Phenylacetylene

[0048] 1g H 2 PtCl 6 ·H 2 Dissolve O (Pt≥37.0%) in 50mL ethylene glycol, mix with 50mNaOH in ethylene glycol solution (0.25M) under stirring at room temperature, continue stirring at room temperature for 30min, heat to 160°C under the protection of an inert atmosphere and keep it for 3h, cool The temperature was lowered to obtain Pt colloid (0.32%). Disperse 3gC in 100mL of ethylene glycol, under the protection of an inert atmosphere, add 18.75g of Pt colloid dropwise, stir for 2h, add 350mL of water, react for 3h, wash with water, and vacuum freeze-dry to obtain a platinum / activated carbon catalyst.

[0049] Take copper chloride 0.32g anhydrous CuCl 2 Dissolve in 30mL of water, add 20mL of 0.1M NaOH solution, stir for 10min to obtain a blue flocculent precipitate, centrifuge and wash with water three times. 50 mL of ammonia solution (28 wt%) was added to obtain...

Embodiment 2

[0053] Application of Ru-Cu / Activated Carbon Catalyst in Selective Hydrogenation of Phenylacetylene

[0054] First, 1g RuCl 3 ·3H 2 Dissolve O (Ru≥37.0%) in 50mL ethylene glycol, mix with 50mNaOH in ethylene glycol solution (0.25M) under stirring at room temperature, continue stirring at room temperature for 30min, heat to 160°C under the protection of an inert atmosphere and keep it for 3h, cool The temperature was lowered to obtain Ru colloid (0.32%). Disperse 3gC into 100mL ethylene glycol, add 18.75g Ru colloid dropwise under the protection of an inert atmosphere, stir for 2 hours, add 350mL water, react for 3 hours, wash with water, and vacuum freeze-dry to obtain a ruthenium / activated carbon catalyst.

[0055] Take copper chloride 0.32g anhydrous CuCl 2 Dissolve in 30mL of water, add 20mL of 0.1M NaOH solution, stir for 10min to obtain a blue flocculent precipitate, centrifuge and wash with water three times. 50 mL of ammonia solution (28 wt%) was added to obtain dar...

Embodiment 3

[0059] Application of Rhodium Copper / Activated Carbon Catalyst in Selective Hydrogenation of Phenylacetylene

[0060] First, 1g RhCl 3 ·nH 2 Dissolve O (Rh≥39.0%) in 50mL ethylene glycol, mix with 50mNaOH in ethylene glycol solution (0.25M) under stirring at room temperature, continue stirring at room temperature for 30min, heat to 160°C under the protection of an inert atmosphere and keep it for 3h, cool The temperature was lowered to obtain Rh colloid (0.32%). Disperse 3gC into 100mL ethylene glycol, under the protection of inert atmosphere, add 18.75g Rh colloid dropwise, stir for 2h, add 350mL water, react for 3h, wash with water, vacuum freeze-dry to get rhodium / activated carbon catalyst.

[0061] Dissolve 0.32g of copper chloride anhydrous CuCl2 in 30mL of water, add 20mL of 0.1M NaOH solution, and stir for 10min to obtain a blue flocculent precipitate, which is centrifuged and washed three times with water. 50 mL of ammonia solution (28 wt%) was added to obtain dark ...

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PUM

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Abstract

The invention provides a method of preparing styrene by catalyzing phenylacetylene by using a bimetallic catalyst. The method of preparing styrene by catalyzing phenylacetylene by using the bimetalliccatalyst comprises the following steps: dispersing a substance containing phenylacetylene as a primer in a solvent; and carrying out a selective hydrogenation reaction by taking H2 as a reducing agent and the bimetallic catalyst as a catalyst to obtain styrene. According to the method of preparing styrene by catalyzing phenylacetylene by using the bimetallic catalyst, the catalytic activity of the bimetallic catalyst is relatively good, and more importantly, the selectivity of the selective hydrogenation of phenylacetylene is improved obviously, the highest selectivity can reach 99.2%, and the method has a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and relates to a method for preparing styrene by using a bimetallic catalyst to catalyze phenylacetylene. Background technique [0002] As a very important organic chemical intermediate raw material, styrene is widely used in the production of polystyrene, ABS resin, SAN resin and the synthesis of rubber (such as styrene-butadiene rubber, latex). Using the C8 fraction in pyrolysis gasoline to extract and recover styrene, compared with traditional processes such as ethylbenzene dehydrogenation and propylene oxide-styrene co-production, not only can greatly reduce costs and increase production to meet downstream products At the same time, it can reduce the consumption of hydrogen and avoid the poisoning phenomenon caused by styrene polymerization, so it has attracted more and more attention. [0003] However, in the process of cracking gasoline, there will be 3000-7000ug / g phenylacetyl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C15/46C07C5/09B01J23/89B01J37/03B01J37/16
CPCB01J23/8926B01J35/0013B01J37/031B01J37/038B01J37/16C07C5/09C07C2523/89C07C15/46
Inventor 刘洋梁明会江鹏王悦王焕
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA