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Cheap metal catalyst and application thereof in selective hydrogenation reaction of alkyne compounds

A technology of metal catalyst and alkyne compound, which is applied to cheap metal catalyst and its application field in selective hydrogenation reaction of alkyne compound, can solve the problems of harsh reaction conditions, limitation of cheap metal catalyst, cumbersome preparation process, etc. The effect of simple operation, improved catalytic activity and selectivity, and simple preparation method

Active Publication Date: 2021-08-20
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of cheap metal-based catalysts still has inherent weaknesses, such as cumbersome preparation process and harsh reaction conditions, which limit the application of this kind of cheap metal catalysts.

Method used

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  • Cheap metal catalyst and application thereof in selective hydrogenation reaction of alkyne compounds
  • Cheap metal catalyst and application thereof in selective hydrogenation reaction of alkyne compounds
  • Cheap metal catalyst and application thereof in selective hydrogenation reaction of alkyne compounds

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1 is based on TiO 2 -Vo supported Ni heterogeneous catalyst

[0022] Add 30mL of ethylene glycol and 1mL of titanium tetrachloride into a 50ml polytetrafluoroethylene kettle, stir at room temperature for ten minutes, add 1mL of deionized water, stir for ten minutes and then heat-treat at 150°C for 6 hours, and filter the suspension with suction at 60 Dry under vacuum at ℃ for 12h to obtain TiO 2 (B) Carrier. The above TiO 2 (B) Under a nitrogen atmosphere, heat up to 800°C in a nitrogen furnace and calcinate for 3 hours, and finally cool down to room temperature naturally to obtain the TiO with oxygen vacancies 2 material, label it TiO 2 -Vo carrier.

[0023] TiO 2 -Vo carrier 100mg into a 100ml beaker, add 20mL of water and 1mL of pre-constituted NiCl 2 Aqueous solution (NiCl 2 The concentration of the aqueous solution is 10mg / mL), and it is dried under the condition of 80°C oil bath, and the obtained solid is ground, and finally the temperature is r...

Embodiment 2

[0024] Embodiment 2 is based on TiO 2 -Vo supported Ni heterogeneous catalyst

[0025] TiO 2 -The preparation steps of the Vo carrier were repeated in Example 1.

[0026] Add 100mg TiO to a 100ml beaker 2 -Vo carrier and 20mL of deionized water, sonicate for 10min to a homogeneous mixture, add 1mL of pre-configured NiCl 2 Aqueous solution (NiCl 2 The concentration of the aqueous solution is 10mg / mL), after ultrasonication for 10min, add 1mL of freshly prepared sodium borohydride aqueous solution and continue ultrasonication for 30min (the concentration of sodium borohydride aqueous solution is 15mg / mL), Ni 2+ Reduced to simple Ni, suction filtered, and the filter residue was washed with water and dried to obtain TiO 2 -Vo supported Ni catalyst.

Embodiment 3

[0027] Embodiment 3 is based on TiO 2 -Vo supported Ni heterogeneous catalyst

[0028] TiO 2 -The preparation steps of the Vo carrier were repeated in Example 1.

[0029]Evenly stack 10mg of nickelocene powder on the front of the porcelain boat, and spread 100mg of TiO on the back of the porcelain boat 2 -Vo carrier, then place the ceramic boat in a nitrogen furnace, and feed nitrogen into the nitrogen furnace. The nitrogen gas flow first contacts with the nickelocene particles and then with the TiO 2 -Vo carrier contact, in a nitrogen atmosphere, heat up to 400 ° C in a nitrogen furnace and calcined for 3 hours, and finally cool down to room temperature naturally to obtain a TiO-based 2 -Vo supported Ni heterogeneous catalysts.

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Abstract

The invention discloses a cheap metal catalyst and application thereof in selective hydrogenation reaction of alkyne compounds. The catalyst comprises the following components in percentage by weight: 9-90% of titanium oxide and 1-10% of low-cost metal particles loaded on the titanium oxide; the titanium oxide is a TiO2 material with oxygen vacancies, TiO2 (B), anatase, rutile or titanium dioxide P25; and the cheap metal is selected from Fe, Ni or Co. The cheap metal in the catalyst and the oxygen vacancy titanium dioxide carrier have strong interaction, so that the metal is uniformly anchored on the carrier, agglomeration is prevented, and more active sites are provided. Meanwhile, the interaction between the titanium oxide and the metal particles is further regulated and controlled by using an in-situ thermal diffusion preparation method, so that the metal particles are rich in charges, the catalytic activity and selectivity of selective hydrogenation of the alkyne compound are improved; and when the alkyne compound is applied to preparation of styrene by catalyzing a phenylacetylene hydrogenation reaction, the selectivity of the styrene can be greater than 97%; and the conversion rate of the phenylacetylene is as high as 100%.

Description

technical field [0001] The invention relates to a cheap metal catalyst and its application in the selective hydrogenation reaction of alkyne compounds. Background technique [0002] Various plastics, synthetic rubber, synthetic fibers and fine chemical products can be produced through the processing of olefin compounds synthesized by selective hydrogenation of alkynes, which play an important role in the fields of food, clothing, automobiles, materials, and medicine. Therefore, the realization of half-hydrogenation of alkynes has important application value and significance. [0003] At present, the Lindlar catalyst commonly used in the semi-hydrogenation industry of alkynes needs to add a large amount of Pd and Bi additives. Obviously, the loss of Pd and Bi during use will cause serious pollution to the environment. At the same time, these modifiers are not easy to be excreted from the body. Physiological functions have a more serious impact and threaten human health. Due...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01J23/75B01J23/755B01J37/08B01J37/10B01J37/16C07C5/09C07C15/46
CPCB01J23/755B01J23/75B01J23/745B01J37/10B01J37/08B01J37/16C07C5/09C07C15/46B01J35/399B01J35/393B01J35/23
Inventor 王建国黄崧涛魏中哲
Owner ZHEJIANG UNIV OF TECH
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