Hydrogenation catalyst modified by using solid-phase modifier and application of hydrogenation catalyst

A technology of hydrogenation catalyst and modifier, which is applied in the direction of catalytic reaction, organic compound/hydride/coordination complex catalyst, physical/chemical process catalyst, etc., which can solve the complexity of multi-step synthesis steps, catalyst stability and The reusable performance has not yet been proven, and it is beneficial to repeated application, avoiding toxic residues, and reducing the cost of use

Active Publication Date: 2020-01-03
ZHEJIANG SUPERIOR TECH CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the stability and reusability of such catalysts have not been demonstrated, which are crucial for commercial applications.
In addition, the catalyst's multi-step synthesis steps complicate its potential commercial application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0116] Using PPS as Pd@CaCO 3 Solid-phase modifier of catalysts for selective hydrogenation of phenylacetylene. Among them, PPS and Pd@CaCO 3 The mass ratio of the catalyst was 200:1, and the other reaction conditions were the same as those in Comparative Example 1. Under different reaction times, the sampling analysis results are as follows:

[0117] When the reaction time (t) is 3.9h, the conversion rate (x) of the substrate phenylacetylene is 95%, and the selectivity rate (Y) of the target product styrene is 99%;

[0118] When the reaction time t=4.3h, the substrate phenylacetylene conversion rate x>99.9% (complete conversion), target product styrene selectivity Y=98%;

[0119] When the reaction time t=5.5h, the substrate phenylacetylene conversion rate x>99.9% (complete conversion), target product styrene selectivity Y=87%;

[0120] When the reaction time t=7h, the substrate phenylacetylene conversion rate x>99.9% (complete conversion), the target product styrene selec...

Embodiment 2

[0123] Using CdS as Pd@CaCO 3 Solid-phase modifier of catalysts for selective hydrogenation of phenylacetylene. where CdS and Pd@CaCO 3 The mass ratio of the catalyst is 40:1, and other reaction conditions are the same as those of Comparative Example 1. Under different reaction times, the sampling analysis results are as follows:

[0124] When the reaction time (t) is 1.5h, the conversion rate (x) of the substrate phenylacetylene is 76%, and the selectivity rate (Y) of the target product styrene is 99.4%;

[0125] When the reaction time t=2h, the substrate phenylacetylene conversion rate x>99.9% (complete conversion), target product styrene selectivity Y=98%;

[0126] When the reaction time t=3.6h, the substrate phenylacetylene conversion rate x>99.9% (complete conversion), target product styrene selectivity Y=87%;

[0127] When the reaction time t=5h, the substrate phenylacetylene conversion rate x>99.9% (complete conversion), target product styrene selectivity Y=87%;

...

Embodiment 3

[0130] Using ZnS as Pd@CaCO 3 Solid-phase modifier of catalysts for selective hydrogenation of phenylacetylene. where ZnS and Pd@CaCO 3 The mass ratio of the catalyst is 100:1, and other reaction conditions are the same as those of Comparative Example 1. Under different reaction times, the sampling analysis results are as follows:

[0131] When the reaction time (t) is 3.5h, the conversion rate (x) of the substrate phenylacetylene is 72%, and the selectivity rate (Y) of the target product styrene is 99.9%;

[0132] When the reaction time t=5.5h, the substrate phenylacetylene conversion rate x>99.9% (complete conversion), target product styrene selectivity Y=96%;

[0133] When the reaction time t=7h, the substrate phenylacetylene conversion rate x>99.9% (complete conversion), the target product styrene selectivity Y=96%;

[0134] When the reaction time t=8.5h, the substrate phenylacetylene conversion rate x>99.9% (complete conversion), target product styrene selectivity Y=9...

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Abstract

The invention discloses a hydrogenation catalyst modified by using a solid-phase modifier and an application of the hydrogenation catalyst. The hydrogenation catalyst is a mixture of a supported palladium catalyst and the solid-phase modifier, or a metal palladium material supported by using the solid-phase modifier as a carrier; when the hydrogenation catalyst is the mixture of the supported palladium catalyst and the solid-phase modifier, the mass ratio of the solid-phase modifier to the supported palladium catalyst is (0.1-500):1; and when the hydrogenation catalyst is the metal palladium material supported by using the solid-phase modifier as the carrier, the loading amount of metal palladium is 0.1-20 wt%, wherein the solid-phase modifier is polyphenylene sulfide or a metal sulfide, and the metal sulfide is at least one selected from the group consisting of silver sulfide, barium sulfide, cadmium sulfide, cerium sulfide, ferrous sulfide, ferrous disulfide, lithium sulfide, sodiumsulfide, nickel sulfide, manganese sulfide, molybdenum sulfide, selenium sulfide, tungsten sulfide, zinc sulfide, copper sulfide and titanium sulfide. The hydrogenation catalyst provided by the invention has high catalytic activity in selective hydrogenation of alkynes, and can effectively improve the catalytic selectivity of a target olefin product.

Description

technical field [0001] The invention relates to a hydrogenation catalyst modified by a solid-phase modifier and its application. Background technique [0002] The selective catalytic hydrogenation (or semi-hydrogenation) of alkynes to prepare the corresponding alkenes is an important chemical conversion reaction, which is widely used in the synthesis of alkenes in fine chemical industry, as well as monomers in petrochemical polymer industry ( Such as ethylene, propylene, styrene, etc.) to remove trace alkyne impurities. Currently, nanocatalysts based on different transition metals have been widely reported for the selective hydrogenation of alkynes. Among them, palladium nanoparticles (about 10 nm in size) catalysts loaded on various supports are the most commonly used catalysts, which have high activity and good selectivity. The classic Lindlar catalyst (palladium nanocatalyst supported on calcium carbonate carrier modified with lead or quinoline) developed in 1952 is the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/06B01J27/045C07C5/09C07C15/46C07C11/02C07C15/52C07C29/17C07C33/03C07C33/025
CPCB01J27/045B01J31/06B01J2231/645C07C5/09C07C29/17C07C15/46C07C11/02C07C15/52C07C33/03C07C33/025
Inventor 叶志斌黄凌琪
Owner ZHEJIANG SUPERIOR TECH CORP LTD
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