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Palladium-carbon catalyst for preparing alpha-phenethyl alcohol through selective hydrogenation of acetophenone, preparation method and applications thereof

A palladium-carbon catalyst and selective hydrogenation technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc. The efficiency of α-phenylethanol, low selectivity of α-phenylethanol, difficulty in catalyst recovery, etc., to achieve the effect of stable life, good catalytic activity and selectivity, and mild conditions

Active Publication Date: 2020-02-04
XIAN CATALYST NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Homogeneous catalytic reduction technology has high hydrogenation activity and selectivity, but the difficulty of catalyst recovery has affected its industrial application, and the use of acetophenone hydrogenation to prepare α-phenylethanol has a good application prospect
When noble metal catalysts are used for the hydrogenation of acetophenone, the selectivity of α-phenylethanol is often low, or high acetophenone conversion and selectivity of α-phenylethanol cannot be achieved at the same time
[0003] At present, the supported noble metal catalysts for the hydrogenation of acetophenone are mainly nano palladium and lanthanum metal catalysts supported by activated carbon. On the basis of the current level, further improve the activity and selectivity of the catalyst, and considering the high cost of precious metals, how to improve the service life of the catalyst is particularly critical

Method used

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  • Palladium-carbon catalyst for preparing alpha-phenethyl alcohol through selective hydrogenation of acetophenone, preparation method and applications thereof
  • Palladium-carbon catalyst for preparing alpha-phenethyl alcohol through selective hydrogenation of acetophenone, preparation method and applications thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] 1. a kind of acetophenone selective hydrogenation prepares α-phenethyl alcohol palladium charcoal catalyst, described catalyst is made up of carrier and the metal component loaded on the carrier, and described metal component comprises palladium and auxiliary agent, and described auxiliary The agent is neodymium, and the carrier is activated carbon; according to 100% by weight, the content of each component is as follows: palladium 5%, auxiliary agent 0.5%, and the rest are carriers;

[0028] Wherein, the particle size of the carrier is 200-800 mesh, and the specific surface area is 1200 m 2 / g; the average particle size of the palladium is 10-30nm.

[0029] 2. described acetophenone selective hydrogenation prepares the preparation method of α-phenethyl alcohol palladium charcoal catalyst, comprises the following steps:

[0030] (1) Add 10 g of the carrier into 6 mol / L nitric acid aqueous solution and boil for 2 hours, then wash with deionized water after natural cooli...

Embodiment 2

[0035] 1. a kind of acetophenone selective hydrogenation prepares α-phenethyl alcohol palladium charcoal catalyst, described catalyst is made up of carrier and the metal component loaded on the carrier, and described metal component comprises palladium and auxiliary agent, and described auxiliary The agent is lanthanum, and the carrier is activated carbon; according to 100% by weight, the content of each component is as follows: palladium 5%, auxiliary agent 0.5%, and the rest are carriers;

[0036] Wherein, the particle size of the carrier is 200-800 mesh, and the specific surface area is 1200 m 2 / g; the average particle size of the palladium is 10-30nm.

[0037] 2. described acetophenone selective hydrogenation prepares the preparation method of α-phenethyl alcohol palladium charcoal catalyst, comprises the following steps:

[0038] (1) Add 10 g of the carrier into 6 mol / L nitric acid aqueous solution and boil for 1 hour. After natural cooling, wash with deionized water un...

Embodiment 3

[0043]1. a kind of acetophenone selective hydrogenation prepares α-phenethyl alcohol palladium charcoal catalyst, described catalyst is made up of carrier and the metal component loaded on the carrier, and described metal component comprises palladium and auxiliary agent, and described auxiliary The agent is lanthanum, neodymium and nickel, and the carrier is activated carbon; according to 100% by weight, the content of each component is as follows: palladium 5%, auxiliary agent 0.5%, and the content of lanthanum, neodymium and nickel is equal, and the rest is carrier ;

[0044] Wherein, the particle size of the carrier is 200-800 mesh, and the specific surface area is 1200 m 2 / g; the average particle size of the palladium is 10-30nm.

[0045] 2. described acetophenone selective hydrogenation prepares the preparation method of α-phenethyl alcohol palladium charcoal catalyst, comprises the following steps:

[0046] (1) Add 10 g of the carrier into 10 mol / L nitric acid aqueou...

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Abstract

The invention discloses a palladium-carbon catalyst for preparing alpha-phenethyl alcohol through selective hydrogenation of acetophenone, wherein the catalyst comprises a carrier and metal componentsloaded on the carrier, the metal components comprise palladium and an auxiliary agent, the auxiliary agent is at least one selected from lanthanum, copper, cerium, neodymium and nickel, the carrier is active carbon, and the catalyst comprises, by mass, 1-5% of palladium, 0.1-0.5% of an auxiliary agent and the balance of a carrier. The invention further discloses a preparation method of the catalyst and a method for preparing alpha-phenethyl alcohol through selective hydrogenation of acetophenone by using the catalyst. According to the invention, the catalyst good catalytic activity and good selectivity; and with the application of the catalyst in preparation of alpha-phenethyl alcohol through selective catalytic hydrogenation of acetophenone, the product yield exceeds 90%, the selectivityis larger than 94%, and the catalyst is stable in service life, can be repeatedly used and belongs to an efficient and environment-friendly technology.

Description

technical field [0001] The invention belongs to the technical field of precious metal catalysts, and in particular relates to a palladium-carbon catalyst for preparing α-phenethyl alcohol through selective hydrogenation of acetophenone, a preparation method and application thereof. Background technique [0002] Acetophenone is a by-product of multiple production processes such as the oxidation of ethylbenzene to styrene. Using acetophenone as a raw material to prepare high value-added products meets the requirements of atom economy and green chemistry. α-Phenylethyl alcohol is an important chemical product widely used in the pharmaceutical and fragrance industries. α-Phenylethyl alcohol is widely used in the pharmaceutical and fragrance industries. The synthesis methods of α-phenylethanol include microbial fermentation and organic synthesis. Microbial fermentation generally uses phenylalanine and fluorophenylalanine as raw materials to produce α-phenylethanol through microb...

Claims

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Application Information

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IPC IPC(8): B01J23/63B01J23/89C07C29/145C07C33/22
CPCB01J23/63B01J23/894C07C29/145C07C33/22B01J35/393B01J35/399B01J35/23
Inventor 李小虎李霖金晓东曾利辉李岳峰曾永康张之翔
Owner XIAN CATALYST NEW MATERIALS CO LTD
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