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Hydrogenation catalyst and preparation method and application thereof

A hydrogenation catalyst and catalyst technology, which are applied in the directions of catalyst activation/preparation, catalyst, carbon compound catalyst, etc., can solve the problems of serious environmental pollution, poor catalyst stability, low cumene selectivity, etc., and improve the cumene selectivity. The effect of improving the selectivity, reducing the cost of post-separation

Active Publication Date: 2021-03-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention provides a new α , The hydrogenolysis preparation method of α-dimethylbenzyl alcohol provides a possibility for one-step hydrogenolysis of α,α-dimethylbenzyl alcohol

Method used

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  • Hydrogenation catalyst and preparation method and application thereof
  • Hydrogenation catalyst and preparation method and application thereof
  • Hydrogenation catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Weigh 0.5gPdCl 2 and 2.5 g of glucose were dissolved in a prepared solution containing 10.0 g of concentrated hydrochloric acid, 5.0 g of citric acid and 100 g of water, and the pH value of the solution was adjusted to 3 with lye to obtain a Pd impregnation solution. Heat the impregnating solution to 80°C, weigh 25g of alumina carrier, immerse it in the Pd impregnating solution, stir it thoroughly for 10min, filter it, wash it with deionized water, dry it at 100°C for 12h, and place it in a muffle furnace (nitrogen atmosphere ) at 500°C for 4 hours to obtain catalyst A1. The main composition of catalyst A1 is shown in Table 2.

Embodiment 2

[0049] Weigh 0.5gPdCl 2 and 5.0 g of glucose were dissolved in a prepared solution containing 10.0 g of concentrated hydrochloric acid, 5.0 g of citric acid and 100 g of water, and the pH value of the solution was adjusted to 3 with lye to obtain a Pd impregnation solution. Heat the impregnating solution to 80°C, weigh 25g of alumina carrier, immerse it in the Pd impregnating solution, stir it thoroughly for 10min, filter it, wash it with deionized water, dry it at 100°C for 12h, and place it in a muffle furnace (nitrogen atmosphere ) at 500° C. for 4 h to obtain catalyst A2. The main composition of catalyst A2 is shown in Table 2.

Embodiment 3

[0051] Weigh 0.5gPdCl 2 and 10.0 g of glucose were dissolved in a prepared solution containing 10.0 g of concentrated hydrochloric acid, 5.0 g of citric acid and 100 g of water, and the pH value of the solution was adjusted to 3 with lye to obtain a Pd impregnation solution. Heat the impregnating solution to 80°C, weigh 25g of alumina carrier, immerse it in the Pd impregnating solution, stir it thoroughly for 10min, filter it, wash it with deionized water, dry it at 100°C for 12h, and place it in a muffle furnace (nitrogen atmosphere ) at 500° C. for 4 h to obtain catalyst A3. The main composition of catalyst A3 is shown in Table 2.

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Abstract

The invention provides a hydrogenation catalyst as well as a preparation method and application thereof. Main components of the hydrogenation catalyst comprise an aluminum oxide carrier, a metal active component and carbon. Specifically, the catalyst is prepared by adopting an impregnation method, an organic substance rich in hydroxyl, carboxyl and / or amido is introduced into impregnation liquid,the catalyst obtained after drying and roasting contains residual carbon, and the residual carbon covers part of acidic sites of a carrier aluminum oxide, so that when the catalyst is applied to hydrogenolysis of alpha,alpha-dimethylbenzyl alcohol to generate isopropyl benzene, excessive hydrogenation of the alpha,alpha-dimethylbenzyl alcohol and hydrogenation of acetophenone in organic materialscan be effectively inhibited, so that the isopropylbenzene selectivity is effectively improved, the ethylbenzene content in the product is controlled, the later separation cost is reduced, and the obtained catalyst has good stability in preparation of isopropylbenzene through alpha,alpha-dimethylbenzyl alcohol hydrogenolysis, and has a relatively high industrial application value.

Description

technical field [0001] The invention relates to a hydrogenation catalyst, in particular to a dimethyl benzyl alcohol hydrogenolysis catalyst and a preparation method thereof. Background technique [0002] As a downstream product of propylene, propylene oxide is mainly used in the production of polyether polyols, the precursors of polyurethane materials, and is an important organic chemical product. The production of propylene oxide by the CHP method is not affected by the price fluctuations of the co-products, and it has no pollution to the environment and less investment. It is an environmentally friendly and clean production process. It was first successfully developed by Sumitomo Chemical Company of Japan. The new process of producing PO with CHP as an oxidant includes There are cumene oxidation, propylene epoxidation, α,α-dimethylbenzyl alcohol hydrogenolysis and other processes. However, in the hydrogenolysis process of α,α-dimethylbenzyl alcohol, Cu-Cr catalyst is use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/44B01J37/02C07C1/22C07C15/085
CPCB01J23/44B01J37/0203C07C1/22C07C2523/44C07C15/085Y02P20/52
Inventor 吕宇皓刘仲能赵多马文迪
Owner CHINA PETROLEUM & CHEM CORP
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