High-efficiency hydrogenation catalyst and method for preparing same

A hydrogenation catalyst and catalyst technology, applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve the problems of increasing catalyst preparation or production costs, high active metals and auxiliary metals, and achieve high resistance to sintering Effects of deactivation ability, high catalytic activity and life, and production cost reduction

Active Publication Date: 2012-11-07
久泰能源(鄂尔多斯)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] At present, there is no lack of catalysts with copper as the active component in some published literature and patent documents, but the content of copper in the active component is relatively high, such as 30-60%; the content of auxiliary metals is also generally high, such as 5 -30%, although such a catalyst can achieve high reactant conversion and target product selectivity in the data description, but the high content of active metal and auxiliary metal will undoubtedly increase the preparation or production cost of the catalyst

Method used

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  • High-efficiency hydrogenation catalyst and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1: the preparation of efficient hydrogenation catalyst

[0042] Weigh 72g of copper nitrate and 0.7g of lanthanum nitrate and dissolve them in deionized water to prepare an aqueous solution with an ion concentration of 0.3M. Weigh 45.5g of urea and dissolve it in deionized water to prepare an aqueous solution with a concentration of 0.6M. Weigh 230g of the silica sol solution and adjust the pH value between 1-4 with nitric acid. Add the above-mentioned metal ion solution and urea solution into the silica sol solution (the order of adding the two is in no particular order), and stir to obtain a mixed solution. Transfer the mixed solution into a reaction flask, stir for 0.5-2.5 hours, then raise the temperature to 60-105° C. for reaction, the heating time is 0.8-1.2 hours, and the reaction time is 24 hours. After the reaction is completed, vacuum filter while it is hot, wash with deionized water and methanol or ethanol, and dry at 120°C for 12 hours. After d...

Embodiment 2

[0047] Embodiment 2: the preparation of efficient hydrogenation catalyst

[0048] Weigh 72g of copper nitrate and 14.5g of nickel nitrate and dissolve them in deionized water to form an aqueous solution with a total ion concentration of 0.3M. Weigh 45.5g of urea and dissolve it in deionized water to prepare an aqueous solution with a concentration of 0.6M. Weigh 230g of the silica sol solution and adjust the pH value between 1-4 with nitric acid.

[0049] The rest of the preparation process was the same as in Example 1, and the prepared catalyst had an active component content of 25%, an additive metal component content of 5%, and a carrier content of 70%. See attached table 1 for reaction process conditions and reaction results.

[0050] The catalyst has a relatively high conversion rate of dimethyl oxalate and selectivity of methyl glycolate, and the process is stable without obvious deactivation after running in a fixed-bed reactor for 300 hours.

Embodiment 3-5

[0051] Embodiment 3-5: Preparation of efficient hydrogenation catalyst

[0052] Others are identical with embodiment 2, by changing the add-on of nickel nitrate, be respectively 2.9g, 1.45g, 43.5g. See attached table 1 for reaction process conditions and reaction results.

[0053] The prepared catalyst has an active metal component content of 25%, a promoter metal component content of 0.5%, 1%, and 15%, and a carrier content of 74.5%, 74%, and 60%, respectively.

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Abstract

The invention discloses a high-efficiency hydrogenation catalyst and a method for preparing the high-efficiency hydrogenation catalyst. The high-efficiency hydrogenation catalyst comprises the following components by weight: 5-30% of active metal, 0-20% of auxiliary metal and 40-85% of carrier. The active metal is copper or copper oxide; the auxiliary metal is the composition of one or more than two of the sodium, aluminum, nickel, zinc, cobalt, manganese, cerium, lanthanum and strontium; and the carrier the silicon dioxide of silica sol or the aluminum oxide of pseudo-boehmite or aluminum salt. The high-efficiency hydrogenation catalyst is prepared by adopting the impregnation or precipitation method, and the urea is used as the precipitating agent. Compared with the prior art, the catalyst prepared under the condition that the content of the active metal and the auxiliary metal is low has high catalytic activity and long life. In addition, the catalyst has low preparation and production cost and can be universally used for preparing methyl glycolate, ethylene glycol and ethanol by catalytic hydrogenation and preparing 1,2-glycol from glycerin by hydrogenation.

Description

technical field [0001] The invention relates to the technical field of catalysts for hydrogenation of dimethyl oxalate to produce methyl glycolate, ethylene glycol, and ethanol, and hydrogenation of glycerol to produce 1,2-propanediol and 1,3-propanediol. Hydrogen catalyst and method for its preparation. Background technique [0002] Ethylene glycol is an important and strategic basic chemical raw material with a wide range of uses: Ethylene glycol reacts with terephthalic acid to produce polyethylene terephthalate, which can be used as a raw material for acetate fiber and polyester plastics , It is widely used in lubricants, plasticizers, paints, adhesives, surfactants, pesticides, explosives and other fields. Moreover, it can be used as solvent with special purpose, cement grinding aid, hydrating agent and solvent in tannery and pharmaceutical industries instead of glycerin. The traditional production method of ethylene glycol is the petrochemical route, that is, the eth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01J23/755B01J23/80B01J23/75B01J23/78B01J23/72C07C31/20C07C29/149C07C69/675C07C67/31C07C31/08C07C29/60
CPCY02P20/52
Inventor 李奇张晓龙李金发成国庭杜静刘建华
Owner 久泰能源(鄂尔多斯)有限公司
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