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Catalyst for producing tetrahydronaphthalene through selective hydrogenation of naphthalene and preparation method of catalyst

The technology of naphthalene selectivity and catalyst is applied in the field of catalyst and production technology for producing tetrahydronaphthalene by highly selective hydrogenation of naphthalene, and can solve the problem of low tetralin selectivity, complicated preparation process, and easy poisoning and deactivation of naphthalene conversion of the catalyst. rate, etc.

Active Publication Date: 2018-07-27
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the problems of cumbersome catalyst preparation process, easy poisoning and deactivation of the catalyst and low conversion rate of naphthalene and low selectivity of tetrahydronaphthalene in the existing technology of selective hydrogenation of naphthalene to produce tetrahydronaphthalene, the present invention provides a highly selective hydrogenation of naphthalene Hydrogen produces the catalyst of tetralin, and this catalyst can make the conversion rate of naphthalene higher than 95% while solving the above-mentioned problems, and the selectivity of tetralin tends towards 100%, reaches the purpose of producing tetralin with high selectivity, Thereby significantly improving separation and purification efficiency and reducing production costs

Method used

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  • Catalyst for producing tetrahydronaphthalene through selective hydrogenation of naphthalene and preparation method of catalyst

Examples

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Embodiment 1

[0015] This example illustrates the method of the invention.

[0016] Take 35.3g of ammonium heptamolybdate (0.2molMo) and 75.0g of aluminum nitrate (0.2molAl), add 500ml of deionized water and 100ml of ammonia water into a high-pressure hydrothermal reactor, react at 150°C for 2 hours, and cool naturally after the reaction , take out the product and filter it with suction, put the filter cake in an oven and dry it at 120°C for 12 hours under a nitrogen atmosphere to obtain Al 10 Mo 10 Complex. Take a certain amount of Al 10 Mo 10 The compound is mixed with a binder, and the metal content is 80% based on metal oxide, and it is made into a paste, kneaded and extruded to make a strip with a diameter of 1.6mm, dried under an infrared lamp for 5 hours, and placed in an oven in a nitrogen atmosphere at 120 ° C for 5 hours to prepare the catalyst Al 10 Mo 10 .

Embodiment 2

[0018] Take 35.3g of ammonium heptamolybdate (0.2molMo) and 146.7g of tetraethylorthosilicate (0.2molSi), add 500ml of deionized water and 100ml of ammonia water into a high-pressure hydrothermal reaction kettle, and react at 150°C for 2h. Cool naturally after the end, take out the product and filter it with suction, put the filter cake in an oven and dry it at 120°C for 12 hours under a nitrogen atmosphere to obtain Si 10 Mo 10 Complex. Take a certain amount of Si 10 Mo 10 The compound is mixed with a binder, and the metal content is 80% based on metal oxide, and it is made into a paste, kneaded and extruded to make a strip with a diameter of 1.6mm, dried under an infrared lamp for 5 hours, and placed in an oven and dried at 120°C for 5 hours under a nitrogen atmosphere to obtain the catalyst Si 10 Mo 10 .

Embodiment 3

[0020] Take 35.3g of ammonium heptamolybdate (0.2molMo), 1.3g of basic nickel carbonate (0.01molNi), 71.3g of aluminum nitrate (0.19molAl), add 500ml of deionized water, and 100ml of ammonia water into the high-pressure hydrothermal reaction kettle , react at 150°C for 2 hours, cool naturally after the reaction, take out the product and filter it with suction, put the filter cake in an oven and dry it at 120°C for 12 hours under a nitrogen atmosphere to obtain Ni 0.5 al 9.5 Mo 10 Complex. Take a certain amount of Ni 0.5 al 9.5 Mo 10The compound is mixed with a binder, and the metal content is 80% based on metal oxide, and it is made into a paste, kneaded and extruded to make a strip with a diameter of 1.6mm, dried under an infrared lamp for 5 hours, and placed in an oven Dry at 120°C for 5 hours under a nitrogen atmosphere to prepare the catalyst Ni 0.5 Al 9.5 Mo 10 .

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Abstract

The invention relates to a catalyst for producing tetrahydronaphthalene with industrial naphthalene as a raw material and a preparation method of the catalyst. The catalyst is a vulcanized NixAlySizMo10 compound metal catalyst and is prepared with a hydro-thermal synthesis method. The catalyst has very high naphthalene conversion rate and tetrahydronaphthalene selectivity, test results prove thatin a steady-state fixed bed reactor, under the conditions of the hydrogen pressure of 1-10 MPa, the reaction temperature of 200-360 DEG C and the liquid hourly space velocity of 1-10 h<-1>, the naphthalene conversion rate is higher than 95%, the naphthalene selectivity tends to be 100%, and the long-cycle operation performance of the catalyst is good. The preparation method of the catalyst is simple, and the catalyst resists S and N poisoning and is applicable to preparation of tetrahydronaphthalene through selective hydrogenation of industrial naphthalene containing more impurities.

Description

technical field [0001] The invention relates to a method for selective hydrogenation of naphthalene, in particular to a catalyst for producing tetrahydronaphthalene by highly selective hydrogenation of naphthalene and a production process thereof. Background technique: [0002] my country is rich in coal resources, and coal tar can be fractionated to obtain naphthalene. It can be said that naphthalene resources are very rich, and tetrahydronaphthalene is an important derivative of naphthalene, and it is also a very important chemical raw material. Tetrahydronaphthalene (also known as tetrahydronaphthalene, tetralin), is an alicyclic aromatic hydrocarbon. Tetralin is widely used in industrial fields such as medicine, paint, paint, ink and paper making. Tetrahydronaphthalene can be used as an excellent high-boiling organic solvent due to its extremely high boiling point and super solvency, and can be used as a fuel for internal combustion engines in mixtures with benzene and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/28B01J23/883B01J37/10C07C5/11C07C13/48
CPCB01J23/002B01J23/28B01J23/883B01J37/10B01J2523/00C07C5/11C07C2523/28C07C2523/883C07C2602/10B01J2523/31B01J2523/41B01J2523/68B01J2523/847C07C13/48
Inventor 殷长龙李凡刘晨光赵会吉刘宾刘东柴永明柳云骐赵瑞玉张孔远
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)