A benzene hydrogenation catalyst and a preparing method thereof

A catalyst and a technology for hydrogenation of benzene, which are applied in the direction of hydrogenation to hydrocarbons, chemical instruments and methods, and heterogeneous catalyst chemical elements, etc., can solve the problems of less industrial application of platinum-based catalysts, and achieve low prices and good active center dispersion performance , The effect of reducing the proportion of micropores

Inactive Publication Date: 2017-08-29
QINZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Nickel-based catalysts are widely used, but the industrial application of platinum-based catalysts is less, so the present invention mainly provides a platinum-based catalyst and its preparation method for the hydrogenation of benzene to produce cyclohexane

Method used

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  • A benzene hydrogenation catalyst and a preparing method thereof
  • A benzene hydrogenation catalyst and a preparing method thereof
  • A benzene hydrogenation catalyst and a preparing method thereof

Examples

Experimental program
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Embodiment 1

[0029] First, 8.0 g of the water-soluble chitosan pore-enlarging agent was added to deionized water at 50° C., and then acetic acid was added dropwise until the chitosan was completely dissolved to obtain an acid solution containing the pore-enlarging agent. Weigh a certain amount of tin nitrate, lanthanum nitrate and potassium carbonate respectively, completely dissolve tin nitrate, lanthanum nitrate and potassium carbonate in 70g of distilled water to form an aqueous solution containing tin, lanthanum and potassium. Weigh 350g of pseudo-boehmite powder and 20.0g of fennel powder into the kneader, and mix evenly, then add the mixed solution of tin nitrate, lanthanum nitrate and potassium carbonate, and finally add the acid solution containing chitosan to the pseudo-boehmite The boehmite powder is evenly kneaded, and then kneaded-extruded into a clover shape. Dry at 120° C. for 8 hours, and calcined at 700° C. for 4 hours to obtain an alumina carrier 1 containing tin, lanthanu...

Embodiment 2

[0032]Add 8.0 g of the water-soluble chitosan pore-enlarging agent into deionized water at 50° C., and then add acetic acid dropwise until the chitosan is completely dissolved to obtain an acid solution containing the pore-enlarging agent. Weigh a certain amount of tin nitrate, lanthanum nitrate and potassium carbonate respectively, completely dissolve tin nitrate, lanthanum nitrate and potassium carbonate in 70g of distilled water to form an aqueous solution containing tin, lanthanum and potassium. Weighing 350g pseudo-boehmite powder and 20.0g fenugreek powder join in the kneader, and mix evenly, then add the mixed solution of tin nitrate, lanthanum nitrate and salt of wormwood, finally the acid solution containing chitosan is added to The pseudo-boehmite powder is evenly kneaded, and then kneaded-extruded into a clover shape. Dry at 120° C. for 8 hours, and calcined at 700° C. for 4 hours to obtain an alumina carrier 2 containing tin, lanthanum and potassium. SnO in carrie...

Embodiment 3

[0036] The preparation method of the carrier was carried out according to Example 1. The difference is that the water-soluble chitosan pore-enlarging agent is replaced by the non-water-soluble chitosan pore-enlarging agent, and the chitosan formic acid solution is stirred with a magnetic stirrer for 30 minutes to obtain the alumina carrier 3 with a macroporous structure. The content of auxiliary components tin, lanthanum and potassium in the carrier accounts for the percentage of the carrier mass, respectively SnO 2 1.5wt%, La 2 o 3 0.8wt% and K 2 O 2.8 wt%. Its specific surface area and pore size distribution are shown in Table 1.

[0037] Get chloroplatinic acid and palladium nitrate and join in 30ml distilled water, add ammoniacal liquor to adjust the pH value at 3.0, then dilute with deionized water, make impregnating liquid and impregnate spherical alumina carrier 100g with macroporous structure, the catalyst precursor that obtains is in After drying at 120°C for 6 ...

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Abstract

A benzene hydrogenation catalyst and a preparing method thereof are disclosed. The catalyst includes, based on mass of oxides, 90.3-97 wt% of an alumina carrier having a macroporous structure and adopting chitosan as a pore-enlarging agent, 0.2-4.9 wt% of an active component that is platinum oxide and 0.2-4.8 wt% of an active component that is palladium oxide. The macroporous alumina carrier comprises auxiliary components which are tin, lanthanum and potassium. The catalyst has high benzene hydrogenation activity, the rate of loss of precious metal active components is low, and an operation cycle is long.

Description

technical field [0001] The invention belongs to the technical field of hydrogenation catalysts, and in particular relates to a benzene hydrogenation catalyst and a preparation method thereof, more specifically to a benzene hydrogenation catalyst with a macroporous structure of alumina as a carrier and a preparation method thereof. Background technique [0002] One of the main raw materials for the production of caprolactam is cyclohexane, which is mainly prepared by hydrogenation of benzene, accounting for about 90%, in addition to fractionation of naphtha and isomerization of methylcyclopentane. As caprolactam is widely used and its demand is increasing, the production of its main raw material, cyclohexane, is becoming more and more important. [0003] The production process of benzene hydrogenation to prepare cyclohexane mainly includes gas-solid fixed bed and gas-liquid-solid three-phase suspended bed reaction system. The fixed bed gas-solid reaction system is widely used...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/63B01J23/14C07C5/10C07C13/18
CPCB01J23/002B01J23/14B01J23/63B01J35/1019B01J35/1047B01J35/1061B01J35/1066B01J2523/00C07C5/10C07C13/18B01J2523/13B01J2523/3706B01J2523/43B01J2523/824B01J2523/828
Inventor 晁会霞罗祥生贾贞健龚雨霜
Owner QINZHOU UNIV
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