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Catalyzer for hydrogenization of nano nickel and its preparation method

A nano-nickel hydrogenation catalyst, catalyst technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve high cost, loss, complex preparation process, etc. problem, to achieve the effect of low cost, easy application and improved hydrogenation performance

Inactive Publication Date: 2003-12-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The nickel hydrogenation catalyst prepared by the impregnation method in the prior art has high nickel content, complicated preparation process, high cost, and problems such as environmental pollution; the application field of the nanoscale nickel alloy catalyst is limited, such as cannot be used for fixed bed reaction, and also There are engineering problems, such as separation, loss, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 278 grams of pseudohydroboehmite alumina (dry basis 72%, pore volume 0.513ml / g, specific surface area 194m 2 / g) and 250 grams (dry basis 20%) of the adhesive made of alumina are put into a roller compactor, add an appropriate amount of water, mix and grind for 1 hour, and grind into an extrudable paste with a diameter of 0.5mm and a length of 4 -6mm. The extruded strips were dried at 110°C and calcined at 550°C for 4 hours. The nano-nickel powder of 20-50nm is prepared by the hydrogen arc method and the above-mentioned roasted strip is placed in a rotating glass container, and the nano-nickel powder is evenly coated on the surface of the carrier strip by mechanical vibration. It was then fired at 500°C for 4 hours. The nickel particle size on the surface of the catalyst is between 20-50nm and the nickel content of the catalyst is 4.5m% as detected by a high-resolution electron microscope (HRTEM). The catalyst number is NHC-1C.

Embodiment 2

[0023] 83.3 grams of pseudohydroboehmite alumina (dry basis 72%, pore volume 0.513ml / g, specific surface area 194m 2 / g), 28.6 grams of amorphous silica-alumina (pore volume 2.80ml / g, specific surface area 280m 2 / g, dry basis 70%), 100 grams of binder (dry basis 20%) mixed and milled for 1 hour, and rolled into extrudable paste, extruded bar diameter 0.5mm, length 4-6mm. The extruded strips were dried at 110°C and calcined at 550°C for 4 hours. The nano-nickel powder of 20-50nm is prepared by the hydrogen arc method and the above-mentioned roasted strip is placed in a rotating glass container, and the nano-nickel powder is evenly coated on the surface of the carrier strip by mechanical vibration. It was then fired at 500°C for 4 hours. The nickel particle size on the surface of the catalyst is between 20-50nm and the nickel content of the catalyst is 4.3m% as detected by a high-resolution electron microscope (HRTEM). The catalyst number is NHC-1C. The catalyst number is N...

Embodiment 3

[0027] catalyst

[0028] It can be seen from the results in the table that NHC-1 and NHC-2 have better hydrogenation activity than RC-1 catalyst.

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PUM

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Abstract

A nanometer nickel hydrogenation catalyst and a preparation method thereof belong to the field of nickel hydrogenation catalysts. The nickel hydrogenation catalyst prepared by the impregnation method in the prior art has high metal content, low activity and high cost, and the nickel alloy nano catalyst cannot be used in the fixed bed reaction process. The catalyst of the present invention solves the above problems. The catalyst of the present invention is composed of a carrier bar composed of nano-nickel and alumina or alumina mixed with amorphous silica-alumina. The nano-nickel is mainly distributed on the outer surface of the carrier, and the nickel content in the catalyst is 3-6m%. The catalyst of the invention uniformly coats the nanometer nickel powder on the surface of the carrier bar by mechanical vibration method, and then bakes and solidifies. The catalyst of the present invention can be used in hydrogenation reaction processes, such as hydrogenation reactions of aromatic hydrocarbons, solvent oil hydrogenation and the like.

Description

1. Technical field [0001] The invention relates to a hydrogenation catalyst and a preparation method thereof, in particular to a nano-nickel hydrogenation catalyst and a preparation method thereof. The invention belongs to the technical field of nickel hydrogenation catalysts, in particular to the technical field of nanoscale nickel hydrogenation catalysts. 2. Background technology [0002] Due to Ni / Al 2 o 3 These catalysts have high hydrogenation activity and are widely used in hydrogenation reactions such as aromatics hydrogenation and solvent oil hydrogenation. Ni / Al 2 o 3 Catalysts are generally prepared by co-precipitation, impregnation or kneading, and the nickel source used is generally nickel chloride, nickel nitrate, etc., and the Cl produced during the preparation - , NO x Will pollute the environment. The nickel content of the catalyst prepared by the above method is relatively high, generally 15-50m%. [0003] USP4490480 intro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/755C10G45/06
Inventor 丁连会胡永康
Owner CHINA PETROLEUM & CHEM CORP