Method for improving selectivity and stability of nickel liquid phase hydrogenation catalyst

A liquid-phase hydrogenation and catalyst technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc. problems such as decline and affecting the operation of production units, to achieve the effects of high selectivity, high activity and good stability

Active Publication Date: 2015-11-25
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Research on octenal liquid-phase hydrogenation catalysts has been carried out in the Research Institute of China Jilin Chemical Industry Co., Ltd. The catalysts developed have been applied to the butanol plant of Jilin Chemical Industry Co., Ltd. Fertilizer Plant, but the activity and selectivity of the catalysts have not yet reached In the ideal state, especially the selectivity drops sharply with the extension of the running time, which seriously affects the operation of the production device

Method used

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  • Method for improving selectivity and stability of nickel liquid phase hydrogenation catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Take 800 grams of water glass and add 3 liters of water, heat it to 50°C in a sedimentation tank with stirring, take 334 grams of nickel nitrate hexahydrate and add 3 liters of water to make a solution, add 35 grams of magnesium nitrate, and evenly drop into the water glass solution for For co-precipitation, control the precipitation temperature to about 50°C, neutralize for 15 minutes, and adjust the pH to 7.0 with oxalic acid. Then, it was stirred and aged at 60°C for 30 minutes, washed, filtered, dried to plastic humidity, kneaded with 3.0 g of methyl cellulose, extruded, and calcined at 600°C for 2 hours to obtain catalyst sample 1.

Embodiment 2

[0023] Take 800 grams of water glass and add 3 liters of water, heat it to 60°C in a sedimentation tank with stirring, take 300 grams of nickel nitrate hexahydrate and add 3 liters of water to form a solution, add 35 grams of calcium nitrate, and evenly drop into the water glass solution for For co-precipitation, control the precipitation temperature to about 60°C, neutralize for 20 minutes, and adjust the pH to 7.2 with oxalic acid. Stir and age at 70°C for 30 minutes, wash, add 59 grams of zirconia to beat, filter, dry to plastic humidity, add 3.0 grams of methyl cellulose, knead, extrude, and roast at 400°C for 2 hours to obtain the catalyst sample 2.

Embodiment 3

[0025] Take 800 grams of water glass and add 3 liters of water, heat it to 80°C in a sedimentation tank with stirring, take 300 grams of nickel nitrate hexahydrate and add 3 liters of water to form a solution, and evenly drop it into the water glass solution for co-precipitation, and control the precipitation temperature At about 80°C, the neutralization time is 30 minutes, and the pH is adjusted to 8.0 with oxalic acid. Then it was stirred and aged at 80°C for 20 minutes, washed, filtered, and dried to a plastic humidity, added 59 grams of sodium carbonate and 3.0 grams of methyl cellulose, kneaded, extruded, and calcined at 600°C for 2 hours to obtain catalyst sample 3.

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Abstract

The invention belongs to the technical field of catalysts, and particularly relates to a method for improving the selectivity and the stability of a nickel liquid phase hydrogenation catalyst. The method is suitable for preparing the nickel liquid phase hydrogenation catalyst through co-precipitation. A soluble salt addition agent is supplied to nickel salt in a neutralizing process, soluble salt contains one or several kinds of magnesium nitrate, chromic nitrate, zirconium nitrate, calcium nitrate, lanthanum nitrate and cesium nitrate, and the supplying amount of the soluble salt is 0-0.95 time of the molar weight of the nickel salt. An alkali center adjusting addition agent of the catalyst is added to a filter cake, the alkali center adjusting addition agent and the filter cake are uniformly kneaded, the alkali center adjusting addition agent contains one or several kinds of oxide, hydroxide, metasilicate, carbonate and aluminosilicate of potassium, calcium, sodium, magnesium, zirconium and cesium, and the addition amount of the alkali center adjusting addition agent is 0-0.95 time of the molar weight of precipitated nickel. The method disclosed by the invention can obviously improve the selectivity and the stability of the catalyst.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a method for improving the selectivity and stability of a nickel-based liquid-phase hydrogenation catalyst. Background technique [0002] Nickel-based catalysts have also been widely used in the field of aldehyde hydrogenation due to their low hydrogenation activity temperature and low operating energy consumption. In the early high-pressure process for preparing butanol and octanol, Ni-based catalysts were mostly used for liquid-phase hydrogenation, and the operating pressure was relatively high. With the development of the chemical industry, a series of catalysts with Ni as the main active component were developed around 1990. aldehyde hydrogenation catalyst. [0003] Research on octenal liquid-phase hydrogenation catalysts has been carried out in the Research Institute of China Jilin Chemical Industry Co., Ltd. The catalysts developed have been applied to the bu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/78B01J23/755
Inventor 吴结华孙中华殷玉圣魏士新张觅秦丽珍纪容昕孙远龙
Owner CHINA PETROLEUM & CHEM CORP
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