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Hydrogenation catalyst, and preparation method and application thereof

A technology of hydrogenation catalyst and auxiliary agent, which is applied in the field of hydrogenation of adiponitrile, can solve the problems of activity decline and other problems, and achieve the effects of easy separation, high activity and neutrality, and simple preparation process

Active Publication Date: 2017-10-03
SINOPEC YANGZI PETROCHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the activity of the catalyst decreased significantly after being used for 6 times

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh 25g of nickel nitrate, 5g of copper sulfate, 1g of cerium nitrate, 2g of magnesium chloride, 24g of sodium lauryl sulfate, and 76g of urea and dissolve them in 45ml of water to form a mixed solution. Stir at room temperature for 2-10 hours to form a clear solution. Transfer the resulting clear solution to a constant temperature water bath at 80-100°C for 6-10 hours. The precipitate formed after the reaction was filtered and washed. The washed precipitate was dried overnight at 100-120°C and calcined at 400-500°C for 5h. The calcined solid powder is pressed into tablets and crushed into a catalyst with a particle size of 20-40 mesh. After the catalyst is reduced in a hydrogen atmosphere, the particle size is 17.4nm measured by an X-ray diffractometer. and porosity analyzer to measure the adsorption volume under different adsorption pressures, and calculate the surface area of ​​the catalyst by the BET equation to be 25.8m 2 / g.

[0031] Add 2g of the reduced cat...

Embodiment 2

[0033]Weigh 25g of nickel chloride, 5g of cobalt sulfate, 5g of sodium molybdate, 1g of ferrous chloride, 1g of silver nitrate, 2g of barium nitrate, 20g of polyethylene glycol, and 54g of urea in 100ml of water to form a mixed solution. Stir for 2-10h to generate a clear solution. Transfer the resulting clear solution to a constant temperature water bath at 80-100°C for 6-10 hours. The precipitate formed after the reaction was filtered and washed. The washed precipitate was dried overnight at 100-120°C and calcined at 400-500°C for 5h. The calcined solid powder is pressed into tablets and crushed into a catalyst with a particle size of 20-40 mesh. After the catalyst is reduced in a hydrogen atmosphere, the particle size is 16.7nm measured by an X-ray diffractometer. And the porosity analyzer measures the adsorption volume under different adsorption pressures, and the surface area of ​​the catalyst is calculated by the BET equation to be 26.4m 2 / g.

[0034] Take 2g of the...

Embodiment 3

[0036] Weigh 10g of nickel sulfate, 4g of sodium molybdate, 5g of zinc chloride, 2g of aluminum nitrate, 2g of calcium nitrate, 24g of sodium lauryl sulfate, and 64g of urea in 50ml of water to form a mixed solution, and stir at room temperature for 2-10 hours A clear solution was produced. Transfer the resulting clear solution to a constant temperature water bath at 80-100°C for 6-10 hours. The precipitate formed after the reaction was filtered and washed. The washed precipitate was dried overnight at 100-120°C and calcined at 400-500°C for 5h. The calcined solid powder is pressed into tablets and crushed into a catalyst with a particle size of 20-40 mesh. After the catalyst is reduced in a hydrogen atmosphere, the particle size is 15.2nm measured by an X-ray diffractometer. And the porosity analyzer measures the adsorption volume under different adsorption pressures, and the surface area of ​​the catalyst is calculated by the BET equation to be 29.4m 2 / g. .

[0037] Ad...

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Abstract

The invention discloses a hydrogenation catalyst, and a preparation method and application thereof, belonging to the field of hydrogenation of adiponitrile. The hydrogenation catalyst comprises the following components in percentage by mass: 60-90% of active component, 1-30% of aid and 1-10% of at least one metal selected from Group IIA metals. The preparation method comprises the following steps: preparing a mixed solution from the components, putting the mixed solution in an 80-110-DEG C environment, and performing reaction for 1-8 hours to obtain the hydrogenation catalyst. The hydrogenation catalyst is applied to reduction reaction. The hydrogenation catalyst has the advantages of small particle size, uniform particle size distribution (15-18nm), large specific area (up to 25-30 m<2> / g), high hydrogenation activity, favorable selectivity, low price, simple preparation technique, easy operation process and low requirements for processing equipment, and can be easily separated from the product after the reaction finishes. The hydrogenation catalyst is applicable to tank reactors, fluidized bed reactors and fixed bed reactors, and thus, has favorable adaptability to equipment.

Description

technical field [0001] The invention belongs to the field of hydrogenation of adiponitrile, and in particular relates to an easy-to-separate high-efficiency mesoporous hydrogenation catalyst, a preparation method and an application thereof. Background technique [0002] Hexamethylenediamine is a widely used organic chemical intermediate, mainly used in the production of polyamides, such as PA66, PA610, PA6T, etc.; it can also be used to synthesize diisocyanate or curing agent for epoxy resin and urea-formaldehyde resin, organic crosslinking agent etc. Especially in synthetic fibers and engineering plastics, the demand for hexamethylenediamine compounds continues to increase, the price of hexamethylenediamine continues to rise, and there is a large gap between market supply and demand. [0003] At present, the production processes of hexamethylenediamine mainly include butadiene method and catalytic hydrogenation method of adiponitrile. The butadiene method is currently onl...

Claims

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Application Information

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IPC IPC(8): B01J23/83B01J23/89B01J23/887B01J23/75C07C209/48C07C211/12
CPCB01J23/78B01J23/83B01J23/8873B01J23/892C07C209/48C07C211/12
Inventor 魏延雨孙海龙
Owner SINOPEC YANGZI PETROCHEM
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