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Preparation method of hydrogenation catalyst

A hydrogenation catalyst and catalyst technology, applied in the preparation of organic compounds, chemical instruments and methods, preparation of hydroxyl compounds, etc., can solve the problems of easy aggregation of active metals, affecting catalyst activity and product conversion rate, etc., to save washing steps, The effect of saving clean water and avoiding environmental pollution

Active Publication Date: 2014-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the catalyst is prepared by the impregnation method, the active metal is easy to aggregate, which affects the activity of the catalyst and the conversion rate of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Take 130.5g Cu(NO 3 ) 2 . 3H 2 O and 660g Al(NO 3 ) 3 9H 2 O was prepared into 1000mL solution I, heated to 45°C, and set aside;

[0029] (2) Take 304.4g Cu(NO 3 ) 2 . 3H 2 O, 298.1g Zn(NO 3 ) 3 . 6H 2 O and 150.4g Mn(NO 3 ) 2 Prepare 1000mL solution II, heat to 65°C, and set aside;

[0030] (3) At 45°C, add 200mL of bottom water to the reaction tank, add solution I and precipitant ammonia water (molar concentration is 4.98mol / L) side-by-side to add co-precipitation, and keep the pH value of the precipitation system at 5.4, drop Continue stirring at constant temperature for 90 minutes after the addition is complete,

[0031](4) Heat the precipitation system to 65°C, add solution II and precipitant ammonia water (molar concentration: 4.98mol / L) solution co-currently to it, and keep the pH value of the precipitation system at 6.6, after the co-current addition is completed , stirring at constant temperature for 100 minutes,

[0032] (5) The materia...

Embodiment 2

[0034] Other conditions are the same as embodiment 1, just change the precipitation agent of two-step reaction into ammonium carbonate solution, prepare catalyst A 2 .

Embodiment 3

[0036] (1) Take 130.5g Cu(NO 3 ) 2 . 3H 2 O and 470g Al(NO 3 ) 3 9H 2 O was prepared into 1000mL solution I, heated to 40°C, and set aside;

[0037] (2) Take 304.4g Cu(NO 3 ) 2 .3H 2 O, 213g Zn(NO 3 ) 3 . 6H 2 O and 176.6 g MgN 2 o 6 Prepare 1000mL solution II, heat to 60°C, and set aside;

[0038] (3) At 40°C, add 200mL of bottom water to the reaction tank, add solution I and precipitant ammonia water (molar concentration is 4.98mol / L) side-by-side to add co-precipitation, and keep the pH value of the precipitation system at 5.4, drop Continue stirring at constant temperature for 90 minutes after the addition is complete,

[0039] (4) Heat the precipitation system to 60°C, add solution II and precipitant ammonia water (molar concentration: 4.98mol / L) solution to it concurrently and dropwise, and keep the pH value of the precipitation system at 7.5, after the concurrent dropwise addition , stirring at constant temperature for 100 minutes,

[0040] (5) The ma...

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PUM

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Abstract

The invention discloses a preparation method of a hydrogenation catalyst. The catalyst is a Cu-Al-Zn-M-O catalyst, wherein the M represents one or more components selected from: Ba, Mn, Mg, Ti, and Cr. The hydrogenation catalyst is prepared through a two-step parallel-flow precipitation method, namely subjecting a solution containing Cu, Al and a precipitant and a solution containing Cu, Zn, M, and a precipitant to a parallel-flow precipitation treatment under different conditions so as to obtain the hydrogenation catalyst. The hydrogenation catalyst is suitable for being used during the process of hydrogenation preparation of 1,4-butanediol from dimethyl maleate, and the reaction activity, reaction selectivity and stability of the catalyst are all improved.

Description

technical field [0001] The invention relates to a method for preparing a hydrogenation catalyst, in particular to a method for preparing a hydrogenation catalyst by hydrogenating dimethyl maleate to prepare 1,4-butanediol and co-producing tetrahydrofuran and gamma-butyrolactone. Background technique [0002] 1,4-Butanediol is an important and rapidly developing basic organic synthesis raw material in recent years. PU). In recent years, due to the rapid growth in the demand for thermoplastic elastic fibers and elastomers, the demand for PTMEG (polytetramethylene ether glycol) and PTMG (polytetrahydrofuran ether) as monomers is strong, making the upstream raw material 1,4-butanedi The demand for alcohol is also growing rapidly, and major 1,4-butanol producers in the world, such as BASF and DUPON, have expanded their production capacity. Tetrahydrofuran is an excellent solvent and an important organic chemical raw material. Its biggest application is polycondensation with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J23/80B01J23/86C07C29/149C07C31/20C07D307/08C07D307/33
Inventor 付秋红高鹏张艳侠段日包洪洲
Owner CHINA PETROLEUM & CHEM CORP
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