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Catalyst for hydrogenation of ester, preparation method and application thereof

A technology for hydrogenation of catalysts and esters, applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve the problems of less side reactions, high pressure, low space velocity, etc., and achieve less side reactions and high selectivity High, high airspeed effect

Active Publication Date: 2022-02-08
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a kind of ester hydrogenation catalyst and preparation method thereof, and apply it to the catalytic hydrogenation of dialkyl adipate to prepare 1,6-hexanediol, which can overcome the problem of using current catalysts for hydrogenation The problem of high pressure and low space velocity during the reaction, but also has the advantages of less side reactions, high product selectivity, high product yield, etc., easy to realize continuous production and no corrosion to equipment, etc.

Method used

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  • Catalyst for hydrogenation of ester, preparation method and application thereof
  • Catalyst for hydrogenation of ester, preparation method and application thereof
  • Catalyst for hydrogenation of ester, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Dissolve 83.02g of sodium hydroxide (NaOH) in 2100ml of distilled water to form an alkaline solution. 17.92g aluminum nitrate (Al(NO 3 ) 3 9H 2 O) Dissolve in 48ml of distilled water, add the alkali solution dropwise to the aluminum nitrate solution under heating and stirring, until the pH value of the solution reaches 8, stop the dropwise addition, leave to age for 0 hour, and obtain the suspension A. 81.58g zinc chloride (ZnCl 2 ) and 600ml of water are added into the suspension A, and the zinc chloride solution is evenly stirred. Under heating and stirring, the alkali solution is added dropwise to the mixed solution until the pH value of the solution reaches 8, and the dripping is stopped. Standing and aging for 4 hours, suspension B was obtained. 75.39g copper acetate (C 4 h 6 CuO 4 ·H 2 O) the copper acetate solution that 377ml water is made into joins in the suspension B, stirs, and under heating and stirring condition, alkali solution is added dropwise in...

Embodiment 2

[0036] 60.29g sodium hydroxide (NaOH) and 79.88g sodium carbonate (NaOH) 2 CO 3 ) was dissolved in 2260ml of distilled water to prepare an alkaline solution. 122.58g aluminum chloride (AlCl 3 ·6H 2 O) be dissolved in 507ml of distilled water, under the condition of heating and stirring, the alkali solution is added dropwise in the aluminum chloride solution, until the pH value of the solution reaches 8, stop the dropwise addition, leave it to stand and age for 4 hours to obtain the suspension A. 157.55g zinc nitrate (N 2 o 6 Zn·6H 2 0) The zinc nitrate solution made with 530ml water joins in the suspension A, stirs, under heating and stirring condition, alkali solution is added dropwise in this mixed solution, until the solution pH value reaches 8, stop dripping, Standing and aging for 4 hours, suspension B was obtained. 52.36g copper nitrate (Cu(NO 3 ) 2 ·3H 2 O) the copper nitrate solution that 217ml water is made into joins in the suspension B, stirs, and under he...

Embodiment 3

[0038] 140.67g sodium carbonate (Na 2 CO 3 ) was dissolved in 1330ml of distilled water to form an alkaline solution. 26.52g basic aluminum acetate (Al(OH)C 4 h 6 o 4 ) and 13.26g aluminum sulfate (Al 2 (SO 4 ) 3 18H 2 O) Dissolve in 203ml of distilled water, add the alkali solution dropwise to the aluminum salt solution under the condition of heating and stirring until the pH value of the solution reaches 8, stop the dropwise addition, leave it to stand and age for 2 hours to obtain the suspension A. 22.49g zinc acetate (C 4 h 6 o 4 Zn·2H 2 O) the zinc salt solution that 103ml water is made into joins in the suspension A, stirs, and under heating and stirring condition, alkali solution is added dropwise in this mixed solution, until the solution pH value reaches 8, stop dripping, Standing and aging for 0 hour, suspension B was obtained. 117.14g copper sulfate (CuSO 4 ) and 734ml of water were added into the suspension B, and stirred evenly. Under heating and sti...

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Abstract

The invention belongs to the technical field of catalyst preparation, and in particular relates to a catalyst for hydrogenation of esters containing no precious metals and a preparation method thereof. The catalyst can be well applied to the hydrogenation of dimethyl adipate to prepare 1,6-hexane diol. When it is applied to the catalytic hydrogenation of dialkyl adipate to prepare 1,6-hexanediol, the hydrogenation reaction pressure is low, the space velocity is high, and side reactions are few, the selectivity of ester hydrogenation products is high, and the product yield is high. High efficiency, easy to achieve continuous production and no corrosion to equipment and many other advantages.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to a catalyst for hydrogenation of esters containing no precious metals and a preparation method thereof. The catalyst can be well applied to the hydrogenation of dimethyl adipate to prepare 1,6-hexane diol. Background technique [0002] 1,6-Hexanediol is an important diol with unique properties and a wide range of uses. It can be used in various fields such as coatings, polyester, and polyurethane. It can modify polyester and polyurethane to improve the water resistance and alkali resistance of the material, and can improve the elasticity and mechanical strength of the material. In addition, 1,6-hexanediol can also be used to synthesize plasticizers, which are used in many fields such as medicine and pesticides. It is a chemical product with huge market potential. [0003] The preparation methods of 1,6-hexanediol mainly include hydroformylation method, 1...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/80C07C29/149C07C31/20
CPCB01J23/80C07C29/149C07C31/20
Inventor 徐丽杨幸川刘国际
Owner ZHENGZHOU UNIV
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