Catalyzer for preparing 1, 3-trimethylene glycol from 3-hydracrylic acid ester through hydrogenation and preparation method thereof

A catalyst, propylene glycol technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic chemistry, etc., can solve the problems of low catalyst life, poor stability, etc., and achieve simple preparation methods, easy to obtain low-cost raw materials, and easy operation. easy effect

Active Publication Date: 2008-05-14
SHANGHAI HUAYI ENERGY CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of existing catalysts with low service life and poor stability, and pr...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 10.0g Cu(NO 3 ) 2 ·3H 2 O was dissolved in 75ml of distilled water and the aqueous solution obtained was added dropwise with ammonia water under stirring. After the precipitation occurred, continue to add ammonia water and wait for the precipitation to dissolve to obtain dark blue solution A. Dissolve Cu(NO in 100ml of distilled water. 3 ) 2 ·3H 2 O 20.0g, Zn(NO 3 ) 2 ·6H 2 O16.7g made solution B. Mix solutions A and B under stirring at 20°C, and keep the temperature to continue the reaction for 2 hours, add 25ml of 0.5M ammonium hypophosphite aqueous solution, stir and react for 2 hours, then add silica sol (produced by Qingdao Ocean Chemical Factory, ammonia stable Type, silica content 25-26%, particle size 10-20nm) 26.3g, raise the temperature to 85°C, continue to stir for 6 hours, then age and filter, after the filtered material is dried at 120°C for 12 hours, add the powder Press forming, crushing and sieving to select particles with a size of 40-80 meshes,...

Embodiment 2

[0021] 10.0g Cu(NO 3 ) 2 ·3H 2 O was dissolved in 75ml of distilled water and the aqueous solution obtained was added dropwise with ammonia water under stirring state. After the precipitation occurred, continue to add ammonia water and wait for the precipitation to dissolve to obtain dark blue solution A. Dissolve Cu(NO in 50ml of distilled water. 3 ) 2 ·3H 2 O 10.0g, Zn(NO3 ) 2 ·6H 2 O 8.7g made solution B, mixed solution A and B under 35 ℃ stirring condition, and kept this temperature and continued to react for 2 hours, added 0.5M ammonium hypophosphite aqueous solution 5ml, stirred and reacted for 5 hours, added silica sol (Qingdao Produced by Haiyang Chemical Factory, remove cationic type, silica content 25-26%, particle size 10-200nm) 35.2g, raise the temperature to 75°C, continue to stir for 6 hours to age and filter, and dry the filtered material at 120°C for 12 hours Afterwards, the powder is pressurized, crushed and sieved again to select particles with a size o...

Embodiment 3

[0026] 18.0g Cu(C 2 h 3 o 2 ) 2 ·H 2 O is dissolved in 75ml of distilled water and the aqueous solution that obtains is added dropwise ammonium acetate solution under stirring state, continues to add ammonium acetate solution after precipitation occurs and waits for precipitation to dissolve and makes dark blue solution A, dissolves Cu(C in 100ml of distilled water 2 h 3 o 2 ) 2 ·H 2 O 15.0g, Zn(C 2 h 3 o 2 ) 2 ·H 2 O 6.0 g made solution B. Mix solutions A and B under stirring at 20°C, and keep the temperature to continue the reaction for 2 hours, add 3ml of 0.4M ammonium hypophosphite aqueous solution, stir and react for 3 hours, then add silica sol (produced by Qingdao Ocean Chemical Factory, ammonia stabilized Type, SiO 2 25-26%, particle size 10-20nm) 26.3g, raise the temperature to 70°C, continue stirring for 6 hours for aging. After filtering and drying at 120°C for 12 hours, the powder is pressed into shape, crushed and sieved again to select particles wi...

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Abstract

The invention relates to the technical field of catalysts, in particular to a catalyst for hydrogenating 3-hydroxypropionate to prepare 1,3-propanediol and a preparation method thereof. The catalyst of the present invention is composed of CuO, ZnO, P and SiO2 four components, and the weight percentage of each component is CuO 25%~60%, ZnO 1%~30%, P 0.01%~10%, SiO2 30%~60% %, the total amount of the four components satisfies 100%. The preparation method of the catalyst is to first complex the copper salt and the ammonium salt and then blend them with a salt solution containing a certain amount of Cu and Zn, then add ammonium hypophosphite and silica sol in turn, and undergo aging, filtration, drying, molding, and high-temperature roasting. The obtained catalyst can be used to hydrogenate 3-hydroxy propionate to prepare 1,3-propanediol after being reduced in a reactor. The catalyst preparation method of the invention is simple and convenient, has long service life, good stability and high selectivity of 1,3-propanediol.

Description

technical field [0001] The invention relates to the technical field of catalyst and its preparation, in particular to a catalyst for hydrogenating 3-hydroxypropionate to prepare 1,3-propanediol and a preparation method thereof. technical background [0002] 1,3-propanediol is an important organic chemical raw material, widely used in polymer production, such as thermoplastic polyurethane, copolyether, polytrimethylene terephthalate (PTT), etc., especially 1,3-propanediol and p- The PTT polyester fiber obtained by polymerizing methyl phthalate has more excellent properties than polyester materials synthesized by other diols, and has broad development prospects. In addition, 1,3-propanediol can also be used as organic synthesis intermediates such as solvents, antifreeze agents, protective agents and synthetic medicines. [0003] 1,3-propanediol production process route mainly contains 3 kinds: 3-hydroxypropionaldehyde synthetic 1,3-propanediol (ethylene oxide hydroformylation...

Claims

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Application Information

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IPC IPC(8): B01J27/182C07C31/20
Inventor 吕志果赵正康郭振美应于舟杨菊群张旭红冯看卡
Owner SHANGHAI HUAYI ENERGY CHEM
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