Preparation method of CuBiMgSi catalyst for synthesizing butynediol

A butynediol and catalyst technology, which is applied in the field of CuO-Bi2O3-MgO-SiO2 catalyst preparation, can solve the problems of short catalyst life and failure to realize industrial application, and achieve high price, high raw material cost and cost reduction Effect

Active Publication Date: 2018-05-08
大连瑞克科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the life of the catalysts is relatively short, and industrial applications have not been realized.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1A: Weigh 13.1g Bi(NO 3 ) 3 .5H 2 O and 99.7g Cu(NO 3 ) 2 .3H 2 O is dissolved to make a 1mol / L aqueous solution. Sodium carbonate and copper-bismuth solution with a concentration of 1 mol / L are mixed in parallel at 55°C under stirring conditions, and the pH is controlled to be 6.5 to 7.0. Continue aging for 2 to 5 hours to obtain a blue suspension of copper bismuth subcarbonate precipitate.

[0024] 1B: 106g Mg(NO 3 ) 2 .6H 2 O is formulated as a 1 molar aqueous solution. Mix the magnesium nitrate solution and 233.5g of water glass with a modulus of 3.5 at 80°C under stirring, control the pH value to be 8.5 to 9.5, continue to age at this temperature for 2 to 8 hours, and add 1.8g of water glass with a molecular weight of 750 Wan's polyacrylamide is used as a flocculant, and it is aged at this temperature for 2 to 8 hours to obtain a suspension of white precipitate.

[0025] 1C: Mix the suspension 1B and 1A, adjust the pH to 8.5-9.5, and age for 2-6 hours at...

Embodiment 2

[0028] 2A: Weigh 12.0g Bi(NO 3 ) 3 .5H 2 O and 102.8g Cu(NO 3 )2.3H 2 O, dissolved in water into a 2mol / L aqueous solution. Sodium carbonate solution with a concentration of 1 mol / L and copper bismuth nitrate solution with a concentration of 2 mol / L are mixed in parallel at 50°C under stirring conditions, and the pH is controlled to be 6.5 to 7.0. Continue aging for 2-5 hours to obtain a blue suspension of copper bismuth subcarbonate precipitate.

[0029] 2B: 106g Mg(NO 3 )2.6H 2 O was made into a 1mol / L aqueous solution. Mix the magnesium nitrate solution and 236.4g of water glass with a modulus of 3.5 at 80°C under stirring, control the pH value to be 8.5 to 9.2, continue to age at this temperature for 2 to 8 hours, and add 1.6g of water glass with a molecular weight of 750 Wan's polyacrylamide was used as a flocculant to obtain a white suspension.

[0030] 2C: Mix the above suspensions A and B, adjust the pH to 8.5-9.2, and react at 75-80°C for 2-7 hours under stir...

Embodiment 3

[0033] 3A: Weigh 14.0g Bi(NO 3 ) 3 .5H 2 O and 96.7gCu(NO 3 ) 2 .3H 2 O, dissolved to make 1mol / L aqueous solution. Sodium carbonate solution with a concentration of 1mol / L and copper bismuth solution are mixed in parallel at 65°C under stirring conditions, and the pH is controlled at 6.5 to 7.0 to prepare a blue suspension of basic copper bismuth carbonate precipitate.

[0034] 3B: 106gMg(NO 3 )2.6H 2 O was made into a 1mol / L aqueous solution. The magnesium nitrate solution 231.8g modulus is the water glass of 3.5 at 50 ℃ and under agitation and is mixed in parallel, and the control pH value is equal to 8.5~9.3. Then, continue to age at this temperature for 2 to 8 hours, and add 1.6 g of polyacrylamide with a molecular weight of 7.5 million as a flocculant to form a suspension of white precipitate.

[0035] 3C: Mix the suspensions 3A and 3B, adjust the pH to 8.5-9.5, and react at 75-80° C. with stirring for 6-10 hours. Filtration, washing, drying at 120-140°C, and c...

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Abstract

The invention discloses a preparation method of a CuBiMgSi catalyst for synthesizing butynediol and belongs to the technical field of catalyst preparation. The catalyst is a complex of oxides of Cu, Bi, Si and Mg and is prepared by using a step-by-step precipitation method. The catalyst disclosed by the invention is used for an ethynylation reaction of formaldehyde and acetylene to synthesize 1,4-butanediol, is high in catalytic activity and high stability and leads to a formaldehyde conversion ratio of 97.5% or above, a 1,4-butanediol selectivity of 98.9% or above and a 1,4-butanediol yield of 96.5%.

Description

technical field [0001] The invention relates to a CuO-Bi compound for synthesizing 1,4-butynediol from formaldehyde and acetylene 2 A preparation method of O3-MgO-SiO2 catalyst belongs to the technical field of catalyst preparation. Background technique [0002] Butynediol is a raw material for the manufacture of a series of important organic products such as butylene glycol, butylene glycol, n-butanol, dihydrofuran, tetrahydrofuran, γ-butyrolactone, and pyrrolidone. It is used in medicine, textiles, artificial leather, and preservatives. And military and other fields have important and extensive uses. In recent years, with the rapid development of biodegradable plastics such as synthetic polyurethane elastic fibers, polytetramethylene glycol ether, and polybutylene succinate, the demand for 1,4-butynediol has increased by 10% per year. speed growth. Among the many processes for synthesizing 1,4-butanediol, the alkyne aldehyde process using formaldehyde and acetylene as r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/843C07C29/42C07C33/046B01J37/08B01J37/03
CPCB01J23/8437B01J37/031B01J37/088B01J2523/00C07C29/42B01J2523/17B01J2523/22B01J2523/41B01J2523/54C07C33/046
Inventor 周焕文邓少亮乔川曲雪琴
Owner 大连瑞克科技股份有限公司
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