Catalyst for producing low-carbon mixed alcohol by using synthesis gas as well as preparation method and application of catalyst

A low-carbon mixed alcohol and catalyst technology, applied in the field of catalysis, can solve the problem of low selectivity of isobutanol and achieve the effects of low raw material cost, low reaction pressure and strong adaptability

Inactive Publication Date: 2015-02-25
NANJING TECH UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention solves the deficiencies in the prior art, and the present invention provides a higher C 2 + Alcohol and isobutanol selectivity, can effectively solve the C 2 + The problem of low selectivity of alcohols, especially isobutanol

Method used

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  • Catalyst for producing low-carbon mixed alcohol by using synthesis gas as well as preparation method and application of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032]Weigh 7.95gCu(NO 3 ) 2 ·3H 2 O, 8.84gZn(NO 3 ) 2 ·6H 2 O, 3.56gZr(NO 3 ) 4 ·5H 2 O, 1.56gFe(NO 3 ) 3 9H 2 O, while adding 0.82gMn(NO 3 ) 2 Prepare 80ml solution, add the solution dropwise to ammonia water at 60°C, control the pH of the titration end point to 8.0, continue to stir for 20 minutes after the titration is completed, then age at 70°C for 30 minutes, then wash and filter repeatedly with deionized water 5 times, after drying at 120°C for 12 hours, the catalyst was ground into powder and impregnated in 6% CsNO 3 In the solution for 12 hours, after impregnation, dry again at 120°C for 12 hours, and finally bake at 300°C for 6 hours, press into tablets, and crush the catalyst to 20-40 mesh. The catalyst is marked as C-1.

Embodiment 2

[0034] Weigh 5.48gCu(NO 3 ) 2 ·3H 2 O, 9.23gZn(NO 3 ) 2 ·6H 2 O, 1.95gZr(NO 3 ) 4 ·5H 2 O, while adding 1.59gCe(NO 3 ) 3 ·6H 2 O to make a 70ml solution, add the solution dropwise to the sodium carbonate solution at 50°C, control the pH of the titration end point to 7.5, continue stirring for 20min after the titration is completed, then age at 60°C for 30min, and then use deionized water Repeatedly washing and filtering 5 times, drying at 120°C for 12 hours, grinding the catalyst into powder and impregnating it in 8% K 2 CO 3 In the solution for 12 hours, after impregnation, dry again at 120°C for 12 hours, and finally bake at 350°C for 6 hours, press into tablets, and crush the catalyst to 20-40 mesh. The catalyst is marked as C-2.

Embodiment 3

[0036] Weigh 6.85gCu(NO 3 ) 2 ·3H 2 O, 5.72gZn(NO 3 ) 2 ·6H 2 O, 5.64gZr(NO 3 ) 4 ·5H 2 O, 0.23gMn(NO 3 ) 2 , while adding 0.53gCe(NO 3 ) 3 ·6H 2 O was made into a 75ml solution, and the solution was added dropwise to the sodium carbonate solution at 85°C, and the pH at the end point of the titration was controlled to be 7.0. After the titration was completed, continue to stir for 20 minutes, then aged at 90°C for 30 minutes, and then deionized water Repeated washing and filtering 5 times, drying at 120°C for 12 hours, grinding the catalyst into powder and impregnating it in 8% RbNO 3 In the solution for 12 hours, after impregnation, dry again at 120°C for 12 hours, and finally bake at 450°C for 6 hours, press into tablets, and crush the catalyst to 20-40 mesh. The catalyst is marked as C-3.

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Abstract

The invention provides a catalyst for producing low-carbon mixed alcohol by using synthesis gas. The catalyst comprises copper oxide, zinc oxide, zirconium oxide and auxiliaries, and the general formula of the catalyst is CuaZnbZrcMdNeOx, wherein M refers to at least one of metal elements such as Mn, Ce, Mg, Fe, Co and Ni; N refers to an alkali metal; a is equal to 0.3-4.0; b is equal to 0.5-3.5; c is equal to 1.0-5.0; d is equal to 0.02-0.3; e is equal to 0.01-0.2; and x refers to the sum of number of oxygen atoms needed by all the metal elements in the general formula. The invention also discloses a preparation method and application of the catalyst. The catalyst has high C2<+> alcohol selectivity, high selectivity of isobutyl alcohol and low hydrocarbon selectivity, the water content in the liquid phase product is low, the preparation method is simple and feasible, and industrialization is easily realized.

Description

technical field [0001] The invention relates to a catalyst and its preparation method and application, in particular to a catalyst for producing low-carbon mixed alcohols from synthesis gas, its preparation method and application, and belongs to the technical field of catalysis. Background technique [0002] As an important strategic material for national economic and social development, energy is an important condition for ensuring national sustainable development and national defense security. In recent years, with the continuous expansion of human demand for energy and the continuous consumption of natural resources, it is very urgent for human beings to actively seek and develop new energy systems. In the world's energy structure, oil accounts for only about 7%, while coal is close to 80%. However, my country's energy structure with rich coal and little oil is more obvious. Therefore, considering the strategy of energy development, research and development of efficient a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J23/83B01J23/80C07C29/156C07C29/154
Inventor 刘定华周鹏飞殷玉圣孙中华秦丽珍孙林兵刘晓勤张觅王新
Owner NANJING TECH UNIV
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