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CoM1M2-based hydrotalcite-like precursor mother liquor, catalyst preparation method, and applications of catalyst

A technology of hydrotalcite and precursor, which is applied in the field of industrial synthesis of mixed alcohol preparation, can solve the problems of difficult control of catalyst process, unsatisfactory catalyst selectivity, yield and stability, etc., and achieves low deactivation and low carbon selectivity. The effect of high and high alcohol selectivity

Inactive Publication Date: 2015-08-05
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing process of preparing catalysts using hydrotalcite-like materials as precursors is difficult to control, and the selectivity, yield and stability of the prepared catalysts are not ideal enough, and they are not well suitable for industrial applications.

Method used

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  • CoM1M2-based hydrotalcite-like precursor mother liquor, catalyst preparation method, and applications of catalyst
  • CoM1M2-based hydrotalcite-like precursor mother liquor, catalyst preparation method, and applications of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] In this example, see figure 1 , figure 2 (a) and Table 1, a method using CoM 1 m 2 Preparation of CoM from base hydrotalcite precursor mother liquor 1 m 2 The method of base catalyst, comprises the steps:

[0027] a. According to n(Co):n(Mn):n(Al)=1:1:1 (molar ratio), prepare nitrate with a total metal ion concentration of 1.0mol / L [Co(NO 3 ) 2 ·6H 2 O, Mn(NO 3 ) 2 , Al(NO 3 ) 3 9H 2 O] solution, press n(NaOH):n(Na 2 CO 3 ) = 1 (molar ratio) to prepare NaOH and Na 2 CO 3 The total concentration of the mixed lye is 1.0mol / L. Under the condition of room temperature and sufficient stirring, the co-current co-precipitation reaction is carried out, and the pH value of the precipitation mother liquor is kept in the range of 9 ± 0.2;

[0028] b. After the precipitation is over, continue to stir in a constant temperature oil bath at 60°C for 12 hours, then cool to room temperature and filter with suction, wash the filter cake with deionized water until the filt...

Embodiment 2

[0035] This embodiment is basically the same as Embodiment 1, especially in that:

[0036] In this example, see figure 1 , figure 2 (b) and Table 1, a method using CoM 1 m 2 Preparation of CoM from base hydrotalcite precursor mother liquor 1 m 2 The method of base catalyst, comprises the steps:

[0037] a. According to n(Co):n(Mn):n(Mg):n(Al)=1:1:1:1 (molar ratio), prepare nitrate with a total metal ion concentration of 1.0mol / L [Co( NO 3 ) 2 ·6H 2 O, Mn(NO 3 ) 2 , Mg(NO 3 ) 2 ·6H 2 O, Al(NO 3 ) 3 9H 2 O] solution, press n(NaOH):n(NaOH 2 CO 3 ) = 2 (molar ratio) to prepare NaOH and Na 2 CO 3 The total concentration of the mixed lye is 2mol / L, at room temperature and under the condition of sufficient stirring, carry out co-current co-precipitation reaction, and the pH value of the precipitation mother liquor is kept in the range of 9 ± 0.2;

[0038] b. This step is identical with embodiment one;

[0039] c. This step is identical with embodiment one;

[...

Embodiment 3

[0044] This embodiment is basically the same as the previous embodiment, and the special features are:

[0045] In this example, see figure 1 , figure 2 (c) and Table 1, a method using CoM 1 m 2 Preparation of CoM from base hydrotalcite precursor mother liquor 1 m 2 The method of base catalyst, comprises the steps:

[0046] a. According to n (Co): n (Mn): n (Zr): n (Al) = 1:1:1:1 (molar ratio) to prepare nitrate with a total metal ion concentration of 1.0mol / L [Co( NO 3 ) 2 ·6H 2 O, Mn(NO 3 ) 2 , Zr(NO 3 ) 4 ·5H 2 O, Al(NO 3 ) 3 9H 2 O] solution, press n(NaOH):n(NaOH 2 CO 3 ) = 2 (molar ratio) to prepare NaOH and Na 2 CO 3 The total concentration of the mixed lye is 2mol / L, at room temperature and under the condition of sufficient stirring, carry out co-current co-precipitation reaction, and the pH value of the precipitation mother liquor is kept in the range of 9 ± 0.2;

[0047] b. This step is identical with embodiment one;

[0048] c. This step is ide...

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Abstract

The present invention discloses a CoM1M2-based hydrotalcite-like precursor mother liquor, a catalyst preparation method, and applications of the catalyst. According to the present invention, a catalyst precursor having a hydrotalcite-like layered structure is calcined to obtain the catalyst, a metal ion solution containing CoM1M2 and an alkali solution are subjected to a co-precipitation reaction to obtain the catalyst precursor, and the catalyst precursor is sequentially subjected to calcination and reduction treatment to obtain the highly dispersed CoM1M2 based catalyst; and the catalyst has characteristics of small particle size, large specific surface area, highly dispersed component, and strong interaction among every component, and provides high reaction activity and high alcohol selectivity for mixed alcohol preparation through catalytic conversion of synthesis gas.

Description

technical field [0001] The invention relates to a catalyst precursor, a catalyst preparation method and application, which are applied in the technical field of industrial synthesis of mixed alcohol preparation. Background technique [0002] China is a big country in energy production and consumption, and its basic energy consumption accounts for 1 / 10 of the world's total consumption, second only to the United States, ranking second in the world. According to the results of the second national economic census released by the National Bureau of Statistics on December 25, 2009, China’s total primary energy production in 2008 was 2.65 billion tons of standard coal, of which coal, oil, and natural gas accounted for 68% of each. %, 18% and 4%, coal still occupies an absolute dominant position in China's energy supply. It can be seen that the development of coal chemical industry is a key point to solve my country's energy problems and utilize coal resources scientifically and ef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J23/755B01J35/10C07C29/156C07C31/04C07C31/08C07C31/02
CPCY02P20/52
Inventor 王慧张丽君孙予罕钟良枢于飞孙俭高鹏
Owner SHANGHAI UNIV
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