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Preparation method of copper-zinc catalyst

A catalyst, copper-zinc technology, which is applied in the field of preparation of copper-zinc catalysts, can solve the problems of insignificant dispersion effect of active components, affecting the physicochemical properties of catalysts, etc.

Active Publication Date: 2020-09-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The method mentioned above changes the dispersion of copper on the catalyst after reduction by changing the copper-based catalyst preparation process or adding additives on this basis, and improves the activity of the catalyst. In the process of improving the dispersion of copper components, other physical and chemical properties of the catalyst are affected, and the effect of improving the dispersion of active components is not obvious

Method used

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  • Preparation method of copper-zinc catalyst
  • Preparation method of copper-zinc catalyst
  • Preparation method of copper-zinc catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Cu(NO 3 ) 2 ·3H 2 O, Zn(NO 3 ) 2 ·6H 2 O was dissolved in deionized water, added sodium lignosulfonate and mixed evenly to prepare mixed solution A, Cu 2+ The concentration is 2.8mol / L, Zn 2+ The concentration is 2.5mol / L, and the weight concentration of sodium lignosulfonate is 55g / L. Cu(NO 3 ) 2 ·3H 2 O and AlCl 3 ·6H 2 Dissolve O in deionized water, add dimethyl ammonium chloride and mix evenly to form a mixed solution B, Cu 2+ Concentration is 1.8mol / L, Al 3+ The concentration is 2.0mol / L, and the weight concentration of dimethyl ammonium chloride is 23g / L. Add deionized water in the reaction tank, sodium metaaluminate solution (containing Al 2 o 3 42g / L) and the mixed solution A were added into the reaction tank concurrently, the gelling temperature was 60°C, the gelling pH was 7.5, and the gelling time was 0.9 hours to obtain slurry I. The slurry I was aged under stirring, the stirring speed was 220 rpm, the aging temperature was 75° C., the pH val...

Embodiment 2

[0037] According to the method for embodiment 1, by the component content ratio of catalyst B in table 1, Cu(NO 3 ) 2 ·3H 2 O, Zn(NO 3 ) 2 ·6H 2 O was dissolved in deionized water, added diisooctyl sodium sulfosuccinate and mixed evenly to prepare a mixed solution A (wherein the weight concentration of diisooctyl sodium sulfosuccinate was 70g / L), and Cu(NO 3 ) 2 ·3H 2 O and Al 2 (SO 4 ) 3 18H 2 Dissolve O in deionized water, add chlorinated methylaniline and mix evenly to prepare mixed solution B (the weight concentration of chlorinated methylaniline is 18g / L). Add deionized water in the reaction tank, sodium metaaluminate solution (containing Al 2 o 3 36g / L) and the mixed solution A were added into the reaction tank in parallel, the gelling temperature was 55°C, the gelling pH was 7.6, and the gelling time was 0.8 hours to obtain slurry I. The slurry I was aged under stirring, the stirring speed was 225 rpm, the aging temperature was 76° C., the aging pH value wa...

Embodiment 3

[0039] According to the method for embodiment 1, by the component content ratio of catalyst C in table 1, Cu(NO 3 ) 2 ·3H 2 O, Zn(NO 3 ) 2 ·6H 2 0, add sodium cetylbenzene sulfonate and mix evenly, be mixed with mixed solution A and dissolve in deionized water to make mixed solution A (wherein the weight concentration of sodium cetylbenzene sulfonate is 62g / L), the Cu (NO 3 ) 2 ·3H 2 O and Al(NO 3 ) 3 9H 2Dissolve O in deionized water, add dimethylaniline chloride and mix evenly to form a mixed solution B (the weight concentration of dimethylaniline chloride is 20g / L). Add deionized water in the reaction tank, sodium metaaluminate solution (containing Al 2 o 3 54g / L) and the mixed solution A were added into the reaction tank concurrently, the gelation temperature was 52°C, the pH value was 7.5, and the gelation time was 1.1 hours to obtain the slurry I. The slurry I was aged under stirring, the stirring speed was 170 rpm, the aging temperature was 72° C., the agin...

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Abstract

The invention discloses a preparation method of a copper-zinc catalyst, which comprises the following steps: (1) carrying out parallel flow gelatinization reaction on a mixed solution A and a sodium metaaluminate solution to obtain slurry I, and aging the slurry I; (2) dropwise adding the mixed solution B and a sodium carbonate solution into the aged slurry I obtained in the step (1) in a parallelflow manner, carrying out a gelling reaction to obtain slurry II, and aging the slurry II; and (3) carrying out solid-liquid separation on the material obtained in the step (2), and drying, roastingand molding the solid phase to obtain the catalyst, wherein the mixed solution A is an aqueous solution containing soluble copper salt, soluble zinc salt and a surfactant P1, and the mixed solution Bis an aqueous solution containing soluble copper salt, soluble aluminum salt and a surfactant P2. The catalyst prepared by the method is uniform in active metal distribution, has a good synergistic effect, improves the activity, selectivity and thermal stability of the copper-zinc catalyst, and has a good application prospect.

Description

technical field [0001] The invention relates to a preparation method of a copper-zinc catalyst, in particular to a preparation method of a copper-zinc catalyst with high activity, high selectivity and good heat resistance. Background technique [0002] As a basic chemical raw material and new energy, methanol has been paid more and more attention. It is widely used in organic synthesis, dyes, fuels, medicines, coatings and national defense industries. With the continuous growth of methanol demand and production capacity along with industrial development in recent years, methanol Its position in the national economy is becoming more and more important. Therefore, in order to further promote the development of the methanol industry, its production technology and catalyst performance need to be further improved. [0003] In industry, methanol is generally used to contain H 2 , CO, CO 2 Syngas is produced under certain conditions of pressure, temperature and presence of cataly...

Claims

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Application Information

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IPC IPC(8): B01J23/80B01J35/10C07C29/154C07C31/04
CPCB01J23/80C07C29/154B01J35/394B01J35/61B01J35/63C07C31/04Y02P20/52
Inventor 王海涛徐学军王继锋刘东香
Owner CHINA PETROLEUM & CHEM CORP
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