Preparation method of copper-containing catalyst

A copper catalyst and catalyst technology, applied in the preparation of organic compounds, chemical instruments and methods, preparation of hydroxyl compounds, etc., can solve the problems of affecting the physicochemical properties of catalysts, and the dispersion effect of active components is not obvious, and achieve the improvement and increase of active centers. Synergistic effect, improving dispersion effect

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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Cu(NO 3 ) 2 ·3H 2 O, Zn(NO 3 ) 2 ·6H 2 O was dissolved in deionized water, and 96 grams of hydroxyethylene diphosphonic acid was added and mixed evenly to prepare a mixed solution A, Cu 2+ The concentration is 2.8mol / L, Zn 2+ The concentration is 2.5mol / L. Cu(NO 3 ) 2 ·3H 2 O and AlCl 3 ·6H 2 O was dissolved in deionized water to form a mixed solution B, Cu 2+ Concentration is 1.8mol / L, Al 3+ The concentration is 2.0mol / L. Add 262 grams of cetyltrimethylammonium bromide and 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 210 rpm, the aging temperature was 74° C., the pH value was 7.0, and the aging time was 0.6 hours. After aging, the mixed solution B and sodium c...

Embodiment 2

[0038] 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 158 grams of ethylenediamine tetramethylene phosphonic acid and mixed uniformly, and mixed solution A was prepared, and Cu(NO 3 ) 2 ·3H 2 O and Al 2 (SO 4 ) 3 18H 2 O was dissolved in deionized water to form mixed solution B. Add 172 grams of tetrapropylammonium bromide and deionized water in the reaction tank, sodium metaaluminate solution (containing Al 2 o 3 62g / L) and the mixed solution A were added into the reaction tank in parallel, the gelation temperature was 55°C, the pH value of the gelation was 7.8, and the gelation time was 1.4 hours to obtain the slurry I. The slurry I was aged under stirring, the stirring speed was 210 rpm, the aging temperature was 74° C., the aging pH value was 7.1, and the aging was 0.7 hours. After aging, the mixed solution B and sodium carbonat...

Embodiment 3

[0040] 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 O was dissolved in deionized water, and 210 grams of polyacrylic acid (molecular weight: 3000) and 88 grams of hydroxyethylene diphosphonic acid were added and mixed evenly to form a mixed solution A. Cu(NO 3 ) 2 ·3H 2 O and Al(NO 3 ) 3 9H 2O was dissolved in deionized water to form mixed solution B. Add 94 grams of tetraethylammonium hydroxide and deionized water in the reaction tank, sodium metaaluminate solution (containing Al 2 o 3 50g / L) and the mixed solution A were added into the reaction tank in parallel, the gelation temperature was 48°C, the pH value was 7.4, and the gelation time was 1.0 hour to obtain the slurry I. The slurry I was aged under stirring, the stirring speed was 220 rpm, the aging temperature was 75° C., the aging pH value was 6.8, and the aging time was 0.8 hours. After the aging is finished, the...

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Abstract

The invention discloses a preparation method of a copper-containing 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 parallel flow 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, roasting and molding the solid phase to obtain the catalyst, wherein a quaternary ammonium salt compound is added before the gelling reaction in the step (1), wherein the mixed solution A is an aqueous solution containing a soluble copper salt, a soluble zinc salt and an organic auxiliary agent, and the mixed solution B is an aqueous solution containing a soluble copper salt and a soluble aluminum salt. The catalyst has characteristics of uniform active metal copper distribution, good synergistic effect, large active metal active center number, catalyst activity improving, catalyst selectivity improving, catalyst thermal stability improving, and good application prospect.

Description

technical field [0001] The invention relates to a preparation method of a copper-containing catalyst, in particular to a preparation method of a copper-containing 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 presen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/80B01J35/10C07C29/154C07C31/04
CPCB01J23/80B01J35/1004C07C29/154C07C31/04Y02P20/52
Inventor 王海涛徐学军王继锋刘东香
Owner CHINA PETROLEUM & CHEM CORP
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