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Protective agent for copper-based methanol synthesis catalyst and preparation method thereof

A methanol synthesis and protective agent technology, which is applied in the direction of catalyst protection, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of unfriendly environment and unsatisfactory removal effect, and achieve good quality of crude alcohol and high quality Excellent, the effect of reducing the content of impurities

Active Publication Date: 2021-01-01
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the protective agent developed by the company is mainly composed of Cu-Zn-Cr, and the Cr component is not friendly to the environment. In addition, the protective agent mainly catalyzes the decomposition of Fe(CO) at the synthesis temperature of methanol 5 , for the poison Ni(CO) 4 The removal effect is not ideal

Method used

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  • Protective agent for copper-based methanol synthesis catalyst and preparation method thereof
  • Protective agent for copper-based methanol synthesis catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] According to the principle of taking the total atomic number of Cu, Zn and Al as unit 1, and the principle of 55% Cu atomic content, 30% Zn atomic content and 15% Al atomic content in the finished product, prepare the required raw material liquid;

[0019] Na at a concentration of 1 mol / L at 45°C 2 CO 3 The solution is added to the aluminum acetate aqueous solution to pH = 10, and then the auxiliary agent Zr (NO 3 ) 4 Aqueous solution, control the molar ratio of Zr and Al in the solution to not more than 0.05, end point pH=7.0, aging for 20min, and obtain the carrier slurry A of the protective agent of the present invention;

[0020] Na with a concentration of 1mol / L 2 CO 3 The solution was added to a 250 g / L aqueous solution containing Co / Mo nitrate, the precipitate was washed with deionized water until the pH of the supernatant was 7.5, and the modified particle water slurry B was obtained;

[0021] Under vigorous stirring at 65°C, the Cu(NO 3 ) 2 and Zn(NO 3 ...

Embodiment 2

[0024] According to the principle of taking the total atomic number of Cu, Zn and Al as unit 1, and the principle of 50% Cu atomic content, 25% Zn atomic content and 25% Al atomic content in the finished product, prepare the required raw material liquid;

[0025] At room temperature, the concentration will be 1mol / LNa 2 CO 3 The solution was added to the aluminum nitrate aqueous solution to pH = 9.0, and then the additive Zr(NO 3 ) 4 An aqueous solution, the molar ratio of Zr and Al in the solution is controlled to be not less than 0.02, the end point pH is 7.0, and aging is carried out for 60 minutes to obtain the carrier slurry A of the protective agent of the present invention;

[0026] K with a concentration of 1mol / L 2 CO 3 The solution was added to a 50 g / L aqueous solution containing Co nitrate, the precipitate was washed with deionized water until the supernatant had a pH of 6.5, and the modified particle water slurry B was obtained;

[0027] Under vigorous stirri...

Embodiment 3

[0030] According to the principle of taking the total atomic number of Cu, Zn and Al as unit 1, and the principle of 45% Cu atomic content, 30% Zn atomic content and 25% Al atomic content in the finished product, prepare the required raw material liquid;

[0031] At room temperature the concentration will be 1mol / LK 2 CO 3 The solution was added to the aluminum nitrate aqueous solution to pH = 8.0, and then the additive Zr(NO 3 ) 4 An aqueous solution, the molar ratio of Zr and Al in the solution is controlled to be not less than 0.02, the end point pH is 6.5, and the carrier slurry A of the protective agent of the present invention is obtained by aging for 120 minutes;

[0032] Na with a concentration of 1mol / L2 CO 3 The solution was added to a 125 g / L Mo nitrate-containing aqueous solution, and the precipitate was washed with deionized water until the supernatant had a pH of 7.0 to obtain modified particle slurry B;

[0033] Under vigorous stirring at 75°C, the Cu(NO 3 ...

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Abstract

The invention relates to a copper-based methanol synthesis catalyst protectant and a preparation method thereof. The protectant includes the main metals Cu, Zn, Al and the modification assistants Zr,Co, Mo, wherein the main metals consists of 45%-55% of Cu, 25%-30% of Zn, and 15%-25% of Al. The preparation method of the protectant mainly includes: preparing an Al carrier slurry containing the assistant Zr and a Cu / Zn main slurry containing modification particles by coprecipitation, mixing the carrier slurry with the main slurry and performing pulping, then carrying out washing, filtration, drying, roasting, molding and other processes so as to obtain the protectant. The protectant can decompose Fe(CO)5 and Ni(CO)4 in feed gas and adsorb catalyst poisons at the same time, and can effectively purify the feed gas and protect the catalyst. The protector is used for purifying feed gas and protecting catalyst, and is especially suitable for purification of coal-based large-scale methanol synthesis feed gas.

Description

technical field [0001] The invention relates to a catalyst protecting agent and a preparation method thereof, in particular to a copper-based methanol synthesis catalyst protecting agent and a preparation method thereof. Background technique [0002] The basic national conditions of my country's resources are "short of oil, less gas, and rich in coal". Coal is the most important basic raw material resource in my country's industrial production, and the effective use of coal has become a major focus of research in the energy field. Synthesis gas is obtained from partial oxidation of coal or steam reforming, and methanol, an important chemical product, can be produced through steps such as purification, catalytic synthesis, and rectification. However, the feed gas for methanol synthesis obtained from coal still contains a relatively high amount of Fe(CO) 5 、Ni(CO) 4 And organic sulfur and other poisons, these substances can interact with the methanol synthesis catalyst, lead...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J33/00
CPCB01J33/00
Inventor 王琼肖康
Owner NANJING UNIV OF POSTS & TELECOMM