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Protective agent for removing carbonyl iron and carbonyl nickel from synthetic gas and preparation method thereof

A technology for forming gas-decarbonylated iron and protective agents, applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve the problems of complex wet process equipment, difficult handling of absorbents, incomplete adsorption, etc.

Pending Publication Date: 2022-02-22
SINOPEC NANJING RES INST OF CHEM IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In theory, there are many methods for decarbonylating iron and nickel, which can be mainly divided into two categories: wet method and dry method. The wet method includes direct absorption method, oxidation absorption method, etc. The wet method has complicated equipment, difficult operation, and produces sewage. Absorbents are also more difficult to handle
The dry method mainly includes physical methods and catalytic removal methods. The common physical method is the adsorption of diatomaceous earth pellets. Due to physical adsorption, the adsorption force is weak, the adsorption is not complete, and the adsorption can only be replaced after the adsorption is saturated.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040]Add potassium bicarbonate solution with a concentration of 0.3mol / L to 0.2mol / L Cu and Zn mixed nitrate aqueous solution to carry out co-precipitation reaction, the co-precipitation temperature is 50°C, the parent precipitate is washed with deionized water, filtered The final pH value of the clear liquid is 7.0, and the parent precipitate slurry is obtained;

[0041] Mix and co-precipitate the soluble salts of metal Zn with aluminum nitrate in a molar ratio of 1:2. According to the different ionization constants of the metal precipitates, adjust the final pH value to 7.2, control the temperature of the mixed solution at 20°C, and then age , washing, and obtaining carrier slurry.

[0042] Then mix and beat the above-mentioned matrix slurry and carrier slurry, let it stand for 30 minutes, filter, dry and granulate to obtain a certain particle size powder, and make decarbonylated iron-nickel protective agent BHJ-101 after molding.

Embodiment 2

[0044] Add the sodium bicarbonate solution with a concentration of 0.5mol / L to the 1mol / L Cu and Zn mixed nitrate aqueous solution to carry out coprecipitation reaction. The coprecipitation temperature is 60°C. The parent precipitate is washed with deionized water and filtered The pH value at the end point of the liquid is 7.1, and the parent precipitate slurry is obtained;

[0045] Mix and co-precipitate the soluble salts of metal Mg with aluminum nitrate in a molar ratio of 1:3. According to the different ionization constants of the metal precipitates, adjust the final pH value to 7.1, control the temperature of the mixed solution at 50°C, and then age , washing, and obtaining carrier slurry.

[0046] Then mix and beat the above-mentioned matrix slurry and carrier slurry, let it stand for 30 minutes, filter, dry and granulate to obtain a certain particle size powder, and make the decarbonylated iron-nickel protective agent BHJ-102 through the molding process.

Embodiment 3

[0048] Add the sodium carbonate solution with a concentration of 0.8mol / L to the 0.2mol / L Cu and Zn mixed nitrate aqueous solution to carry out coprecipitation reaction. The coprecipitation temperature is 50°C. The parent precipitate is washed with deionized water and filtered The pH value at the end point of the liquid is 7.2, and the parent precipitate slurry is obtained;

[0049] Mix and co-precipitate the soluble salts of metal Ca with aluminum nitrate in a molar ratio of 1:4. According to the different ionization constants of the metal precipitates, adjust the final pH value to 7.3, control the temperature of the mixed solution at 30°C, and then age , washing, and obtaining carrier slurry.

[0050] Then mix and beat the above-mentioned matrix slurry and carrier slurry, let it stand for 30 minutes, filter, dry and granulate to obtain a certain particle size powder, and obtain decarbonylated iron-nickel protective agent BHJ-103 after molding.

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Abstract

The invention belongs to the technical field of preparation of catalytic materials, and particularly relates to a protective agent for removing carbonyl iron and carbonyl nickel from synthetic gas and a preparation method thereof. The preparation method comprises the following steps: taking sodium carbonate (sodium bicarbonate), potassium carbonate (potassium bicarbonate) or ammonia water in an alkaline salt containing solution as a precipitator, mixing with a copper-zinc containing solution, carrying out co-precipitation to prepare parent slurry I, and controlling the final pH value to be 7.0 to 7.5; mixing aluminum nitrate with soluble salts such as Zn, Mg, Ca, Mn and the like, and performing co-precipitation with a precipitant to prepare slurry II; and mixing and pulping the slurry II and the slurry I, or directly washing the slurry II with deionized water, carrying out suction filtration, drying, roasting and forming to obtain a carbonyl-removing iron-nickel protective agent finished product. The carbonyl-removing iron-nickel protective agent prepared by the method is divided into two types, namely a copper-zinc catalytic decomposition type and a non-copper-zinc low-temperature adsorption type which can be used for removing carbonyl iron-nickel in synthesis gas, the two types of active reaction temperatures are different, and the total iron-nickel capacities are different.

Description

technical field [0001] The invention belongs to the technical field of preparation of catalytic materials, and in particular relates to a protective agent for decarbonyl iron and carbonyl nickel in synthesis gas and a preparation method thereof. Background technique [0002] Methanol is an important basic chemical product, and its domestic production capacity has exceeded 87 million tons in 2019. In recent decades, in order to reduce the production cost of unit methanol more effectively in the industry, Lurgi Company took the lead in proposing large methanol (Mega- [0003] Methanol), the large-scale methanol synthesis unit has become the development direction of the methanol industry. With the development trend of large-scale methanol, the original subtle problems are gradually enlarged. [0004] We know that common methanol catalysts are copper-based catalysts. This type of catalyst is extremely sensitive to poisons. The traditionally known and known poisons mainly inclu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J33/00B01J23/80B01J23/889B01J37/03C07C29/94C07C29/154C07C31/04
CPCB01J33/00B01J23/80B01J23/8892B01J37/03C07C29/94C07C29/154C07C31/04Y02P20/52
Inventor 檀结东陈海波于杨仇冬毛春鹏
Owner SINOPEC NANJING RES INST OF CHEM IND CO LTD