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A kind of preparation method and application of nickel-promoter-alumina-zirconia catalyst

A catalyst, alumina technology, used in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, hydrogenation preparations, etc. Surface area, high dispersion effect

Active Publication Date: 2019-09-10
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These catalysts all use alumina as a carrier, and the strong L acid sites on the surface of alumina have a strong adsorption effect on C=O in the reaction material, and then make the reaction species condense and dehydrogenate each other to form carbon deposits, which will lead to a significant increase in catalyst activity. decline

Method used

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  • A kind of preparation method and application of nickel-promoter-alumina-zirconia catalyst
  • A kind of preparation method and application of nickel-promoter-alumina-zirconia catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0028] (1) Weigh 190 g of sodium metaaluminate and add deionized water to prepare 500 mL of an aqueous solution; weigh 4.5 g of polyethylene glycol and 90 g of aluminum chloride, and add deionized water to prepare a 500 mL solution. The above two solutions were co-currently mixed at 50°C to form a gel, and hydrochloric acid was added to adjust the pH of the system to 6. (2) Take 40g of zirconyl nitrate, add deionized water to prepare 500mL aqueous solution, add to the material of step (1) at 50°C under stirring, add sodium carbonate to adjust the pH value to 7, and leave it to stand for 3h. Filter, wash 3 times with water, replace 3 times with ethanol, and dry at 100°C for 12 hours to obtain dry rubber powder containing zirconium. (3) Take 100 g of dry rubber powder, weigh 90 g of nickel nitrate and 3 g of copper nitrate hexahydrate, and mix them evenly with the dry rubber powder. (4) Weigh 0.7 g of formic acid, dilute with 17 g of deionized water to obtain a dilute acid solut...

Embodiment 2

[0031] (1) Weigh 200 g of potassium metaaluminate and add deionized water to prepare a 500 mL solution; weigh 11 g of sucrose and 110 g of aluminum sulfate and add deionized water to prepare a 500 mL solution. The above two solutions were co-currently mixed to form a gel at 75°C, and sulfuric acid was added to adjust the pH of the system to 7. (2) Take 50g of zirconium oxychloride, add deionized water to make 500mL of aqueous solution, add to the material of step (1) at 75°C under stirring conditions, add ammonium carbonate to adjust the pH to 9, and leave it to stand for 5h , Filter, wash 5 times with water, replace 5 times with ethanol, and dry at 150°C for 3 hours to obtain dry rubber powder containing zirconium. (3) Take 100 g of dry rubber powder, weigh 100 g of nickel nitrate and 5 g of copper nitrate, and mix them evenly with the dry rubber powder. (4) Weigh 1.5 g of glacial acetic acid, dilute with 20 g of deionized water to obtain a dilute acid solution, add the dilut...

Embodiment 3

[0034] (1) Weigh 190 g of sodium metaaluminate and add deionized water to prepare a 500 mL solution; weigh 8 g of polyvinylpyrrolidone and 100 g of aluminum nitrate, add deionized water to prepare a 500 mL solution. The above two solutions were co-currently mixed at 60°C to form a gel, and nitric acid was added to adjust the system pH to 7.5. (2) Take 50g of zirconyl nitrate, add deionized water to prepare 500mL aqueous solution, add to the material of step (1) at 60℃, stirring, add sodium hydroxide to adjust the pH value to 8, and leave it to stand for 4h , Filter, wash 3 times with water, replace 4 times with ethanol, and dry at 120°C for 8 hours to obtain dry rubber powder containing zirconium. (3) Take 100g of dry rubber powder, weigh 150g of nickel nitrate and 8g of cerium nitrate, and mix them evenly with the dry rubber powder. (4) Weigh 2.5 g of citric acid, dilute with 22 g of deionized water to obtain a dilute acid solution, add the dilute acid solution to the materia...

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Abstract

A nickel-agent-alumina-zirconia catalyst is composed of: alumina:zirconia:nickel:agent mass ratio is 100:10.5~18.8:12~21.3:0.5~1.8, the pore volume of the catalyst is 0.4mL / g~0.6mL / g, specific surface area 120m 2 / g~180m 2 / g, pores with pore diameters between 30nm and 45nm account for 25% to 35% of the total pore volume fraction, and pores with pore diameters between 7nm and 12.5nm account for 20% to 25% of the total pore volume fraction. The invention has the advantages of good stability and long life.

Description

Technical field [0001] The invention relates to a preparation method and application of a nickel-adjuvant-alumina-zirconia catalyst. Background technique [0002] Synthesize 1,4-butynediol using formaldehyde and acetylene as raw materials, and finally obtain 1,4-butynediol products through hydrogenation. The chemical reactions involved in this process are not only the process of 1,4-butanediol being saturated with C≡C in 1,4-butynediol, but also the unsaturated by-products, such as 1,4-butanediol. A chemical reaction in which ene glycol, 4-hydroxybutyraldehyde and other aldehyde species are further hydrogenated. Usually a fixed bed reactor is used, with supported nickel as the hydrogenation catalyst. [0003] US patents US 3950441 and US 3759845 disclose silicon-containing γ-Al 2 O 3 Support Ni-Cu-Mn catalyst. Chinese patent CN 1081174A reports Al prepared by co-precipitation method 2 O 3 The supported nickel catalyst as the carrier is used for the fixed bed high pressure hydrog...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/755B01J23/83C07C29/17C07C31/20
CPCC07C29/172B01J23/755B01J23/83B01J35/635B01J35/633B01J35/647B01J35/615C07C31/207
Inventor 赵永祥李海涛张鸿喜张因
Owner SHANXI UNIV
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