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Nickel-silver series hydrogenation catalysts and preparation method thereof

A hydrogenation catalyst and catalyst technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, selective hydrogenation refining, etc., can solve the problem of poor hydrogenation load and hydrogenation stability, uneven mixing of crystal particles, Catalyst strength deterioration and other problems, to achieve the effect of easy performance, simple process, and performance modulation

Active Publication Date: 2018-11-23
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] CN1218822A has reported a kind of Ni / Al 2 o 3 A selective hydrogenation catalyst suitable for pyrolysis gasoline fractions. The catalyst is prepared by loading nickel on an alumina carrier containing lithium or alkaline earth metals. This catalyst is not good in hydrogenation load and hydrogenation stability.
However, the active metal compound and aluminum hydroxide dry rubber powder or alumina powder are directly mixed and formed by kneading method. This method has problems such as uneven mixing of crystal particles and deterioration of catalyst strength. It is not easy to combine with each other to form a specific skeleton structure

Method used

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  • Nickel-silver series hydrogenation catalysts and preparation method thereof
  • Nickel-silver series hydrogenation catalysts and preparation method thereof
  • Nickel-silver series hydrogenation catalysts and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] (1) Nickel-containing pseudoboehmite

[0058] Concentrate 3L to 65g Al 2 o 3 Aluminum nitrate solution per L and 1L nickel nitrate solution with a concentration of 11.8g NiO / L were mixed evenly and loaded into the container at the high position, and an ammonia solution with a concentration of 8wt% was prepared and loaded into the container at the high position, and the two containers were continuously wriggled The pump controls the flow rate and flows into a stainless steel container with a stirrer equipped with 3L bottom water and gas can be introduced into the bottom of the tank. The reaction temperature is 50°C, and the flow rate is controlled to adjust the pH value of the reaction system to 7.5. After the reaction is completed, add ammonia water to adjust the slurry. The pH value is 8.5, aging for 60 minutes, filtering and separating the mother liquor, and washing. Dry at 90°C for 3 hours and at 120°C for 2 hours to obtain nickel-containing pseudo-boehmite.

[00...

Embodiment 2

[0064] (1) Nickel-containing pseudoboehmite

[0065] Concentrate 4L to 50g Al 2 o 3 Aluminum nitrate solution per L and 0.5L concentration of nickel nitrate solution that is 14.5g NiO / L are mixed evenly and loaded into the container at the high position, and the ammonia solution with a concentration of 8wt% is prepared and packed into the container at the high position, and the two containers are connected under The peristaltic pump controls the flow rate and flows into a stainless steel container with 2L bottom water with agitator and gas at the bottom of the tank. The reaction temperature is 55°C, and the flow rate is controlled to adjust the pH value of the reaction system to 7.7. After the reaction, add ammonia water to adjust The pH value of the slurry is 8.6, aged for 30 minutes, filtered to separate the mother liquor, and washed. Dry at 120°C for 5 hours to obtain nickel-containing pseudo-boehmite.

[0066] (2) Nickel-containing carrier

[0067] Weigh the prepared n...

Embodiment 3

[0078] (1) Nickel-containing pseudoboehmite

[0079] Dilute 1L concentration to 50g Al 2 o 3 / L of aluminum sulfate solution and 0.5L of nickel nitrate solution with a concentration of 6g NiO / L are mixed evenly and placed in a container at a high position, and the prepared concentration is 50g Al 2 o 3 / / 3 L of sodium metaaluminate solution is put into a container at a high position, and the two containers are connected with a peristaltic pump to control the flow rate and flow into a stainless steel container with a stirrer equipped with 2L of bottom water and the bottom of the tank can be fed into the gas, the reaction temperature 60°C, control the flow rate to adjust the pH value of the reaction system to 9, adjust the pH value of the slurry to 9.6 by adding ammonia water dropwise, age for 30 minutes after the reaction, filter and separate the mother liquor, and wash. Dry at 90°C for 3 hours and at 120°C for 2 hours to obtain nickel-containing pseudo-boehmite.

[0080] (...

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Abstract

The invention relates to a nickel-silver series catalysts and a preparation method thereof, in particular related to a preparation method of nickel-silver series hydrogenation catalysts using nickel-containing alumina as a carrier. The nickel-silver hydrogenation catalyst contains active components of nickel and copper, the nickel-containing alumina is used as the carrier, a precursor of the nickel-containing alumina carrier is nickel-containing pseudo-boehmite, and the preparation process of the nickel-containing pseudo-boehmite includes acid-base neutralization and gelling processes; a specific carrier is used in the catalysts provided by the invention, and the specific carrier has the advantages that nickel and the pseudo-boehmite can be organically combined, so that the active component nickel is effectively dispersed in the pspseudo-boehmite, and the nickel-containing alumina carrier swith a specific crystal form is formed; the method has a good regulation effect on a pore structure and acidity of the carrier, and has the advantages of simple process and easy to adjust the performance of the carrier material compared with the preparation of the catalyst by an impregnation method; The nickel-silver series hydrogenation catalysts provided by the invention have high hydrogenation activity and selectivity, with good chemical stability and thermal stability.

Description

technical field [0001] The invention relates to a nickel-silver catalyst and a preparation method thereof, in particular to a preparation method of a nickel-silver hydrogenation catalyst with nickel-containing alumina as a carrier. Background technique [0002] In 2017, China's ethylene production capacity will continue to show an upward trend. As an important by-product of ethylene cracking, pyrolysis gasoline accounts for about 50% to 80% of the ethylene production capacity. How to make good use of this part of by-products will have a major impact on improving the economic benefits of enterprises. At the same time, pyrolysis gasoline also contains a large amount of unsaturated hydrocarbons such as diolefins, alkenyl aromatics, indene, and impurities such as sulfur, nitrogen, and oxygen, which lead to unstable gasoline properties. In industry, two-stage hydrogenation is generally used for refining. First, a low-temperature liquid-phase hydrogenation saturated chain conjug...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J35/10B01J37/02B01J37/08B01J37/18C10G45/06C10G45/36
CPCC10G45/06C10G45/36B01J23/002B01J23/892B01J23/894B01J23/8946B01J37/0201B01J37/0207B01J37/088B01J37/18B01J2523/00C10G2300/202C10G2300/104C10G2300/1044B01J35/31B01J35/613B01J35/615B01J35/635B01J35/633B01J2523/11B01J2523/18B01J2523/22B01J2523/31B01J2523/847B01J2523/3712B01J2523/3706
Inventor 胡晓丽孙利民钱颖马好文郑云弟展学成梁顺琴王斌梁玉龙谢培思
Owner PETROCHINA CO LTD
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