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Method for controlling high dispersion of active centers of supported metal catalyst

A technology of metal catalysts and active centers, applied in the field of highly dispersed control of supported catalyst metal centers, can solve the problem of high hydrogenolysis activity, achieve high isomerization selectivity, easy industrial application, and reduce selectivity

Active Publication Date: 2014-11-26
BEIJING UNIV OF CHEM TECH
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  • Description
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Problems solved by technology

In order to pursue a longer operating time, in 1968 people developed the Pt-Re / Al 2 o 3 catalyst, and successfully reduced the operating pressure and the carbon deposition rate of the catalyst, but due to the high hydrogenolysis activity of Re, the catalyst needs to be presulfurized before use

Method used

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  • Method for controlling high dispersion of active centers of supported metal catalyst
  • Method for controlling high dispersion of active centers of supported metal catalyst

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Embodiment 1

[0023]Zinc sulfate and hexamethylenetetramine were dissolved in deionized water to form solution A. Dip aluminum oxide into solution A, transfer it to a high-pressure reactor, and crystallize at 130°C for 6 hours. Wherein the molar ratio of zinc sulfate, hexamethylene tetramine and aluminum oxide is 15:80:80. After the reaction, the reaction solution was suction-filtered, washed until the eluent was neutral, and the obtained hydrotalcite-modified aluminum oxide was dried at 80° C. for 12 hours. Wherein the trivalent metal in the hydrotalcite laminate is derived from the aluminum dissolved in the reaction process of aluminum oxide.

[0024] Step B: dissolving platinum acetylacetonate and gallium acetylacetonate in a certain amount of deionized water or other solvents to form solution B, immersing the aluminum oxide modified by hydrotalcite obtained in step (1) in solution B, and standing 12h, followed by drying at 80°C for 12h. The molar ratio of platinum acetylacetonate, ga...

Embodiment 2

[0029] Nickel nitrate and ammonia water were dissolved in deionized water to form solution A. Dip aluminum oxide into solution A, transfer it to a high-pressure reactor, and crystallize at 160°C for 2 hours. Wherein the molar ratio of nickel nitrate, hexamethylene tetramine and aluminum oxide is 5:50:150. After the reaction, the reaction solution was suction-filtered, washed until the eluent was neutral, and the obtained hydrotalcite-modified aluminum oxide was dried at 80° C. for 12 hours. Wherein the trivalent metal in the hydrotalcite laminate is derived from the aluminum dissolved in the reaction process of aluminum oxide.

[0030] Step B: Sodium chloroplatinate and indium nitrate are dissolved in a certain amount of deionized water or other solvents to form a solution B, and the hydrotalcite-modified aluminum oxide obtained in step (1) is immersed in the solution B, and allowed to stand 12h, followed by drying at 80°C for 12h. The molar ratio of sodium chloroplatinate,...

Embodiment 3

[0035] Step A: Combine Magnesium Nitrate with Urea

[0036] Magnesium nitrate and urea were dissolved in deionized water to form solution A. Dip aluminum oxide into solution A, transfer it to a high-pressure reactor, and crystallize at 80°C for 12 hours. Wherein the molar ratio of magnesium nitrate, urea and aluminum oxide is 15:100:50. After the reaction, the reaction solution was suction-filtered, washed until the eluent was neutral, and the obtained hydrotalcite-modified aluminum oxide was dried at 80° C. for 12 hours. Wherein the trivalent metal in the hydrotalcite laminate is derived from the aluminum dissolved in the reaction process of aluminum oxide.

[0037] Step B: Hexaaminoplatinum nitrate and gallium nitrate are dissolved in a certain amount of deionized water or other solvents to form solution B, and the hydrotalcite-modified Al obtained in step (1) is 2 o 3 Immerse in solution B, let stand for 12h, then dry at 80°C for 12h. The molar ratio of hexaaminoplatin...

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Abstract

The invention relates to a method for controlling high dispersion of active centers of a supported metal catalyst. The method belongs to the technical field of structural control of the active centers of the supported metal catalyst. The catalyst is formed by loading the active centers on hydrotalcite in-situ modified aluminium oxide and realizes control of a dispersion state of the metal active centers by using a lattice-inducing effect of hydrotalcite laminate on the metal active centers of platinum on the laminate. The method can increase a dispersion degree of the active centers and realizes a better catalytic effect.

Description

technical field [0001] The invention belongs to the technical field of controlling the structure of the active center of the supported catalyst, and in particular provides a method for controlling the highly dispersed metal center of the supported catalyst. Background technique [0002] In the process of the development of modern society, petroleum has become one of the most important energy sources in our life. With the development of society, people's demand for energy is increasing, while oil reserves are decreasing year by year. "Efficient utilization of oil resources" has become the most critical issue facing all mankind. Gasoline, as an important petroleum product, is playing a more and more important role in modern life. The protection of the environment has also become another key issue of concern to all human beings in the process of social development. As the requirements for environmental protection become higher and higher, the requirements for the composition o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/62B01J23/89C10G35/09C07C5/41C07C5/27C07C4/06C07C9/16C07C15/06
CPCY02P20/52
Inventor 何静王文龙安哲
Owner BEIJING UNIV OF CHEM TECH
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