Method for preparing aluminum oxide loaded ruthenium catalyst

A ruthenium-based catalyst and alumina-supported technology, which is applied in the petrochemical field, can solve the problems of low activity, high production cost, and low ruthenium utilization rate of alumina-supported ruthenium-based catalysts, and achieves no obvious inhibitory effect, reduced production costs, The effect of high activity at low temperature and low pressure

Inactive Publication Date: 2013-09-18
SUZHOU TAILIDA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the Ru-Zn alloy catalysts that have been industrialized at present, the utilization rate of ruthenium is low, and the price is expensive, and it is very sensitive to elements such as S, Pd, As, etc., and the alumina-supported ruthenium-based catalyst can greatly reduce the amount of precious metal ruthenium , but because there are more acid centers on the surface of alumina, the activity of alumina-supported ruthenium-based catalysts is relatively low, and the production cost is relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Provide a kind of preparation method of aluminum oxide supported ruthenium-based catalyst, comprising the steps of:

[0015] (1) heating the alumina carrier, and adding auxiliary agents such as palladium to the surface of the alumina carrier;

[0016] (2) Continue to heat the alumina carrier, set the heater to 245°C, stop heating when the pH value of the surface of the alumina carrier is 7.7, and obtain an alumina-supported ruthenium-based catalyst, wherein the alumina carrier There is a relationship between the specific surface area and surface alkalinity and the firing temperature.

Embodiment 2

[0018] Provide a kind of preparation method of aluminum oxide supported ruthenium-based catalyst, comprising the steps of:

[0019] (1) heating the alumina carrier, adding potassium, palladium and other additives to the surface of the alumina carrier;

[0020] (2) Continue to heat the alumina carrier, the heater is set to 220° C., and when the pH value of the surface of the alumina carrier is 7.8, stop heating to obtain a ruthenium-based catalyst supported on alumina.

[0021] In the preparation method of the alumina-supported ruthenium-based catalyst disclosed in the present invention, the activity of the oxide-supported ruthenium-based catalyst is related to the electronegativity of the oxide carrier itself, that is, the acidity and alkalinity, and the smaller the electronegativity of the carrier, the stronger the alkalinity. The higher the activity of the catalyst, therefore, the activity of the alumina-supported ruthenium-based catalyst is relatively lower. However, a...

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PUM

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Abstract

The invention discloses a method for preparing an aluminum oxide loaded ruthenium catalyst. The method comprises the steps of: heating an aluminum oxide carrier; adding an assistant to the surface of the aluminum oxide carrier; further heating the aluminum oxide carrier; and stopping heating when the pH value of the surface of the aluminum oxide carrier is 7.6-8, so as to obtain the aluminum oxide load ruthenium catalyst. In the manner, the method for preparing the aluminum oxide load ruthenium catalyst provided by the invention is simple in preparation process; the production time can be shortened; the material and manpower costs are reduced; the production cost is greatly reduced; the obtained aluminum oxide load ruthenium catalyst is low in temperature and pressure, high in activity, unconspicuous inhibitional effect from ammonia, and good in stability and selectivity.

Description

technical field [0001] The invention relates to the field of petrochemical industry, in particular to a method for preparing an alumina-loaded ruthenium-based catalyst. Background technique [0002] A catalyst, also known as a catalyst, is a chemical reaction that can change the rate of other substances in a chemical reaction. It can not only increase the rate of a chemical reaction, but also reduce the rate of a chemical reaction, and its own quality and chemical properties have not occurred before and after the chemical reaction. changed substance. Some catalysts are single compounds, some are complex compounds, and some are mixtures. Catalysts are also selective, and different reactions use different catalysts, and the same reaction also has catalysts with different effects. [0003] In the Ru-Zn alloy catalysts that have been industrialized at present, the utilization rate of ruthenium is low, and the price is expensive, and it is very sensitive to elements such as S, ...

Claims

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Application Information

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IPC IPC(8): B01J23/46
Inventor 华凤男
Owner SUZHOU TAILIDA TECH
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