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Method for preparing load type rhodium catalyst for making high-carbon aldehyde using hydroformylation of higher olefins

A technology for carbon olefin hydroformyl and rhodium catalysts, which is applied in the field of preparation of supported rhodium catalysts, and can solve problems such as low catalyst activity, difficult catalyst separation, and rhodium loss

Inactive Publication Date: 2008-02-06
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is exactly to avoid the weak point of above-mentioned prior art and provides a kind of preparation method of modified gac-supported phosphoric acid-rhodium catalyst, this technology is mainly aimed at the low catalyst activity in the current high carbon olefin hydroformylation reaction, Catalyst separation is difficult and rhodium loss is serious, and its preparation process includes carrier activated carbon pretreatment-activated rhodium immobilization combination and other technologies, which are used in gas-liquid-solid three-phase catalytic system

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Carrier pretreatment: Weigh 5.0gKOH, 0.5gNaOH, 0.5gKCl and mix them, dissolve them in deionized water, weigh 5.0g of petroleum coke-based carrier activated carbon, soak the carrier activated carbon at 45°C for one day with an activator aqueous solution, and then soak the carrier activated carbon at 100°C Dry under vacuum for 12h. After being fully dried, place it in a tube furnace, raise the temperature to 750°C and stay for 0.5h under an inert gas atmosphere. After secondary activation, it was cooled to room temperature under an inert atmosphere, washed repeatedly with deionized water until the pH value was 9.4, and finally fully dried and stored for future use.

[0021] Active rhodium immobilization: Weigh 0.5g of pretreated carrier activated carbon, dissolve 0.0126g of rhodium trichloride in deionized water, impregnate at normal pressure at 45°C for 12h, and fully dry at 100°C under vacuum for 12h. Same as above, use 0.16mol / dm 3 Phosphoric acid solution 1.4cm 3 T...

Embodiment 2

[0025] Except that woody activated carbon is used as a carrier and the secondary activation temperature is 650° C., other steps are the same as in Example 1.

Embodiment 3

[0027] Except that the secondary activation temperature is 700° C., other steps are the same as in Example 2.

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PUM

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Abstract

A modified activated carbon supported rhodium type catalyst for high carbene hydrocarbon hydrogen formylation reaction is provided. The preparation of the catalyst comprises the techniques such as carrier pretreatment-activity rhodium solid-phase bound reagent combination, and used for gas-liquid-solid three phase catalyst system, which is characterized in that: a certain amount of alkali or alkaline earth metal hydroxide and salt modification activated carbon is used as a carrier, and the supported rhodium catalyst is prepared by using multiple impregnation method. The catalyst of the present invention is high in activity and selectivity. The catalyst is easy to be separated from products after reaction, capable of being used repeatedly, stable in performance, and suitable for the production process of high carbene hydrocarbon or mixed olefin hydrogen formylation made high carbon aldehyde, which has good industrial application value.

Description

technical field [0001] The invention relates to a preparation method of a supported rhodium catalyst used for the hydroformylation of high-carbon olefins or mixed olefins to produce high-carbon aldehydes, and belongs to the field of research and development of modified activated carbon-supported rhodium catalysts. The preparation of the catalyst includes carrier pretreatment-activated rhodium immobilization and other technologies, and is used in a gas-liquid-solid three-phase catalytic system. Its main technical feature is to use a certain amount of alkali or alkaline earth metal hydroxide and salt-modified activated carbon as the carrier, and use the multiple impregnation method to prepare the supported rhodium catalyst. The catalyst of the invention has high activity and selectivity, is easy to separate the catalyst from the product after the reaction, can be used repeatedly, and has stable performance, and is suitable for the production process of high-carbon aldehydes prod...

Claims

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Application Information

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IPC IPC(8): B01J23/46B01J21/18B01J37/02C07C45/49C07C47/02
Inventor 杨国华刘雪暖马占华
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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