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Catalytic conversion method of ketone and alcohol

The technology of a catalyst and a hydrogenation catalyst is applied in the field of hydrogenation of ketones to prepare alcohols and dehydrogenation of alcohols to ketones, and achieves the effects of long service life, high selectivity and reduced side reactions

Active Publication Date: 2012-04-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The above-mentioned technical methods have improved the selectivity of the target product to a certain extent, and reduced side reactions such as condensation and etherification. However, with the continuous improvement of product quality requirements and the consideration of downstream energy consumption in the industry, the selectivity of the target product is still need to improve

Method used

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  • Catalytic conversion method of ketone and alcohol
  • Catalytic conversion method of ketone and alcohol
  • Catalytic conversion method of ketone and alcohol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Take 50 grams of clover-shaped Ni-Zn-K / diatomite catalyst with a diameter of 3mm (volume 72ml, the mass percentage content of Ni, Cr, Mo and K are 28%, 12% and 3.5% respectively, and the balance is diatomite ), the catalyst was charged into a fixed-bed reactor (25 mm in diameter, 1000 mm in length, with six temperature display control points). After the reactor temperature was stabilized at 80 °C, hydrogen containing 3 vol% methyltriethoxysilane was introduced into the reactor, the flow rate was controlled at 300 ml / min, maintained at 80 °C for 2 hours, and then heated to 120 °C. After the temperature stabilized The hydrogen gas containing methyltriethoxysilane was stopped for 1 hour, and nitrogen was added to cool down to obtain catalyst Cat-1.

[0059] Comparison of Ni-Zn-K / diatomite and Cat-1, the characteristic peaks of methyl groups on Cat-1 (~2970 cm) by Fourier transform infrared spectroscopy (FTIR) -1 ) was significantly stronger than that of Ni-Zn-K / diatomite,...

Embodiment 2

[0063] Take a strip of Cu-Cr-Ba / Al with a diameter of 3mm 2 O 3 -SiO 2 Catalyst 15g (produced by Beijing Institute of Chemical Industry, volume 24ml, mass percentage content of Cu, Cr and Ba are 28%, 12% and 2% respectively, the balance is Al 2 O 3 -SiO 2 ), put the catalyst into a 500ml there-necked bottle, the three-necked bottle is placed in an oil bath, one of the three-necked bottle is connected to a cooling coil, the other is connected to a thermometer, and the other is connected to a feed port. First, pour 80 ml of p-xylene into the three-necked flask, and after the temperature of the reactor is stabilized at 110° C., pass 8 ml of hexamethylsilazane into the reactor. After maintaining at 110°C for 1 hour, the temperature was raised to 140°C. After the temperature was stabilized, the temperature was maintained for 1 hour and then cooled down. The catalyst was taken out and dried in an oven at 160°C for 3 hours to obtain catalyst Cat-3.

[0064] Comparison of Cu-Cr-B...

Embodiment 3

[0068] The catalysts of Example 1 and Comparative Example 1 were respectively applied to the gas-phase hydrogenation of acetone to isopropanol. The hydrogenation reactor is a 100ml isothermal fixed bed, and the catalyst is 10.0g. The process conditions of the hydrogenation reaction are shown in Table 1 (selectivity refers to isopropanol selectivity). After 800h of reaction, the carbon deposition amount was compared by thermogravimetric-mass spectrometry.

[0069] The reaction conditions are shown in Table 1, wherein the molar ratio of hydrogen to acetone is 8.0. The results are shown in Table 1. The experiment shows that compared with the existing method, the method of the present invention has high target selectivity, low carbon content on the catalyst surface area, and low deactivation rate.

[0070] Table 1 The catalytic reaction performance of the catalysts of Example 1 and Comparative Example 1

[0071]

[0072] Determination of carbon deposition: thermogravimetric-...

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Abstract

The invention discloses a method for producing an alcohol by hydrogenizing a ketone or producing a ketone by dehydrogenizing an alcohol. In order to meet the two requirements that the selectivity of the reaction for producing the alcohol by hydrogenizing the ketone or producing the ketone by dehydrogenizing the alcohol can be increased and the service life of a catalyst can be prolonged, the ketone or alcohol is used as a raw material to contact a hydrogenation catalyst in a hydrogen atmosphere, and catalytic conversion is performed to obtain the corresponding alcohol or ketone, wherein the catalyst comprises a carrier, a metal active component and a silane group, the metal active component is one or more of nickel, cobalt and copper, the silane group of the catalyst is grafted through silylation treatment and the silane group accounts for 0.05wt%-25wt% of the total weight of the catalyst. Compared with the existing catalyst, the catalyst has high selectivity; the yield of by-products, namely ether, olefin, alkane and ketal is greatly reduced; and the amount of deposited carbon is low and the catalyst has longer service life.

Description

technical field [0001] The present invention relates to a method for preparing alcohol by hydrogenation of ketone and dehydrogenating alcohol to ketone. Background technique [0002] Both alcohols and ketones are important chemicals with a wide range of uses in industry and everyday life. The hydrogenation of ketones is an important method for the preparation of monohydric alcohols in the industry, and the dehydrogenation of ketones to alcohols as its reverse reaction is also often used in the production of ketones. As a long-established industry, the source of hydrogen atoms in ketone hydrogenation can be hydrogen or reducing substances containing hydrogen atoms (such as formic acid, alcohol, hydrazine hydrate, etc.). The former is the existing mainstream ketone hydrogenation method, which is mainly used for the large-scale production of alcohols and requires the use of metal catalysts, while the latter is often used in small-scale synthesis such as medicine and organic in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/145C07C31/10C07C31/12C07C31/125C07C35/06C07C35/08C07C31/20C07C45/29C07C49/08C07C49/10C07C49/395C07C49/04C07C49/403B01J31/28B01J31/34
Inventor 黄龙田保亮唐国旗彭晖戴伟
Owner CHINA PETROLEUM & CHEM CORP
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