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 small surface area carbon generation, long service life and reduced side reactions

Active Publication Date: 2014-04-02
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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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] Get the clover shape Ni-Zn-K / diatomite catalyst 50 grams of diameter 3mm (volume 72ml, the mass percentage content of Ni, Cr, Mo and K is respectively 28%, 12% and 3.5%, the balance is diatomite ), the catalyst is loaded into a fixed bed reactor (diameter 25mm, length 1000mm, with six temperature display control points). After the reactor temperature is stabilized at 80°C, the hydrogen containing 3vol% methyltriethoxysilane is passed into the reactor, the flow rate is controlled at 300ml / min, and the temperature is raised to 120°C after maintaining 80°C for 2 hours. Keep for 1 hour to stop the hydrogen gas containing methyltriethoxysilane, add nitrogen to lower the temperature, and obtain catalyst Cat-1.

[0059] Compare Ni-Zn-K / diatomaceous earth and Cat-1 by Fourier transform infrared spectrometer (FTIR), the characteristic peak of the methyl group on Cat-1 (~2970cm -1 ) is obviously stronger than Ni-Zn-K / diatomite, and the characteristic peak of hydroxyl group (~375...

Embodiment 2

[0063] Take a strip Cu-Cr-Ba / Al with a diameter of 3mm 2 o 3 -SiO 2 Catalyst 15 grams (produced by Beijing Research Institute of Chemical Industry, volume 24ml, the mass percentage content of Cu, Cr and Ba is respectively 28%, 12% and 2%, the balance is Al 2 o 3 -SiO 2 ), the catalyst is packed in a 500ml three-necked bottle, and the three-necked bottle is placed in an oil bath. One of the three-necked bottles is connected to a cooling coil, one is connected to a thermometer, and the other is connected to a feed inlet. First, 80ml of p-xylene was poured into the three-neck flask, and after the temperature of the reactor was stabilized at 110°C, 8ml of hexamethylsilazane was passed into the reactor. After maintaining 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 lowered. The catalyst was taken out and dried in an oven at 160°C for 3 hours to obtain catalyst Cat-3.

[0064] Com...

Embodiment 3

[0068] The catalysts of Example 1 and Comparative Example 1 were respectively applied to gas-phase hydrogenation of acetone to isopropanol. The hydrogenation reactor is a 100ml isothermal fixed bed, and the catalyst is 10.0g. The technological conditions of hydrogenation reaction are as table 1 (selectivity refers to isopropanol selectivity). After 800 h of reaction, the amount of carbon deposition was compared by thermogravimetry-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 surface area of ​​the catalyst, and low deactivation rate.

[0070] Table 1 Catalyst catalytic reaction performance of embodiment 1 and comparative example 1

[0071]

[0072] Determination of carbon deposition: Thermogravimetry-mass s...

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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 processes for the hydrogenation of ketones to produce alcohols and the dehydrogenation of alcohols to ketones. Background technique [0002] 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 industry, and the dehydrogenation of ketones to alcohols as its reverse reaction is also often used in the production of ketones. As a long-developed industry, the source of hydrogen atoms in ketone hydrogenation can be hydrogen gas or reducing substances containing hydrogen atoms (such as formic acid, alcohol, hydrazine hydrate, etc.). The former is the mainstream method for hydrogenation of ketones, which is mainly used for large-scale production of alcohols and requires the use of metal catalysts, while the latter is often used in small-scale synthesis of medicines and organic inte...

Claims

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Application Information

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Patent Type & Authority Patents(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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