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Catalyst used for CO hydrogenation to prepare isobutanol, and method for preparing isobutanol through CO hydrogenation

A technology for producing isobutanol and catalysts, which is applied in the direction of metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, preparation of hydroxyl compounds, etc. It can solve the problem of large influence of temperature, high temperature, and influence on catalyst stability and other issues to achieve good stability, high activity and selectivity

Active Publication Date: 2015-11-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] From thermodynamic analysis, the reaction selectivity of directly producing mixed alcohols from synthesis gas is greatly affected by temperature, and there is a coupling effect; the control of reaction temperature is unstable, and side reactions are easy to occur; at the same time, because the carbon number distribution of alcohols still follows the Schulz -Flory law, the catalyst product is a mixture of alcohol and hydrocarbon, its carbon number distribution range is wide, the product is complex, the water content in the product is high, which affects the stability of the catalyst, and the subsequent separation of the product is more difficult
[0010] From the existing synthetic isobutanol catalyst system, it is found that: the catalyst with high selectivity of isobutanol in alcohol has the disadvantages of relatively harsh process conditions (25MPa, high temperature); Disadvantages such as low selectivity and complex product composition
The reported catalysts have high reactivity and selectivity to higher alcohols, but there are no industrialized research results

Method used

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  • Catalyst used for CO hydrogenation to prepare isobutanol, and method for preparing isobutanol through CO hydrogenation
  • Catalyst used for CO hydrogenation to prepare isobutanol, and method for preparing isobutanol through CO hydrogenation
  • Catalyst used for CO hydrogenation to prepare isobutanol, and method for preparing isobutanol through CO hydrogenation

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preparation example Construction

[0024] The present invention has no special requirements on the preparation method of the catalyst, as long as it meets the above composition. For example, when the catalyst described in the present invention is an alloy catalyst, it only needs to be formulated according to the composition of the catalyst of the present invention to prepare an alloy catalyst.

[0025] As another example, when the catalyst needs to be prepared as an amorphous alloy catalyst, its preparation method can also be a conventional preparation method in the field, and any existing method for preparing an amorphous alloy catalyst can be used. For the present invention, preferably said amorphous alloy catalyst can be prepared according to the following steps:

[0026] Zirconium, copper, silicon, aluminum and or not with one or more of Group IB metals other than copper, Group IIB metals, Group IVB metals other than zirconium, Group VB metals, Group VIB metals and Group VIII metals The metal is heated to m...

Embodiment 1

[0040] Add 1.5kg of zirconium, 0.5kg of copper, 0.1kg of cobalt, 0.5kg of silicon and 2.5kg of aluminum into a graphite crucible, heat it in a high-frequency furnace until it melts, and then spray the melt from the nozzle of the crucible to a speed of On the 800 rpm copper roller, cooling water is passed through the copper roller, the alloy liquid is rapidly cooled at a cooling rate greater than 1000°C / s, and then thrown out along the tangent of the copper roller to form scale-like strips, which are ground to The particle diameter is below 50 microns, resulting in a master alloy. Slowly add 50 g of the master alloy into a three-neck flask filled with 500 g of 20% by weight sodium hydroxide aqueous solution, control its temperature to 60°C and stir at a constant temperature for 1 hour, stop heating and stirring, and filter off the liquid; use 100°C distilled water Wash to pH 7. The prepared catalyst is numbered Catalyst-1, and the composition of Catalyst-1 is shown in Table 1....

Embodiment 2

[0042] Add 1.5kg of zirconium, 0.5kg of copper, 0.5kg of silicon and 2.5kg of aluminum into a graphite crucible, heat it in a high-frequency furnace until it melts, and then spray the molten liquid from the nozzle of the crucible to a rotating speed of 800 rpm On the copper roller, cooling water is passed through the copper roller, and the alloy liquid is rapidly cooled at a cooling rate greater than 1000°C / s and then thrown out along the tangent of the copper roller to form scale-like strips, which are ground to a particle diameter of 50 Below microns, a master alloy is obtained. Slowly add 50 g of the master alloy into a three-neck flask filled with 500 g of 20% by weight sodium hydroxide aqueous solution, control its temperature to 60°C and stir at a constant temperature for 1 hour, stop heating and stirring, and filter off the liquid; use 100°C distilled water Wash to pH 7. The prepared catalyst is numbered Catalyst-2, and the composition of Catalyst-2 is shown in Table 1...

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Abstract

The invention provides a catalyst used for CO hydrogenation to prepare isobutanol. The catalyst comprises 20-70wt% of zirconium, 5-40wt% of copper, 5-30wt% of silicon and 5-30wt% of aluminum. The invention also provides a method for preparing isobutanol through CO hydrogenation. The method is characterized in that a CO-containing raw material gas is in contact with a hydrogen-containing gas and the catalyst. The catalyst has higher activity and selectivity than routine catalysts and also has good stability when the catalyst is used in a CO hydrogenation reaction to prepare isobutanol.

Description

technical field [0001] The invention relates to a catalyst for producing isobutanol by hydrogenation of CO, in particular to a Zr-Cu-Si-Al multimetal catalyst which can convert synthesis gas into isobutanol with high activity and high selectivity and a A method for producing isobutanol by CO hydrogenation. Background technique [0002] From syngas (CO+H 2 ) Direct synthesis of low-carbon mixed alcohols (generally referring to C1-C5 alcohol mixtures) is an important branch of C1 chemistry. Low-carbon mixed alcohol is an excellent gasoline additive, which has good compatibility with gasoline, can increase the octane number of gasoline, promote the complete combustion of gasoline, and reduce environmental pollution. Isobutanol in low-carbon mixed alcohol is a good co-solvent, which can react with methanol generated at the same time to prepare methyl tert-butyl ether gasoline additive; isobutanol can also be used as an oil additive and aviation fuel additive to replace methyl ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/72C07C31/12C07C29/154
CPCY02P20/52
Inventor 张晓昕王宣孟祥堃宗保宁慕旭宏
Owner CHINA PETROLEUM & CHEM CORP