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Platinum-tantalum bimetallic catalyst for producing n-butanol and preparation method and application thereof

A technology of bimetallic catalysts and production methods, which is applied in the direction of metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, preparation of hydroxyl compounds, etc., can solve the problems of complex preparation procedures and high energy consumption, and achieve improved reaction High efficiency, high catalytic activity, and simple preparation method

Active Publication Date: 2019-03-29
SOUTHWEST RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN 1216838C reports a method for producing butanol by ethanol condensation, using magnesium, cobalt, nickel, palladium, and iron salts as catalyst active components, and alumina as a catalyst carrier. Patent 101530802B discloses a method for producing butanol from ethanol , with nickel-magnesia or nickel-potassium fluoride as the active component and alumina as the carrier, these catalysts need to be reduced at a high temperature above 300 ° C, high energy consumption, and complicated preparation procedures

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Dissolve 0.6g of platinum nitrate, 3.2g of potassium fluorotantalate and 0.2g of lanthanum nitrate into deionized water, heat and dissolve to obtain a mixed solution; add 60g of silicon dioxide to the prepared mixed solution, and spin dry at 100°C Dried in a cylinder for 6 hours, then calcined at 500°C for 6 hours to obtain the catalyst.

[0024] All the catalysts prepared above are loaded into the fixed bed reactor, and absolute ethanol is injected into the reactor with a metering pump, the feed rate is 0.6mL / min, and nitrogen is used as the carrier. When the reaction pressure is 3.5MPa and the reaction temperature is The reaction was carried out at 340° C., and the product was analyzed by gas chromatography after cooling. The single-pass conversion rate of ethanol was 48.1%, the selectivity of n-butanol was 68.3%, and the selectivity of hexanol was 7.9%.

Embodiment 2

[0026] Dissolve 0.9 g of chloroplatinic acid, 2.4 g of sodium tantalate and 0.2 g of erbium nitrate into deionized water, heat and dissolve to obtain a mixed solution; add 60 g of silicon dioxide to the prepared mixed solution, and spin dry at 100°C The catalyst was obtained by drying in a cylinder for 10 hours, and then calcining at 500°C for 6 hours.

[0027] All the catalysts prepared above are loaded into the fixed bed reactor, and absolute ethanol is injected into the reactor with a metering pump, the feed rate is 0.6mL / min, and nitrogen is used as the carrier. When the reaction pressure is 3.5MPa and the reaction temperature is The reaction was carried out at 340° C., and the product was analyzed by gas chromatography after cooling. The single pass conversion rate of ethanol was 51.1%, the selectivity of n-butanol was 64.0%, and the selectivity of hexanol was 8.8%.

Embodiment 3

[0029] Dissolve 0.1 g of chloroplatinic acid, 2.4 g of sodium tantalate and 0.1 g of cerium nitrate into deionized water, heat and dissolve to obtain a mixed solution; add 60 g of silicon dioxide to the prepared mixed solution, and spin dry at 100°C The catalyst was obtained by drying in a cylinder for 10 hours, and then calcining at 500°C for 6 hours.

[0030] All the catalysts prepared above are loaded into the fixed bed reactor, and absolute ethanol is injected into the reactor with a metering pump, the feed rate is 0.6mL / min, and nitrogen is used as the carrier. When the reaction pressure is 3.5MPa and the reaction temperature is The reaction was carried out at 340° C., and the product was analyzed by gas chromatography after cooling. The single pass conversion rate of ethanol was 48.0%, the selectivity of n-butanol was 55.0%, and the selectivity of hexanol was 7.3%.

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Abstract

The invention belongs to the field of the chemical industry, and in particular relates to a platinum-tantalum bimetallic catalyst for producing n-butanol and a preparation method and application thereof. The catalyst uses platinum-tantalum bimetal as an active component and rare earth metal as an auxiliary agent; a catalyst carrier is silicon dioxide. The catalyst is prepared by loading the activecomponent and auxiliary agent by an impregnation method, and then carrying out roasting. The catalyst is used, ethanol is used as a raw material and nitrogen is used as a carrier and a gas-solid heterogeneous reaction is performed under the reaction pressure of 2-5 MPa and the reaction temperature of 260-350 DEG C to obtain n-butanol. By using ethanol as the raw material to produce butanol, the dependence on petroleum is eliminated, and hexanol with higher added value is co-produced, and the economic benefit is good. The by-product of the reaction is water, which is green and environmentallyfriendly. The preparation method of the invention is simple and has strong replicability and popularization. In addition, the catalyst does not need to be reduced before the reaction, thus reducing the reaction steps, facilitating the operation and reducing the energy consumption.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a palladium-gallium bimetallic catalyst for producing n-butanol, a preparation method and application thereof. Background technique [0002] N-butanol is an important organic chemical raw material, mainly used in the production of coatings and adhesives, and can also be used as raw materials for other derivatives. At present, n-butanol is mainly used to produce butyl acrylate and butyl methacrylate, accounting for about 32% of the total consumption of n-butanol. It is also used to produce butyl acetate, dibutyl phthalate and other esters. Accounting for about 67% of the total consumption of n-butanol, these esters of n-butanol can be used to produce latex architectural coatings, n-butanol can also be used as fabric manufacturing and rigid polyvinyl chloride impact modifier. About one tenth of the butanol is directly used as a solvent to supply the market, and the oth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/648C07C31/12C07C29/34
CPCB01J23/6486C07C29/34C07C31/12
Inventor 张华西李荣鄢义周拥华康仲良
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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