Palladium-carbon catalyst for preparing furan through furfural decarbonylation process, and preparation method thereof

A technology for decarbonylation to prepare furan and palladium-carbon catalysts, which is applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., to achieve good stability, high selectivity, catalyst long life effect

Active Publication Date: 2015-09-30
JIANGSU QINGQUAN CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, the catalytic efficiency and catalyst life of the above-mentioned furan decarbonylation to produce furan still need to be improved

Method used

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  • Palladium-carbon catalyst for preparing furan through furfural decarbonylation process, and preparation method thereof
  • Palladium-carbon catalyst for preparing furan through furfural decarbonylation process, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1) Get 10g of activated carbon (dry weight) carrier, pretreat the activated carbon with nitric acid, wash with deionized water, and dry.

[0032] 2) 1.25gPd(NO 3 ) 2 2H 2O was mixed with ammonia water to prepare an aqueous solution of palladium ammonia complex (40 g), and 0.36 g of cesium acetate was added, mixed evenly, quickly added to the above-mentioned activated carbon, and stirred for 4.0 h.

[0033] 3) At 80°C, add 2ml of formaldehyde, and stir for reduction for 4h;

[0034] 4) Cool, let stand overnight, filter, wash with deionization until the filtrate is neutral, and obtain a 5% Pd / C catalyst with a water content of 61.5%.

Embodiment 2

[0036] 1) Get 10g of activated carbon (dry weight) carrier, pretreat the activated carbon with nitric acid, wash with deionized water, and dry.

[0037] 2) 0.63gPd(NO 3 ) 2 2H 2 O was mixed with ammonia water to prepare palladium ammonium complex aqueous solution (40 g), and 0.18 g of potassium citrate was added, mixed evenly, quickly added to the above-mentioned activated carbon, and stirred for 4.0 h.

[0038] 3) At 80°C, add 2ml of formaldehyde, and stir for reduction for 4h;

[0039] 4) Cool, let stand overnight, filter, wash with deionization until the filtrate is neutral, and obtain a 2.5% Pd / C catalyst with a water content of 59.5%.

Embodiment 3

[0041] 1) Get 10g of activated carbon (dry weight) carrier, pretreat the activated carbon with nitric acid, wash with deionized water, and dry.

[0042] 2) 0.83gPdCl 2 Mix it with ammonia water to prepare palladium ammonium complex aqueous solution (40g), add 0.36g sodium carbonate, mix well, quickly add to the above-mentioned activated carbon, and stir for 4.0h.

[0043] 3) At 80°C, add 2ml of formaldehyde, and stir for reduction for 4h;

[0044] 4) Cool, let stand overnight, filter, wash with deionization until the filtrate is neutral, and obtain a 5% Pd / C catalyst with a water content of 61.5%.

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Abstract

The invention provides a method for preparing a palladium-carbon catalyst for preparing furan through the furfural decarbonylation process. According to the method, a precursor complex palladium chloride of an active component or a salt mixture of the palladium chloride with other noble metal salts is mixed with aqueous ammonia to form a palladium ammonia complex solution. The palladium ammonia complex solution is mixed with an auxiliary alkali metal salt and a carrier activated carbon to steep the auxiliary alkali metal salt and the carrier activated carbon and add a reducing agent so as to cause the occurrence of chemical reduction reaction. After that, through the solid-liquid separation process, the palladium-carbon catalyst can be obtained. The service life of the catalyst is significantly prolonged compared with that of a conventional catalyst in the prior art. Meanwhile, the furan production efficiency based on the furfural decarbonylation process is improved. The catalyst prepared in the present invention has the characteristics of high activity, high selectivity, long service life and good stability at the same time.

Description

technical field [0001] The invention relates to a palladium carbon catalyst for furan decarbonylation to furan and a preparation method thereof. Background technique [0002] Furan is an important raw material and solvent for organic synthesis, and is also used in the mass production of binders for hot box process cores. Furan can be used to prepare pyrrole, thiophene, tetrahydrofuran, etc. Furan is etherified and reduced to obtain 2,5-dimethoxydihydrofuran, which is hydrolyzed to generate 2-hydroxy-1,4-butanedialdehyde, which can be used in the production of anisodamine by synthetic method. When furan is etherified, reduced, and then catalytically hydrogenated to obtain 2,5-dimethoxytetrahydrofuran, it is hydrolyzed to generate succinic dialdehyde, which is the raw material for the synthesis of another alkaloid, atropine. The furan ammonium salt obtained after furan is acetylated, methoxyaminated, oximated, and ammoniated to form a salt is an important intermediate of cef...

Claims

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Application Information

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IPC IPC(8): B01J23/44C07D307/36
Inventor 刘建华吴宇民赖玉龙孟令坤刘长乐杨荣赵成业
Owner JIANGSU QINGQUAN CHEM CO LTD
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