Catalytic agent for synthesizing succinic acid through maleic acid hydrogenation and preparation method thereof

A catalyst, succinic acid technology, applied in chemical instruments and methods, preparation of carboxylic acid by ozone oxidation, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problems of unstable, uneconomical and expensive catalysts

Inactive Publication Date: 2012-05-02
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the supported palladium catalyst has good activity, it is expensive and uneconomical
Prakash D Vaidya v et al. Ru/Al 2 o 3 As a catalyst for hydrogenation reaction, its active component ruthe

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] After mixing 100ml of ruthenium chloride solution with a concentration of 10.0mg / ml and 19.5g of activated carbon carrier evenly, add 1mol / L sodium hydroxide dropwise to it under stirring at 80°C to adjust the pH value to 9, and then maintain 5h; filter the mixture, and wash the solid precipitate with distilled water until there is no Cl - , dry naturally. Then, reduce with hydrogen at 200°C for 5h, and the hydrogen space velocity is 500h -1 , to obtain ruthenium catalyst 1.

Embodiment 2

[0018] After mixing 300ml of ruthenium chloride solution with a concentration of 0.1mg / ml and 14.6g of activated carbon support, add 10mol / L of sodium hydroxide dropwise to it under stirring at 15°C to adjust the pH value to 14, and then maintain 24h; filter the mixture, and wash the solid precipitate with distilled water until there is no Cl - , dry naturally. Then, reduce with hydrogen at 150°C for 24h, and the hydrogen space velocity is 200h -1 , to obtain ruthenium catalyst 2.

Embodiment 3

[0020] After mixing 80ml of ruthenium chloride solution with a concentration of 50.0mg / ml and 19.5g of activated carbon carrier evenly, add 0.1mol / L of potassium carbonate dropwise to it under stirring at 95°C to adjust the pH value to 7, and then maintain 0.5h; filter the mixture, and wash the solid precipitate with distilled water until there is no Cl - , dry naturally. Then, reduce at 450°C with nitrogen / hydrogen mixed gas for 1h, and the space velocity of the mixed gas is 1000h -1 , to obtain ruthenium catalyst 3.

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PUM

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Abstract

The invention relates to a catalytic agent for synthesizing succinic acid through maleic acid hydrogenation; the catalytic agent comprises the following components in percent by weight: 0.1-10% of active component ruthenium and 80-99.9% of acid resistance carrier. A preparation method of the catalytic agent comprises the following steps of: uniformly mixing a ruthenium chloride solution with the concentration of 0.1-50.0mg/ml and the carrier, adding an alkaline solution into mixed liquor under stirring at the temperature of 15-95 DEG C, adjusting pH value to be 6-14, and then maintaining for 0.5-24h; filtering the mixed liquor, washing solid precipitates by using distilled water till Cl <-> does not exist, drying naturally, and then feeding reducing gas at the temperature of 150-450 DEG C and reducing for 1-24h, wherein space velocity of the reducing gas is 200-100h<-1>, and obtaining the ruthenium catalytic agent. The catalytic agent has the advantages of good stability, low cost, high activity and high selectivity.

Description

technical field [0001] The invention provides a catalyst for synthesizing succinic acid by hydrogenation of maleic acid and a preparation method thereof. Background technique [0002] Succinic acid, also known as succinic acid, is an important chemical raw material, widely used in surfactants, electroplating, medicine, food and other fields. In recent years, it has seen a sharp increase in demand as the main raw material for the biodegradable plastic polybutylene succinate (PBS). [0003] At present, succinic acid is mainly prepared by electrochemical method and catalytic hydrogenation method. The production practice of the electrochemical method shows that it has disadvantages such as high energy consumption, easy damage of the ion membrane, serious consumption of the anode, and poor process operating conditions. The catalytic hydrogenation method can synthesize succinic anhydride by hydrogenation of maleic anhydride, and then hydrolyze to prepare succinic acid, or direct...

Claims

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Application Information

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IPC IPC(8): B01J23/46C07C55/10C07C51/36
Inventor 高志贤郗宏娟庆绍军侯晓宁胡蕴青李林东
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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