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

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...

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 ruthenium has high activity and is relatively cheap compared to other noble metals. However, Al 2 o 3 It is easy to react with organic acids, so the catalyst is unstable in the hydrogenation of maleic acid