Highly dispersed CuZnTi catalyst for hydrogenation of catalytic maleic anhydride to gamma-butyrolactone and preparation method thereof

Abstract

The invention provides a highly dispersed CuZnTi catalyst for hydrogenation of catalytic maleic anhydride to gamma-butyrolactone and a preparation method thereof, belonging to the technical field of catalytic materials. The CuZnTi catalyst is prepared by properly calcining carbonate pillared copper-zinc-titanium houghite used as a catalyst precursor. In the catalyst precursor, the atomic ratio of Cu, Zn and Ti is 0.5:2:1-2.5:2:1. The CuZnTi catalyst comprises the following components in percentage by mass: 11.4-36.2 percent of Cu, 29.5-46.4 percent of Zn and 10.9-17.0 percent of Ti, and the specific surface area of the CuZnTi catalyst is 60.3-125.9m2 / g. When the CuZnTi catalyst reacts for 2 hours at the temperature of 200 DEG C under the pressure of 4.0 MPa, the conversion rate of series CuZnTi catalyst for hydrogenation of catalytic maleic anhydride is 88.2-99.6 percent, and the selectivity of the gamma-butyrolactone is 80.7-89.8 percent. The invention has the advantages of being applied to maleic anhydride liquid phase hydrogenation reaction and obtaining higher catalytic activity under lower reaction temperature and pressure.

Description

technical field [0001] The invention belongs to the technical field of catalytic materials, and in particular provides a highly dispersed copper-zinc-titanium (CuZnTi) catalyst for catalyzing the hydrogenation of maleic anhydride to γ-butyrolactone and a preparation method thereof. technical background [0002] Highly dispersed metal catalysts are widely used in catalytic reactions such as dehydrogenation, hydrogenation and reforming, and are the most important type of catalysts in petroleum refining and petrochemical processes. The hydrogenation of maleic anhydride to prepare γ-butyrolactone is an important method to selectively synthesize γ-butyrolactone by selecting different catalysts from maleic anhydride and its derivatives. In 2003, Jung et al. (Catal. Today, 2003, 87, 171; J. Mol. Catal. Part A: Chem, 2003, 198, 297) investigated the noble metal Pd-Sn / SiO 2 The catalytic activity of the catalyst for the liquid-phase hydrogenation of maleic anhydride, when the reacti...

AI Technical Summary

Problems solved by technology

In 2006, Hu Tongjie et al. (Industrial Catalysis, 2006, 14:41) prepared CuZnTi catalyst by co-precipitation method, which was applied in the gas phase hydrogenation reaction of maleic anhydride. Compared with copper-zinc-chromium and copper-zinc-aluminum catalysts, the reaction temperature was The CuZnTi catalyst has high activity at 245°C, but when the reaction temperature is lowered to 225°C, the activity drops significantly

[0005] So far, there has been no report on the preparation of highly dispersed CuZnTi catalysts using layered precursors and their application in the liquid-phase hydrogenation of maleic anhydride