Process for producing unsaturated glycol diester and solid catalyst based on Rh and Te

摘要

A solid catalyst comprising rhodium and tellurium wherein the coordination number ratio (Rh-Te/Rh-Rh) measured in the Extended X-ray Absorption Fine Structure (hereafter indicated as "EXAFS") measurement at Rh-K edge is in a range between 50/50 and 99/1. A solid catalyst comprising rhodium and tellurium wherein the nearest atomic distance measured in EXAFS measurement at Rh-K edge is in a range between 2.74 and 3.00 ANGSTROM . A solid catalyst comprising at least one 8th group metal M selected from Rh, Pt and Pd and Te wherein the atomic ratio between Te and M (Te / M) in the solid catalyst is from 0.45 to 1.4. A method for the production of unsaturated glycol diester in which conjugated diene reacts with carboxylic acid and molecular oxygen in the presence of solid catalyst comprising rhodium and tellurium in the liquid phase under pressure. A method for preparing the solid catalyst containing rhodium and tellurium comprising supporting rhodium compound and tellurium compound on an inorganic porous carrier, heating to a temperature of 70 DEG C or more in the presence of inert gas, and reducing the catalyst by introducing reducing gas while maintaining high temperature. A method for preparing the solid catalyst containing rhodium and tellurium comprising immersing inorganic porous carrier in a solution containing rhodium compound and tellurium compound dissolved in it. <IMAGE>