Alcoholysis catalyst comprising palladium and metal oxides loaded by mesoporous molecular sieve and preparation method thereof

Abstract

The invention discloses an alcoholysis catalyst comprising palladium and metal oxides loaded by a mesoporous molecular sieve and a preparation method thereof. The preparation method comprises the step that a palladium chloride solution is physically adsorbed on a SBA-15 mesoporous molecular sieve; carbon monoxide is fed into the SBA-15 mesoporous molecular sieve so that palladium chloride is reduced into metal palladium and the metal palladium is loaded on the SBA-15 mesoporous molecular sieve; an aluminum acetate-magnesium acetate-titanium acetate-rare earth metal acetate mixed solution is physically adsorbed on the SBA-15 mesoporous molecular sieve; and the SBA-15 mesoporous molecular sieve is calcined so that palladium and metal oxides are loaded on the SBA-15 mesoporous molecular sieve. Through utilization of the alcoholysis catalyst, a triethyl phosphate yield and triethyl phosphate purity are greatly improved. The alcoholysis catalyst can be separated easily and can be recycled.

Description

technical field [0001] The invention relates to the field of organic reaction catalysts, in particular to a mesoporous molecular sieve-loaded palladium and metal oxide alcoholysis catalyst and a preparation method thereof. Background technique [0002] Triethyl phosphate is an important class of high boiling point solvents, plasticizers for rubber and plastics, chemical reaction catalysts and pesticide raw materials, such as triethyl phosphate is a solvent for cellulose nitrate and cellulose acetate, and keeps organic peroxidation solvents for catalyst activity, polyester resins, peroxide diluents for curing catalysts for epoxy resins, vinyl fluoride dispersants, chlorine-based insecticides and stabilizers, stabilizers for phenolic resins, and xylenol formaldehyde resins Curing agent, as well as phenolic resin, vinyl chloride, plasticizer of vinyl acetate polymer, flame retardant of polyester resin, the most economical synthesis method of triethyl phosphate is to use ...

AI Technical Summary

Problems solved by technology

DE 899 498 C and US 2,636,048 propose to use nitrogen or inert gas to blow out HCl to reduce side reactions, but by comparison, the highest yield in these methods is 75.9%, and a large amount of by-product monochloroethane is produced, polluting Air, the product has low purity, and the purity of the product after vacuum distillation is only 96.8%, which cannot meet the needs of high purity and high yield

At present, it is reported in the literature that it is a homogeneous catalyst-free reaction, and there is no report on the preparation of triethyl phosphate by heterogeneous catalysis.

Images