Catalyst for preparing methyl glycolate through dimethyl oxalate hydrogenation and synthetic method of catalyst

Abstract

The invention discloses a catalyst for preparing methyl glycolate through dimethyl oxalate hydrogenation and a synthetic method of the catalyst, belonging to the technical field of preparation of methyl glycolate catalysts. The catalyst is prepared by taking NaOH as a precipitator, wherein Cu is a main active ingredient of the catalyst, alkaline silica sol serves as a carrier, one or more base metals in Mn, Zr and Zn serve as aids, the mass content of metal copper is 10-40 percent, the content of the other base metal aids is 5-10 percent, and the carrier content is 60-80 percent. According to the catalyst, the preparation method is simple, raw materials are readily available, preparation repeatability is high, high reaction activity is achieved in a methyl glycolate preparation reaction through the dimethyl oxalate hydrogenation, and the catalyst stability and the selectivity of the methyl glycolate are high.

Description

technical field [0001] The invention relates to a catalyst synthesis method for preparing methyl glycolate by hydrogenating dimethyl oxalate, and belongs to the technical field of methyl glycolate catalyst preparation. technical background [0002] Methyl glycolate (MG) is the simplest type of alkyd ester. It is an urgently needed chemical in the fields of high-end pesticides, medicines, and chemical environmental protection. Anti-carrier additive raw material for oil extreme pressure and wear resistance. In addition, methyl glycolate is a compound with hydroxyl, carbonyl and α-H functional groups at the same time. As an intermediate, a series of important downstream products can be prepared, such as hydrolysis to prepare glycolic acid, hydrogenation to prepare ethylene glycol, carbonylation to prepare propane Dimethyl diacid and ethyl acetoacetate, ammonia solution to prepare DL-glycine, oxidative dehydrogenation to prepare glyoxylate, etc. [0003] There are many traditi...

AI Technical Summary

Problems solved by technology

[0003] There are many traditional synthesis methods of methyl glycolate, and most of these traditional processes have deficiencies, such as the one-step synthesis of glyoxal and methanol to prepare MG, the glyoxal in the raw material is too toxic and expensive, and is not suitable for industrialization Production; the addition method of formaldehyde and hydrocyanic acid, the raw material hydrocyanic acid is highly toxic, and it is not suitable for large-scale production even if the yield is high; the coupling method is mostly catalyzed by liquid and solid strong acids, and there is serious corrosion and reaction pressure high defect

[0005] From the existing literature, in the reaction of preparing methyl glycolate by hydrogenation of dimethyl oxalate, most catalysts have used copper-based catalysts modified by adding precious metals such as Ag, Au, Pt and Ru (CN 101954288, CN 101700496), the selectivity of the target product methyl glycolate can be greatly improved, but the addition of noble metals increases the production cost of the catalyst. If non-precious metals can be used as additives, the production cost of the catalyst can be reduced