Process for synthesizing dibutyl carbonate

Abstract

The invention discloses a process for synthesizing dibutyl carbonate through the catalysis of load type catalyst, wherein alkali metal hydroxide, alkali metal halides, alkali metal carbonates are loaded onto active aluminium oxide, activated charcoal, or molecular sieve carrier through vacuum dipping method, thus obtaining solid catalyst.

Description

technical field [0001] The invention relates to a method for catalytically synthesizing dibutyl carbonate with a supported catalyst. Background technique [0002] Dialkyl carbonates are used in lithium-ion batteries because of their good electrochemical stability, high flash point and low melting point in the electrochemical field. Among them, dibutyl carbonate has a large Molecular weight, its flash point, oxidation resistance are improved, thereby the electrochemical stability of lithium-ion battery electrolyte and the safety of battery are also improved accordingly (Barker, Jeremy, et al, Carbonaceous electrode and compatible electrolyte [P], U S Patent, 5643 695, 1997; Zhuang Quanchao, Wu Shan, etc., Research on Organic Electrolyte for Lithium-ion Batteries, Vol. VII, No. 4, 2001), there are two main problems in the traditional synthesis method, one is that the method should be a reversible reaction , the conversion rate of raw materials is low, and the other is that th...

AI Technical Summary

Problems solved by technology

[0002] Dialkyl carbonates are used in lithium-ion batteries because of their good electrochemical stability, high flash point and low melting point in the electrochemical field. Among them, dibutyl carbonate has a large Molecular weight, its flash point, oxidation resistance are improved, thereby the electrochemical stability of lithium-ion battery electrolyte and the safety of battery are also improved accordingly (Barker, Jeremy, et al, Carbonaceous electrode and compatible electrolyte [P], U S Patent, 5643 695, 1997; Zhuang Quanchao, Wu Shan, etc., Research on Organic Electrolyte for Lithium-ion Batteries, Vol. VII, No. 4, 2001), there are two main problems in the traditional synthesis method, one is that the method should be a reversible reaction , the conversion rate of raw materials is low, and the other is that the traditionally used carbonylation reagents such as phosgene have certain toxicity, causing great pollution to the production process and the environment. Dimethyl carbonate, a new green chemical, has been Come out, because it is a non-toxic chemical, and because of the superiority of its own structure, it can be used as a carbonylation reagent, or a good methylation reagent, and can replace phosgene, dimethyl sulfate, and methylene chloride Toxic reagents such as dimethyl carbonate have been formed as a new synthetic block (S.Memoli, M.Selva, Dimethylcarbonate foreco-friendly methylation reactions, Chemosphere 43 (2001) 115-121; Yoshio Ono, Dimethyl carbonate for environmentally bengin reactions, Catalysis Today 35 (1997) 15-25)