Solid borne ionic liquid Cu salt catalyst as well as preparation method thereof and application in synthesis of dimethyl carbonate

Abstract

The invention provides a compound, the constitutional formula is shown as (1), in formula (1) the carrier is one of B type silicon gel and SBA-15 molecular sieve, n is 1-3, R is any one of CH3 and CH2CH3, X is any one of Cl, Br, I, Ac, NO3. The preparation method of the compound comprises the steps of preparing pyridine ionic liquid, preparing solid borne ionic liquid matrix and preparing solid borne ionic liquid Cu salt catalyst. The application of the solid borne ionic liquid Cu salt catalyst in the synthesis of dimethyl carbonate is further provided in the invention. The catalytic activityof the catalyst of the invention is improved, and the loss of the active center Cu ion and corrosion of equipment are reduced; with the catalyst prepared by the invention adopted in the synthesis of dimethyl carbonate, the conversion rate of the methyl alcohol achieves 17%, and the selectivity of the dimethyl carbonate achieves 97.6%.

Description

technical field The invention belongs to the technical field of catalysts, and in particular relates to an immobilized ionic liquid Cu salt catalyst, a preparation method thereof and an application of the catalyst. Background technique As a green organic solvent and catalyst, ionic liquid has attracted much attention due to its low vapor pressure, good solubility, thermal stability and chemical stability (J.F.Brennecke, AIChE J., 2001, 47: 2384-2389). Due to its unique properties, it has gradually replaced traditional volatile organic solvents in recent years and has been used in the fields of organic synthesis, separation and purification, and catalytic chemistry (M.H.Valkenberg, Appl.Catal.A: General, 2001, 215, 185-190) . Ionic liquids provide an environment different from traditional molecular solvents for chemical reactions, and can change the reaction mechanism to make the catalytic activity better. Due to the low vapor pressure and wide liquid temperature range of i...

AI Technical Summary

Problems solved by technology

However, there has not been any report on the application of solid-supported ionic liquid Cu salt catalyst system in the oxidative carbonylation of methanol

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