Preparation process of dimethyl carbonate and catalyst thereof

Abstract

The invention discloses a preparation process of dimethyl carbonate and a catalyst thereof. The preparation process comprises the following steps: (1) drying sulfuric acid residues, grinding, carrying out acid leaching treatment, and carrying out solid-liquid separation to obtain pretreated sulfuric acid residues; (2) carrying out acid leaching treatment on the pretreated sulfuric acid residues again, and cleaning and drying solid residues obtained by solid-liquid separation; (3) adding excessive precipitant into the liquid phase obtained by solid-liquid separation to enable the iron element in the liquid phase to form precipitate, separating out the precipitate, and washing for later use; (4) uniformly mixing the precipitate with solid slag, calcium carbonate and water, granulating, and calcining the obtained particles in an air atmosphere to obtain a catalyst precursor; and (5) soaking the catalyst precursor in clear water, drying to obtain the catalyst, and catalyzing carbon dioxide and methanol to synthesize dimethyl carbonate by using the catalyst. According to the process, the catalyst prepared from industrial waste residues is used for catalyzing carbon dioxide and methanol to synthesize dimethyl carbonate, the conversion rate of methanol is increased, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of dimethyl carbonate preparation, in particular to a preparation process of dimethyl carbonate and a catalyst thereof. Background technique [0002] As we all know, dimethyl carbonate is a chemical raw material with low toxicity, excellent environmental performance and wide application. It contains CH 3 -, CH 3 O-, CH 3 A variety of functional groups such as O-CO-, -CO-, are widely used as intermediates in organic synthesis, and are known as the "new cornerstone" of organic synthesis today. Dimethyl carbonate can be used as a raw material to prepare a variety of high value-added products. Fine specialty chemicals, such as pharmaceuticals, pesticides, synthetic materials, lubricating oil additives, etc. The earliest method of dimethyl carbonate is the phosgene method. Since the raw materials used in it are highly toxic, almost no enterprises have adopted this method to prepare dimethyl carbonate. The cur...

AI Technical Summary

Problems solved by technology

However, this method needs the assistance of a catalyst to carry out, and it is still in the laboratory test stage

In addition, the preparation cost of this type of catalyst is high, and the conversion rate of the catalyst to methanol is not ideal

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