Preparation method of copper silicon catalyst for hydrogenation of dimethyl oxalate to ethylene glycol

Abstract

The invention discloses a preparation method of a copper-silicon catalyst used for hydrogenation of dimethyl oxalate to ethylene glycol, relating to the copper-silicon catalyst. Add silica sol to water to obtain silica sol dispersion; dissolve copper salt in deionized water, add ammonia water to form copper ammonium ion solution, and then add ammonium chloride to obtain copper ammonium ion mixed solution; add silica sol dispersion to copper A mixed solution of ammonium ions to obtain a mixed solution of silica sol and copper ammonium ions, then transferred to a closed container, placed in a constant temperature environment, to obtain a blue precipitate, washed and dried to obtain a blue powder, and then dispersed in water, Obtain the dispersion of the mesoporous copper-silicon catalyst precursor after ultrasonication; then place it in a water bath, add L-arginine and cationic surfactant to the dispersion, and then add ethyl orthosilicate to obtain a light blue precipitate; After washing and drying, a light blue powder is obtained. After heat treatment, the cationic surfactant is removed from the light blue powder to obtain a copper-silicon catalyst for hydrogenation of dimethyl oxalate to ethylene glycol.

Description

Technical field [0001] The invention relates to a copper-silicon catalyst, in particular to a method for preparing a copper-silicon catalyst for hydrogenating dimethyl oxalate to prepare ethylene glycol. Background technique [0002] As a widely used chemical product, ethylene glycol has been applied in polyester industry, energy, fine chemicals, textiles, and automobile manufacturing. In recent years, with the development of my country's national economy, the market demand for ethylene glycol has grown rapidly. my country has become the world's number one consumer, accounting for more than 30% of the world's total ethylene glycol consumption. At the same time, the contradiction between the rapid growth of my country's demand for ethylene glycol and the relatively insufficient production capacity has become increasingly fierce. According to incomplete statistics, my country's ethylene glycol demand in 2012 is expected to be around 9.5 million tons, but domestic production is abo...

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Problems solved by technology

However, the existing copper-silicon catalysts are difficult to produce copper phyllosilicate species and monovalent copper (Yin, A.Y., X.Y. Guo, et al. Applied Catalysis a-General 2008,349(1-2):91-99.)

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