Method for transforming dimethyl oxalate into ethylene glycol by one-pot process under hydrogen-free condition

A technology of dimethyl oxalate and ethylene glycol, which is applied in chemical instruments and methods, preparation of organic compounds, metal/metal oxide/metal hydroxide catalysts, etc. The activation of source hydrogen, the cumbersome preparation process, etc., can reduce the investment in equipment and hydrogen transportation, enhance the activity and stability, and enhance the ability to absorb and dissociate H.
CN109232185AActive Publication Date: 2019-01-18EAST CHINA NORMAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
EAST CHINA NORMAL UNIVERSITY
Publication Date
2019-01-18

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Abstract

The invention provides a method for transforming dimethyl oxalate into ethylene glycol by a one-pot process under a hydrogen-free condition. The method comprises the following steps: (1) preparing a Cu-based catalyst, wherein the Cu-based catalyst comprises a reactive metal Cu and a carrier, a second metallic element is introduced into the Cu-based catalyst, the auxiliary metallic elements refer to alkali metal or / and alkaline-earth metal elements; the reactive metal Cu comprises Cu<+> and Cu0, and oxygen vacancy is enriched on the surface of the Cu-based catalyst; (2) weighing dimethyl oxalate, the Cu-based catalyst and a hydrogen-donor solvent, sequentially adding into a micro high-pressure reactor, filling N2, and reacting under the condition of 180-300 DEG C for 0.5-10 hours, thereby obtaining the ethylene glycol. According to the method disclosed by the invention, alcoholic hydrogen production and dimethyl oxalate hydrogenation reaction can be successfully coupled in the one-stepprocess, supply of exogenous hydrogen is not needed, equipment for performing hydrogenation conversion on the dimethyl oxalate to obtain ethylene glycol in the traditional process and hydrogen transport input can be greatly reduced, and the potential safety hazards in the production process are reduced.
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Description

technical field

[0001] The invention relates to the field of ethylene glycol preparation, in particular to a method for converting dimethyl oxalate into ethylene glycol in one pot without hydrogen. Background technique

[0002] Ethylene glycol is an important chemical product and basic organic raw material, widely used in the production of polyester, antifreeze, plasticizer, synthetic fiber, pesticide intermediates, pharmaceutical intermediates and advanced organic solvents and other fields. The demand for ethylene glycol in the world is showing a steady growth trend, so ethylene glycol has broad development prospects and application markets. At present, the production methods of ethylene glycol are mainly divided into two types: petroleum route and non-petroleum route. The petroleum route refers to the preparation of ethylene by cracking naphtha, and then ethylene glycol is produced by oxidative hydrolysis of ethylene, that is, the hydration of ethylene oxide to ethylene g...

Claims

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