Catalyst, its preparation method and its application in methanol and diol synthesis

Abstract

The invention provides a catalyst, a preparation method of the catalyst and application of the catalyst in synthesizing methyl alcohol and glycol. The catalyst is a complex with the general formula expressed by Ru(L)YY'Z, the ligand L is N-heterocyclic carbine, the ligand Y and the ligand y' are independently selected from first monodentate ligands with one negative charge respectively, the ligand Z is a second monodentate ligand, and the second monodentate ligand is electroneutral. Functional groups with good stability on water, oxygen and the like are selected as the ligands, thus the stability of the catalyst can be improved, and therefore the problem that an existing catalyst can only be used under severe conditions is solved. An isomerization product is easily formed by N-heterocyclic carbine, N-heterocyclic carbine is adopted as the ligand, and thus the activity and selectivity of the catalyst can be improved. The first monodentate ligands with one negative charge are selected, and thus the complex can be kept electroneutral. The second monodentate ligand is used for atomic coordination with central atom ruthenium to form a stable complex, and therefore the reaction rate can be increased.

Description

technical field

[0001] The invention relates to the field of organic synthesis, in particular to a catalyst, its preparation method and its application in methanol and diol synthesis. Background technique

[0002] Methanol is the simplest, safest, most easily stored and transported liquid hydrocarbon, and it is also considered to be an important platform compound to provide energy and chemicals for human beings in the post-petroleum era. At present, a variety of technologies for synthesizing "triene", "triphenyl" and oxygenates from methanol are developing rapidly. For example, Shenhua Group has successfully built a 600,000-ton / year MTO technology demonstration project. Now methanol investment is still in full swing. In the next 15 years, China's methanol production capacity will exceed 200 million tons, and the economic output value of methanol will reach about 1 trillion, accounting for about 7% of the entire petroleum and chemical industry output value. However, these pro...

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