Layered multi-metal molybdenum sulfide catalyst and preparation method

Abstract

The invention relates to a layered multi-metal molybdenum sulfide catalyst and a preparation method. The catalyst is represented by a formula M1M2-Mo-S, M1 represents <+2>-valence metal of one of Ni, Co, Mg or Mn, and M1 represents <+3>-valence metals of one or two of Fe, Al or Ce. The catalyst uses a M1M2 oxide form as a calculating base, Mo represents a vulcanized state, and the Mo element content is 1%-50%. Soluble salt of the M1 and soluble salt of the M2 are dissolved in ionized water to form a corresponding metal salt solution; then alkali and an alkali precipitant are prepared into a solution, and coprecipitation is performed to obtain a hydrotalcite compound; calcination is performed in a muffle furnace to obtain metallic oxides of corresponding elements; soluble Mo acid radical anion salt is dissolved in water, the metallic oxides are added to obtain the hydrotalcite compound intercalated with Mo acid radical anions, and then the catalyst is obtained through vulcanization. The preparation method is simple, easy to operate and high in repeatability and can be applied to industrial production.

Description

technical field [0001] The invention belongs to the technical field of industrial catalysis and bioenergy conversion, and relates to the preparation of polymetallic sulfide catalysts, in particular to a layered polymetallic molybdenum sulfide catalyst and a preparation method. Background technique [0002] In recent years, unsupported polymetallic sulfide catalysts have attracted more and more attention in the field of hydrogenation catalysis, especially in the deep desulfurization of oil products. Transition metal sulfides are typical two-dimensional layered materials, whose edge sites provide abundant active sites for catalytic processes and have strong catalytic effects. The non-supported polymetallic sulfide catalyst does not need a carrier and has a high content of active components, which has higher hydrogenation activity and can meet the society's requirements for oil cleanliness. [0003] The currently used synthesis methods of non-supported sulfide catalysts includ...

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Problems solved by technology

Compared with the single Mo or single W precursor synthesis catalyst, the multimetal catalyst prepared by this method has obvious structural changes; however, ammonia water is used in the synthesis process of this method, which will pollute the environment

[0006] From the work reported now, it is not difficult to find that existing non-supported metal sulfide catalysts also have shortcomings such as: 1) about removing Ni, Co, such as other metals such as Al, Fe, Ce, Mn on the catalyst There is very little work related to the impact; 2) The raw materials used pollute the environment; 3) The specific surface, pore volume and activity of the catalyst still need to be improved

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