Preparation method of dimethyl sulfone as well as used catalyst and catalyst composition thereof

Abstract

The invention belongs to the field of organic synthetic chemistry, and in particular relates to a preparation method of dimethyl sulfone as well as used catalyst and catalyst composition thereof. The general formula of the catalyst is aFe2O3.bMnO2.cTiO2.dRh203.eRuO2, wherein a, b and c are selected from 0 to 15 independently, and d and e are selected from 0.01 to 10 independently. The catalyst composition comprises the catalyst and photosensitizer with the mass ratio of 1:0.01 to 10. The catalyst / catalyst composition has efficient catalytic activity, oxygen is taken as single oxidant during a process of catalyzing dimethylsulfide or dimethyl sulfoxide to prepare dimethyl sulfone, and compared with a conventional nitric acid technique and a potassium permanganate method, the preparation method has the advantages that during preparation, any hazardous substances can not be caused, and pollution is not caused to the environment.

Description

technical field [0001] The invention belongs to the field of organic synthetic chemistry, and more specifically relates to a preparation method of dimethyl sulfone, a catalyst used therein and a catalyst composition. Background technique [0002] Dimethyl sulfone, also known as Methyl Sulfonyl Methane (MSM), is an organic sulfide, which is a necessary substance for the synthesis of collagen in the human body. Once it is deficient, it will cause health disorders or diseases. At the same time, it is industrially used as a high-temperature solvent and raw material for organic synthesis, as a stationary liquid for gas chromatography, as an analytical reagent, as a food additive and as a drug. The synthesis of dimethyl sulfone is from the oxidation of dimethyl sulfide or dimethyl sulfoxide. [0003] According to research reports, there are mainly several production methods for dimethyl sulfone: 1. Synthesize with nitric acid as the oxidant and dimethyl sulfoxide as the main raw ...

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Problems solved by technology

The yield of this process is low, the waste gas and waste water are more, and the product is not easy to be refined

In addition, CN1397533A uses a transition metal complex catalyst to prepare dimethyl sulfone with only air as an oxidant, but needs to add isovaleraldehyde, which greatly increases the production cost

Also CN102527408A uses a self-made multi-metal catalyst, which can effectively catalyze dimethyl sulfide to prepare dimethyl sulfone under mild conditions, but the catalyst uses a large amount

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