Reactor for oxidation production of aromatic aldehyde by using methylbenzene substances

Abstract

The invention discloses a reactor for oxidation production of aromatic aldehyde by using methylbenzene substances. The reactor for oxidation production of aromatic aldehyde by using the methylbenzene substances comprises a main body, first baffle plates and second baffle plates, wherein an upper reaction cavity and a lower reaction cavity which are in communication are arranged in the main body; a feed opening and a circulating liquid outlet are formed in the wall of the lower reaction cavity, and an exhaust gas outlet and a discharge opening are formed in the wall of the upper reaction cavity; the main body is also provided with a circulating liquid inlet and an air inlet, wherein the circulating liquid inlet communicates with the circulating liquid outlet; the first baffle plates and the second baffle plates are alternately arranged in the upper reaction cavity in an up-and-down direction, the first baffle plates are annular, and the second baffle plates are circular; and the inner edges of the first baffle plates are located on the inner sides of the edges of the second baffle plates. The reactor for oxidation production of the aromatic aldehyde by using the methylbenzene substances disclosed by the invention has comprehensive characteristics of a complete mixing flow reaction and a piston flow reaction, has the advantages of being high in reaction efficiency, good in selectivity and the like, and can effectively restrain deep oxidation of aromatic aldehyde products.

Description

Technical field [0001] The present invention relates to the field of chemistry, in particular to a reactor for the oxidation of toluene substances to produce aromatic aldehydes. Background technique [0002] Aromatic aldehydes generally refer to compounds with aldehyde groups directly attached to the benzene ring. They are widely used in medicine, pesticides and other fields, and are important intermediates, raw materials for synthetic fragrances and food additives. Benzaldehyde is the simplest and most widely used aromatic aldehyde, and there are substituents on the benzene ring (such as -CH 3 , -OCH 3 , -NO 2 Etc.) The price of aromatic aldehydes is usually 1.5 times higher than that of benzaldehyde, and the economic efficiency of production is quite high. At present, due to the improvement of environmental protection requirements in China, many manufacturers of aromatic aldehydes with backward processes have been eliminated, so the demand for high-quality aromatic aldehydes ha...

AI Technical Summary

Problems solved by technology

This method produces a large amount of waste hydrochloric acid, causing serious environmental pollution. At the same time, the resulting product contains chlorine and is not suitable for food, medicine and other fields. Therefore, the chlorination hydrolysis method is being eliminated, and it is urgent to develop a green and efficient aromatic aldehyde production process to meet the domestic market. needs

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