2 results about "Benzene synthesis" patented technology

The application provides a method for preparing isobutylbenzene from benzene and butene, which comprises four reactions in sequence; the first reaction is to synthesize sec-butylbenzene from benzene and butene; the second reaction is to generate 2-phenyl-2-butene by dehydrogenation of sec-butylbenzene; the third reaction is to generate 2-methyl-1-phenylpropene by isomerization of 2-phenyl-2-butene; and the fourth reaction is to generate isobutylbenzene by hydrogenation of 2-methyl-1-phenylpropene; the butene comprises 1-butene and / or 2-butene. The method uses benzene and butene as raw materials, adopts a four-step continuous series fixed-bed reaction process to synthesize isobutylbenzene, is simple to operate, can realize continuous production, does not need to use the metal potassium-sodium catalyst used in the traditional isobutylbenzene synthesis process, has small safety risk, and is suitable for industrialized production of isobutylbenzene.

This invention discloses a complete process for preparing nitrobenzene using a microchannel reactor, belonging to the field of nitrobenzene synthesis. The complete process includes mixed acid, microchannel nitration reaction, intermediate product cooling and stratification followed by water and alkali washing, crude product distillation, waste acid recovery, and wastewater treatment. Compared with existing nitrobenzene synthesis technologies, this invention has high mass transfer efficiency, significantly shortens the nitration reaction time, greatly improves production efficiency, enhances reaction safety, and simultaneously achieves waste acid recovery and wastewater treatment, ensuring safe, environmentally friendly, and stable production.