METHOD OF PRODUCING STYRENE Russian patent published in 2020 - IPC C07C1/24 C07C15/46 C07C7/05 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing styrene or substituted styrenes, comprising steps of: (a) providing dehydration of feedstock containing 1-phenylethanol or substituted 1-phenylethanol, in the presence of a suitable dehydration catalyst; (b) providing separation treatment of the obtained mixture of products, thereby obtaining a stream containing water and styrene or substituted styrene, and a residual fraction containing heavy epoxy; (c) treating a stream containing water and styrene or substituted styrene with a base; (d) separating the stream treated at step (c) into a styrene-rich or substituted styrene-rich product stream and a waste water stream depleted of styrene or a substituted styrene; (e) treating a stream of waste water depleted of styrene or substituted styrene with steam in a stripping column, thereby obtaining a treated effluent stream and treated stream containing steam and styrene or substituted styrene.

EFFECT: use of the disclosed method enables to obtain styrene with maximum output and, at the same time, a reduced amount of contamination of the heat exchanger.

10 cl, 1 dwg, 1 ex, 1 tbl