Acetaldehyde → Ethylene

Participants

Reaction Steps

The heating medium of the present invention may be prepared according to various methods. For example, benzene and styrene or benzene and acetaldehyde are allowed to react at a comparatively low temperature, using as a catalyst hydrogen chloride, aluminum chloride or concentrated sulfuric acid, followed by neutralization, and the reaction mixture is separated by fractional distillation to obtain the product. However, the practically suitable method for producing the heating medium of the present invention comprises rectifying oily substances by-produced as by-products in the production of ethyl benzene from the reaction between benzene and ethylene, e.g., oily substances obtained as the tower bottom liquid in a distillation tower of polyalkyl benzene, and recovering portions containing 1,1-diphenyl ethane, for example, fractions at 75° to 90° C./1 mm. Hg.

Provenance & Evidence