PROCESS FOR THE SEPARATION OF THE FLOW LEAVING THE REACTION ZONE FOR THE ALKYLATION OF AROMATIC HYDROCARBONS BY MEANS OF OLEFINES

摘要

1292996 Separating oligomerization or alkylation effluents UNIVERSAL OIL PRODUCTS CO 17 March 1970 [24 March 1969] 12734/70 Heading C5E A process for separating a reaction zone effluent comprising at least 3 components (A, B and C) comprises (i) separating the effluent in a first separation zone into a first fraction comprising vapour A and a second fraction comprising B and C; (ii) absorbing A in a lean absorbent and passing the rich absorbent from the absorption zone to the reaction zone; (iii) separating the second fraction in a second separation zone into a third fraction comprising B and a fourth fraction comprising C; and (iv) passing at least part of B to (ii) as lean absorbent. The process is particularly applied to an olefin oligomerization process where A is the vaporous diluent (e.g. propane), B is partially oligomerized product and C is olefin oligomer (e.g. propylene trimer or tetramer). The process may also be applied to an olefin-aromatic alkylation where A is the vaporous diluent (e.g. ethane or propane), B is alkylable aromatic (e.g. benzene) and C is the alkylated product (e.g. ethylbenzene or cumene).