Patent ID: 11890589
Assignee: CHINA PETROLEUM & CHEMICAL CORPORATION
Field: Chemical engineering (Chemistry)
Classification: CPC B  C  Y | IPC B  C

Claim 16:
17. The reaction process according to claim 15, wherein:
a reaction effluent obtained from an outlet of the nth reactor is depressurized to 0.005-0.18 MPa by a coalescing internal member in a self-vaporization separator, so that a part of C4 alkanes in the reaction effluent is vaporized,
gas phase components from the reaction effluent are separated, compressed and refrigerated to obtain an isobutane refrigerant, the remainder of the reaction effluent is separated into an acid phase and a hydrocarbon phase in a lower part of the self-vaporization separator, and the acid phase is recycled back to the x reaction zone of the first reactor, a majority of the hydrocarbon phase is sent to a raw material mixer, and a minority of the hydrocarbon phase is sent to an optional precision coalescer to further remove acid and acid esters in the hydrocarbon phase;
wherein isobutane in the hydrocarbon phase of the reaction effluent is removed in a deisobutanizer, and the recycled isobutane, normal butane and an alkylation product are obtained from a top of the deisobutanizer, a middle upper part of the deisobutanizer, and a bottom of the deisobutanizer, respectively.