PROCESS AND SYSTEM FOR RECOVERING COMPONENTS FROM ALKYL BROMIDE SYNTHESIS

摘要

A process and system for recovering hydrogen bromide, methane, ethane and propane from butane and higher hydrocarbon products by means of condensation, cryogenic liquefaction and distillation, and for oxidation of the hydrogen bromide to bromine for re-use within a gas-conversion process for producing higher-molecular weight hydrocarbons.

主权项

1. A process comprising:
reacting a first quantity of bromine with lower molecular weight alkanes to form first bromination products comprising alkyl bromides; reacting at least a portion of said alkyl bromides in the presence of a catalyst to form an effluent containing unreacted lower molecular weight alkanes, hydrogen bromide and a C4+ hydrocarbon product comprising olefins, aromatics, higher molecular weight hydrocarbons, or mixtures thereof; separating at least a portion of the C4+ hydrocarbon product from the effluent by cooling said effluent to condense said at least a portion of the C4+ hydrocarbon product; cryogenic cooling the effluent from which said at least a portion of the C4+ hydrocarbon product has been separated to condense and separate C2, HBr, C3 and the remaining C4+ hydrocarbon product thereby resulting in a C1 residual vapor stream; and fractionating the separated C2, HBr, C3 and the remaining C4+ hydrocarbon product from which said C1 has been removed into a first stream containing predominately C2, a second stream containing predominately HBr, and a third stream containing predominately C3 and C4+.