PROCESSES AND SYSTEMS FOR RECOVERY OF RESIDUAL HALOGENATED HYDROCARBONS IN THE CONVERSION OF NATURAL GAS TO LIQUID HYDROCARBONS

摘要

Process and systems for converting lower molecular weight alkanes to higher molecular weight hydrocarbons that include recovery of residual halogenated hydrocarbons (e.g., CH3Br) from higher molecular weight hydrocarbon products. A process comprises reacting at least gaseous alkanes and a halogen to produce at least a halogenation product stream, wherein the halogenation product stream comprises alkyi halides, hydrogen halide, and unreacted alkanes. The process comprises reacting at least a portion of the alkyi halides from the halogenation product stream in the presence of a catalyst to produce at least a synthesis product stream, wherein the synthesis product stream comprises unreacted methyl halide, higher molecular weight hydrocarbons, and hydrogen halide. The process comprises separating the synthesis product stream into a first stream comprising hydrocarbons having five or more carbons, a second stream comprising unreacted methyl halide, and a third stream comprising hydrogen halide and hydrocarbons having one to four carbons.