Continuous process for converting natural gas to liquid hydrocarbons
View Patent ↗A method comprising: providing a halogen stream; providing an alkane stream; providing a decoking agent; and reacting at least a portion of the halogen stream with at least a portion of the alkane stream in the presence of a halogenation catalyst and the decoking agent to form a halogenated stream.
1. A method comprising:
providing an alkyl halide stream comprising alkyl halides;
contacting at least some of the alkyl halides with a coupling catalyst to form a product stream comprising at least some higher hydrocarbons and hydrogen halide;
separating the hydrogen halide from the product stream using temperature swing absorption;
reacting the hydrogen halide with a source of oxygen in the presence of an oxidation catalyst to generate a corresponding halogen;
providing an aqueous hydrogen halide stream;
providing an absorption vessel;
providing a separation vessel;
contacting the product stream with the aqueous hydrogen halide stream in the absorption vessel to absorb at least some of the hydrogen halide in the product stream in the aqueous hydro en halide stream;
transferring the aqueous hydrogen halide stream containing at least some of the hydrogen halide to the separation vessel, wherein at least a portion of the hydrogen halide in the aqueous hydrogen halide stream is removed through heating; and
recycling the aqueous hydrogen halide stream directly to the absorption vessel.
2. The method of claim 1 wherein the aqueous hydrogen halide stream entering the absorption vessel has a hydrogen halide concentration of at least about 48% by weight of the aqueous hydrogen halide stream.
3. The method of claim 1 wherein the aqueous hydrogen halide stream exiting the absorption vessel has a hydrogen halide concentration from about 50% to about 80% by weight of the aqueous hydrogen halide stream.
4. The method of claim 1 wherein the aqueous hydrogen halide stream is heated in the separation vessel to greater than about 125° C.