Process for converting gaseous alkanes to liquid hydrocarbons

摘要

Embodiments disclose a process for converting gaseous alkanes to higher molecular weight hydrocarbons, olefins or mixtures thereofs wherein a gaseous feed containing alkanes may be reacted with a dry bromine vapor to form alkyl bromides and hydrobromic acid vapor. The mixture of alkyl bromides and hydrobromic acid then may be reacted over a synthetic crystalline alumino-silicate catalyst, such as a ZSM-5 or an X or Y type zeolite, at a temperature of from about 250° C. to about 500° C. so as to form hydrobromic acid vapor and higher molecular weight hydrocarbons, olefins or mixtures thereof. Various methods are disclosed to remove the hydrobromic acid vapor from the higher molecular weight hydrocarbons, olefins or mixtures thereof and to generate bromine from the hydrobromic acid for use in the process.

主权项

1. A process comprising:
separating hydrobromic acid from a gaseous stream comprising hydrobromic acid and hydrocarbons; converting said hydrobromic acid to at least bromine; contacting said bromine with gaseous alkanes, in a first reactor, to form bromination products comprising alkyl bromides; reacting said alkyl bromides in a second reactor to convert at least a portion of said alkyl bromides to synthesis products comprising hydrocarbon products and additional hydrobromic acid, wherein the hydrocarbon products comprise hydrocarbons selected from the group consisting of olefins, C5+ hydrocarbons, and combinations thereof; withdrawing effluent from the second reactor comprising the hydrocarbon products and additional hydrobromic acid; and converting the additional hydrobromic acid in the effluent withdrawn from the second reactor to at least bromine.