Process for converting gaseous alkanes to liquid hydrocarbons
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United States of America Patent
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Sep 11, 2007
Grant Date -
Oct 20, 2005
app pub date -
Apr 8, 2005
filing date -
Apr 8, 2005
priority date (Note) -
Withdrawn
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Abstract
A process for converting gaseous alkanes to liquid hydrocarbons wherein a gaseous feed containing alkanes is reacted with a dry bromine vapor to form alkyl bromides and hydrobromic acid vapor. The mixture of alkyl bromides and hydrobromic acid are then reacted over a synthetic crystalline alumino-silicate catalyst, such as a ZSM-5 zeolite, at a temperature of from about 150.degree. C. to about 450.degree. C. so as to form higher molecular weight hydrocarbons and hydrobromic acid vapor. Propane and butane which comprise a portion of the products may be recovered or recycled back through the process to form additional C.sub.5+ hydrocarbons. Various methods are disclosed to remove the hydrobromic acid vapor from the higher molecular weight hydrocarbons and to generate bromine from the hydrobromic acid for use in the process.
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