Patent ID: 8702910
Filing Date: 2014-04-22
Classification: C10G

Abstract:
1. A system for producing a fuel stream containing a low concentration of undesirable compounds from a primary fuel stream, the system comprising: a first separation stage to separate a portion of a primary fuel stream into a first vapor permeate stream and a first retentate stream; a first separation stage partial condenser connected to the first vapor permeate stream condensing a portion of the first vapor permeate stream into a first liquid stage stream and a first vapor stage stream; a second separation stage partial condenser condensing a portion of the first vapor stage stream into a second liquid stage; a second separation stage for separating the second liquid stage stream into a second vapor permeate stream and a second retentate stream; and a mixer to mix the first retentate stream and the second vapor permeate stream and returning the mixture to the primary fuel stream.