Process for enhanced benzene-synthetic natural gas production from gas condensate
AssigneeAir Products and Chemicals, Inc.
InventorsJoseph Klosek, John C. Tao
Life of this patent
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Abstract
An upgraded benzene-synthetic natural gas product is produced from hydrocarbon gas condensate feedstock by catalytically reforming a C.sub.6 -300.degree. F. B.P. fraction and hydrogasifying the remainder of the feedstock. The overall efficiency of the process is enhanced by dealkylation of certain intermediate streams in the process and by recycling certain other aromatic and hydrogen-rich streams within the process.
Claims14
Method for converting a hydrocarbon gas condensate feedstock into a substantially benzene product and a synthetic natural gas product comprising:
- (a) separating said feedstock into three fractions:
- (i) C.sub.5 and lighter.
- (ii) C.sub.6 to 300.degree. F. B.P.
- (iii) B.P. above 300.degree. F.;
- (b) catalytically reforming said fraction (ii) to produce a by-product gas stream and a benzene product;
- and
- (c) hydrogasifying said fractions (i) and (iii) with the gas stream from the reforming in step (b) to produce synthetic natural gas and additional benzene product.
A method for converting a hydrocarbon gas condensate feedstock into a substantially pure benzene product and a synthetic natural gas product comprising the steps of:
- (a) initially separating the hydrocarbon gas condensate feedstock into a C.sub.5 and lighter stream and a C.sub.6 and heavier stream;
- (b) separating the C.sub.6 and heavier stream into a C.sub.6 to 300.degree. F. B.P. stream and a 300.degree. F.+B.P. stream;
- (c) reforming said C.sub.6 to 300.degree. F. stream to produce by-product gas and a benzene-rich reformate stream;
- (d) splitting the reformate stream into a benzene overhead stream and a toluene and xylene containing bottom stream;
- (e) solvent extracting the benzene overhead stream to produce an essentially pure benzene product and a raffinate stream containing paraffinic hydrocarbons;
- (f) processing the C.sub.5 and lighter stream of step (a), the 300.degree. F.+ stream of step (b), the by-product gas of step (c), and the raffinate stream of step (e) in a hydrogasification reactor to produce a light methane, ethane and benzene stream and a heavy aromatics stream;
- (g) scrubbing the light methane, ethane and benzene stream with oil to remove a light aromatic benzene product stream;
- (h) hydrodealkylating the toluene and xylene bottom stream of step (d) and the heavy aromatics stream of step (f) to produce a benzene product;
- (i) cryogenically separating the light methane and ethane stream of step (g) to produce a synthetic natural gas and an ethane stream.
Dependencies are inferred from the claim text.