Production of alkylate

Claim 2

The method of preparing a product stream containing alkylate gasoline from a charge stream containing paraffinic components as claimed in claim 1 wherein said charge stream is a raffinate stream from which aromatics have been extracted.

Claim 3

The method of preparing a product stream containing alkylate gasoline from a charge stream containing paraffinic components as claimed in claim 1 wherein said charge stream contains at least about 60 percent paraffins.

Claim 4

The method of preparing a product stream containing alkylate gasoline from a charge stream containing paraffinic components as claimed in claim 1 wherein said isomerizing-cracking catalyst is an activated alumina.

Claim 5

The method of preparing a product stream containing alkylate gasoline from a charge stream containing paraffinic components as claimed in claim 1 wherein said isomerizing-cracking catalyst includes platinum, palladium, rhodium, or ruthenium on an alumina which has been activated by (a) chlorine or bromine and (b) hydrogen sulfide or Sm X2 wherein m is 1-2 and X is chlorine or bromine at activation temperature of 350*F-750*F.

Claim 6

The method of preparing a product stream containing alkylate gasoline from a charge stream containing paraffinic components as claimed in claim 1 wherein hydrogen is separated from said isomerized-cracked stream prior to further processing.

Claim 7

The method of preparing a product stream containing alkylate gasoline from a charge stream containing paraffinic components as claimed in claim 1 wherein, in said separating operation, said isomerized-cracked stream is separated into (a) a light paraffin stream, (b) an isobutane-containing stream and (c) a heavy paraffin stream.

Claim 8

The method of preparing a product stream containing alkylate gasoline from a charge stream containing paraffinic components as claimed in claim 8 wherein said light paraffin stream and said heavy paraffin stream are combined and passed to said thermal cracking operation.

Claim 9

The method of preparing a product stream containing alkylate gasoline from a charge stream containing paraffinic components as claimed in claim 1 wherein the effluent stream from thermal cracking is fractionally distilled to separate at least a C4 olefin fraction and a thermal naphtha fraction.

Claim 10

The method of preparing a product stream containing alkylate gasoline from a charge stream containing paraffinic components as claimed in claim 10 wherein the thermal naphtha fraction is hydrogenated to yield a gasoline cut.

Claim 11

The method of preparing a product stream containing alkylate gasoline from a charge stream containing paraffinic components as claimed in claim 11 wherein said hydrogenated thermal naphtha is added to said alkylate gasoline fraction.

Claim 12

The method of preparing a product stream containing alkylate gasoline from a charge stream containing paraffinic components as claimed in claim 1 which comprises passing said charge stream into contact with an isomerizing-cracking catalyst at isomerizing-cracking conditions in the presence of hydrogen thereby forming an isomerized-cracked stream containing isobutane and light and heavy paraffins; separating said isomerized-cracked stream into (a) a light paraffin stream, (b) an isobutane-containing stream, and (c) a heavy paraffin stream; combining said light paraffin stream and said heavy paraffin stream thereby forming a deisobutanized isomerized-cracked stream; thermally cracking said deisobutanized isomerized-cracked stream thereby forming a thermally cracked product stream containing a C4 olefin fraction; alkylating said isobutane-containing stream with said product stream containing said C4 olefin fraction thereby producing an alkylate gasoline fraction; and recovering said alkylate gasoline fraction.

Claim 13

The method of preparing a product stream containing alkylate gasoline from a charge stream containing paraffinic components as claimed in claim 1 which comprises passing said charge stream into contact with an isomerizing-cracking catalyst at isomerizing-cracking conditions in the presence of hydrogen thereby forming an isomerized-cracked stream containing isobutane and light and heavy paraffins; separating said isomerized-cracked stream into (a) a light paraffin stream, (b) an isobutane-containing stream, and (c) a heavy paraffin stream; combining said light paraffin stream and said heavy paraffin stream thereby forming a deisobUtanized isomerized-cracked stream; thermally cracking said deisobutanized isomerized-cracked stream thereby forming a thermally cracked product stream containing a C4 olefin fraction; separating from said thermally cracked product stream (a) a light olefinic distillate fraction, (b) a thermal naphtha, and (c) a C4 olefin fraction; alkylating said isobutane-containing stream with said C4 olefin fraction thereby producing an alkylate gasoline fraction; and recovering said alkylate gasoline fraction.

Claim 14

The method of preparing a product stream containing alkylate gasoline from a charge stream containing paraffinic components as claimed in claim 14 wherein said thermal naphtha is hydrogenated thereby forming a hydrogenated thermal naphtha, and said hydrogenated thermal naphtha is passed to a gasoline pool.