Naphtha hydrofining process

Claim 2

A process for hydrofining an olefinic naphtha hydrocarbon feed which comprises contacting said feed in vapor phase, and hydrogen, with a fixed bed of particulate catalyst comprised of a composite of a Group VIB or Group VIII metal, or both, and an inorganic oxide support, of average size below about 1/20 inch diameter at pressure ranging from about 60 psig to about 300 psig.

Claim 3

The process of claim 1 wherein the feed is comprised of a cat cracked or thermally cracked naphtha of olefin content ranging from about 10 percent to about 60 percent, based on the weight of said feed.

Claim 4

The process of claim 2 wherein the olefin content ranges from about 20 percent to about 40 percent.

Claim 5

The process of claim 1 wherein the feed boils from about C 5 /430° F.

Claim 6

The process of claim 1 wherein the feed has a low end boiling point ranging from about 160° F to about 220° F and a high end boiling point ranging from about 270° F to about 350° F.

Claim 7

The process of claim 5 wherein the major process variables employed in processing said feed are substantially as follows: ______________________________________ Pressure, psig 60-500 Temperature, ° F 400-800 Feed Rate, LHSV 1-80 Hydrogen Rate, SCF/Bbl 200-4000 ______________________________________

Claim 8

The process of claim 5 wherein the major process variables employed in processing said feed are substantially as follows: ______________________________________ Pressure, psig 80-200 Temperature, ° F 500-600 Feed Rate, LHSV 2-10 Hydrogen Rate, SCF/Bbl 800-2000 ______________________________________

Claim 9

The process of claim 5 wherein the low end boiling point ranges from about 180° F to about 200° F and the high end boiling point ranges from about 290° F to about 330° F.

Claim 10

The process of claim 8 wherein the major process variables employed in processing said feed are substantially as follows: ______________________________________ Pressure, psig 60-500 Temperature, ° F 400-800 Feed Rate, LHSV 1-80 Hydrogen Rate, SCF/Bbl 200-4000 ______________________________________

Claim 11

The process of claim 8 wherein the major process variables employed in processing said feed are substantially as follows: ______________________________________ Pressure, psig 80-200 Temperature, ° F 500-600 Feed Rate, LHSV 2-10 Hydrogen Rate, SCF/Bbl 800-2000 ______________________________________

Claim 12

The process of claim 1 wherein the olefinic naphtha hydrocarbon feed is split into three fractions, a low boiling fraction having an initial boiling point ranging from about 65° F to about 120° F and an upper boiling point ranging from about 160° F to about 220° F, an intermediate boiling fraction having an initial boiling point ranging from about 160° F to about 220° F and an upper boiling point ranging from about 270° F to about 350° F, and a high boiling fraction having an initial boiling point ranging from about 270° F to about 350° F and an upper boiling point ranging from about 300° F to about 430° F, wherein the intermediate boiling fraction is hydrofined at the following conditions ______________________________________ Pressure, psig 60-500 Temperature, ° F 400-800 Feed Rate, LHSV 1-80 Hydrogen Rate, SCF/Bbl 200-4000 ______________________________________ and the higher boiling fraction is hydrofined at the following conditions ______________________________________ Pressure, psig 80-2000 Temperature, ° F 400-800 Feed Rate, LHSV 0.2-20 Hydrogen Rate, SCF/Bbl 200-2000 ______________________________________

Claim 13

The process of claim 11 wherein the low boiling fraction is hydrofined at the following conditions ______________________________________ Pressure, psig 60-500 Temperature, ° F 400-800 Feed Rate, LHSV 1-80 Hydrogen Rate, SCF/Bbl 200-4000 ______________________________________

Claim 14

The process of claim 11 wherein the low boiling fraction is hydrofined at the following conditions ______________________________________ Pressure, psig 80-200 Temperature, ° F 500-600 Feed Rate, LHSV 5-20 Hydrogen Rate, SCF/Bbl 800-2000 ______________________________________ the intermediate fraction is hydrofined at the following conditions ______________________________________ Pressure, psig 80-200 Temperature, ° F 500-600 Feed Rate, LHSV 2-10 Hydrogen Rate, SCF/Bbl 800-2000 ______________________________________ and the high boiling fraction is hydrofined at the following conditions ______________________________________ Pressure, psig 200-500 Temperature, ° F 550-650 Feed Rate, LHSV 1-5 Hydrogen Rate, SCF/Bbl 800-2000 ______________________________________

Claim 15

The process of claim 1 wherein the catalyst is comprised of a composite of an admixture of Group VIB and Group VIII metals with alumina.

Claim 16

The process of claim 14 wherein the catalyst is comprised of cobalt molybdate or nickel molybdate on alumina.

Claim 17

The process of claim 1 wherein the particle size of the catalyst ranges from about 200 microns to about 1/20 inch.

Claim 18

The process of claim 1 wherein the particle size of the catalyst ranges from about 1/40 inch to about 1/20 inch.

Claim 19

A process for hydrofining an olefinic naphtha hydrocarbon feed which comprises feed which comprises splitting said feed into three fractions, a low boiling fraction having an initial boiling point ranging from about 65° F to about 120° F and an upper boiling point ranging from about 160° F to about 220° F, an intermediate boiling fraction having an initial boiling point ranging from about 160° F to about 220° F and an upper boiling point ranging from about 270° F to about 350° F, and a high boiling fraction having an initial boiling point ranging from about 270° F to about 350° F and an upper boiling point ranging from about 300° F to about 430° F, contacting said feed having a low end boiling point ranging from about 160° F to about 220° F and a high end boiling point ranging from about 270° F to about 350° F in vapor phase, and hydrogen, with a fixed bed of particulate catalyst comprised of a composite of cobalt molybdate or nickel molybdate on alumina, of average size below about 1/20 inch diameter, at process conditions defined substantially as follows: ______________________________________ Pressure, psig 60-500 Temperature, ° F 400-800 Feed Rate, LHSV 1-80 Hydrogen Rate, SCF/Bbl 200-4000 ______________________________________

Claim 20

A process for hydrofining an olefinic naphtha hydrocarbon feed which comprises feed which comprises splitting said feed into three fractions, a low boiling fraction having an initial boiling point ranging from about 65° F to about 120° F and an upper boiling point ranging from about 160° F to about 220° F, an intermediate boiling fraction having an initial boiling point ranging from about 160° F to about 220° F and an upper boiling point ranging from about 270° F to about 350° F, and a high boiling fraction having an initial boiling point ranging from about 270° F to about 350° F and an upper boiling point ranging from about 300° F to about 430° F, contacting said feed having a low end boiling point ranging from about 160° F to about 220° F and a high end boiling point ranging from about 270° F to about 350° F in vapor phase, and hydrogen, with a fixed bed of particulate catalyst comprised of a composite of cobalt molybdate or nickel molybdate on alumina, of average size below about 1/20 inch diameter, at process conditions defined substantially as follows: ______________________________________ Pressure, psig 60-500 Temperature, ° F 400-800 Feed Rate, LHSV 1-80 Hydrogen Rate, SCF/Bbl 200-4000 ______________________________________

Claim 21

The process of claim 18 wherein the olefinic naphtha hydrocarbon feed is split into three fractions, a low boiling fraction having an initial boiling point ranging from about 65° F to about 120° F and an upper boiling point ranging from about 160° F to about 220° F, an intermediate boiling fraction having an initial boiling point ranging from about 160° F to about 220° F and an upper boiling point ranging from about 270° F to about 350° F, and a high boiling fraction having an initial boiling point ranging from about 270° F to about 350° F and an upper boiling point ranging from about 300° F to about 430° F, wherein the low boiling fraction is hydrofined at the following conditions: ______________________________________ Pressure, psig 60-500 Temperature, ° F 400-800 Feed Rate, LHSV 1-80 Hydrogen Rate, SCF/Bbl 200-4000 ______________________________________ wherein the intermediate boiling fraction is hydrofined at the following conditions: ______________________________________ Pressure, psig 60-500 Temperature, ° F 400-800 Feed Rate, LHSV 1-80 Hydrogen Rate, SCF/Bbl 200-4000 ______________________________________ and the higher boiling fraction is hydrofined at the following conditions: ______________________________________ Pressure, psig 80-2000 Temperature, ° F 400-800 Feed Rate, LHSV 0.2-20 Hydrogen Rate, SCF/Bbl 200-2000 ______________________________________