Medium-pore zeolite olefinic naphtha by-product upgrading

Claim 2

An olefin interconversion process for upgrading a predominately C 5 - aliphatic feedstream to a primary product stream containing tertiary C 4 -C 5 olefins and for producing upgraded gasoline comprising the steps of: (a) contacting said predominately C 5 - aliphatic feedstream with a first zeolite catalyst having a Constraint Index of between about 1 and 12 under a first set of conversion conditions including pressure between about 240 and 2170 kPa, temperature between about 230° and 385° C. and weight hourly space velocity (WHSV) between about 0.1 and 250 hr -1 to form a primary product containing tertiary C 4 -C 5 olefins and a secondary gasoline boiling range stream; (b) separating said secondary gasoline boiling range stream from said primary product; and (c) contacting said secondary gasoline boiling range stream with a second acidic catalyst in a fluid catalytic cracking process riser reactor under a second set of conversion conditions including a catalyst to feedstock weight ratio of about 0.5 to 20, a catalyst contact time of about 1 to 50 seconds and a reaction temperature of about 420° to 600° C., to produce a gasoline product suitable for use a motor fuel blending stock.

Claim 3

The process of claim 1 wherein said second catalyst comprises a zeolite.

Claim 4

The process of claim 1 wherein said second catalyst has the structure of zeolite Beta.

Claim 5

The process of claim 1 wherein said catalytic cracking unit comprises primary and secondary riser reactors, and wherein said process further comprises charging said secondary gasoline boiling range stream to said primary riser reactor.

Claim 6

The process of claim 1 wherein said catalytic cracking unit comprises primary and secondary riser reactors, and wherein said process further comprises charging said secondary gasoline boiling range stream to said secondary riser reactor.

Claim 7

The process of claim 1 wherein said first and second catalysts have the structure of at least one selected from the group consisting of ZSM-5, ZSM-11, ZSM-22, ZSM-23, ZSM-35 and ZSM-48.

Claim 8

The process of claim 1 wherein said first and second catalysts comprise zeolites having the structure of ZSM-5.

Claim 9

The process of claim 1 wherein said second set of conversion conditions includes a catalyst to feedstock weight ratio of about 1 to 5, a catalyst contact time of about 3 to 5 seconds and a reaction temperature of about 520° to 550° C.

Claim 10

An olefin oligomerization process for converting a feedstream containing C 6 - olefins to a primary product containing distillate boiling range hydrocarbons and for producing upgraded gasoline comprising the steps of: (a) contacting said hydrocarbon feedstream with a first zeolite catalyst having a Constraint Index of between about 1 and 12 under a first set of conversion conditions including pressure between about 1480 and 13900 kPa, temperature between about 170° and 370° C. and weight hourly space velocity (WHSV) between about 1 and 50 hr -1 to form a primary product containing distillate boiling range hydrocarbons and a secondary gasoline boiling range stream; (b) separating said secondary gasoline boiling range stream from said primary product; and (c) contacting said secondary gasoline boiling range stream with a second acidic catalyst in a fluid bed catalytic cracking process riser reactor under a second set of conversion conditions including a catalyst to feedstock weight ratio of about 0.5 to 20, a catalyst contact time of about 1 to 50 seconds and a reaction temperature of about 420° to 600° C., to produce a gasoline product suitable for use as a motor fuel blending stock.

Claim 11

An olefin oligomerization process for converting a feedstream containing C 6 - olefins to a primary product containing distillate boiling range hydrocarbons and for producing upgraded gasoline comprising the steps of: (a) contacting said hydrocarbon feedstream with a first zeolite catalyst having a Constraint Index of between about 1 and 12 under a first set of conversion conditions including pressure between about 1480 and 13900 kPa, temperature between about 170° and 370° C. and weight hourly space velocity (WHSV) between about 1 and 50 hr -1 to form a primary product containing distillate boiling range hydrocarbons and a secondary gasoline boiling range stream; (b) separating said secondary gasoline boiling range stream from said primary product; and (c) contacting said secondary gasoline boiling range stream with a second acidic catalyst in a fluid bed catalytic cracking process riser reactor under a second set of conversion conditions including a catalyst to feedstock weight ratio of about 0.5 to 20, a catalyst contact time of about 1 to 50 seconds and a reaction temperature of about 420° to 600° C., to produce a gasoline product suitable for use as a motor fuel blending stock.

Claim 12

The process of claim 9 wherein said second catalyst comprises a zeolite.

Claim 13

The process of claim 9 wherein said second catalyst has the structure of zeolite Beta.

Claim 14

The process of claim 9 further comprising charging said secondary gasoline boiling-range stream to a primary riser reactor of a catalytic cracking unit.

Claim 15

The process of claim 9 further comprising charging said secondary gasoline boiling-range stream to a secondary riser reactor of a catalytic cracking unit.

Claim 16

The process of claim 9 wherein said first and second catalysts have the structure of at least one selected from the group consisting of ZSM-5, ZSM-11, ZSM-22, ZSM-23, ZSM-35 and ZSM-48.

Claim 17

The process of claim 9 wherein said first and second catalysts comprise zeolites having the structure of ZSM-5.

Claim 18

The process of claim 9 wherein said second set of conversion conditions includes a catalyst to feedstock weight ratio of about 1 to 5, a catalyst contact time of about 3 to 5 seconds and a reaction temperature of about 520° to 550° C.

Claim 19

An olefin oligomerization process for converting a feedstream containing C 6 olefins to a primary product containing lubricant boiling range hydrocarbons and for producing upgraded gasoline comprising the steps of: (a) contacting said hydrocarbon feedstream with a first zeolite catalyst having a Constraint Index of between about 1 and 12 under a first set of conversion conditions including pressure between about 3500 and 21000 kPa, temperature between about 170° and 320° C. and weight hourly space velocity (WHSV) between about 0.1 and 10 hr -1 to form a primary product containing lubricant boiling range hydrocarbons and a secondary gasoline boiling range stream; (b) separating said secondary gasoline boiling range stream from said primary product; and (c) contacting said secondary gasoline boiling range stream with a second acidic catalyst in a fluid catalytic cracking process riser reactor under a second set of conversion conditions including a catalyst to feedstock weight ratio of about 0.5 to 20, a catalyst contact time of about 1 to 50 seconds and a reaction temperature of about 420° to 600° C., to produce a gasoline product suitable for use as a motor fuel blending stock.

Claim 20

An olefin oligomerization process for converting a feedstream containing C 6 olefins to a primary product containing lubricant boiling range hydrocarbons and for producing upgraded gasoline comprising the steps of: (a) contacting said hydrocarbon feedstream with a first zeolite catalyst having a Constraint Index of between about 1 and 12 under a first set of conversion conditions including pressure between about 3500 and 21000 kPa, temperature between about 170° and 320° C. and weight hourly space velocity (WHSV) between about 0.1 and 10 hr -1 to form a primary product containing lubricant boiling range hydrocarbons and a secondary gasoline boiling range stream; (b) separating said secondary gasoline boiling range stream from said primary product; and (c) contacting said secondary gasoline boiling range stream with a second acidic catalyst in a fluid catalytic cracking process riser reactor under a second set of conversion conditions including a catalyst to feedstock weight ratio of about 0.5 to 20, a catalyst contact time of about 1 to 50 seconds and a reaction temperature of about 420° to 600° C., to produce a gasoline product suitable for use as a motor fuel blending stock.

Claim 21

The process of claim 17 wherein said second catalyst comprises a zeolite.

Claim 22

The process of claim 17 wherein said second catalyst has the structure of zeolite Beta.

Claim 23

The process of claim 17 wherein said riser reactor is the primary riser reactor of a catalytic cracking unit.

Claim 24

The process of claim 17 wherein said riser reactor is the secondary riser reactor of a catalytic cracking unit.

Claim 25

The process of claim 17 wherein said first and second catalysts have the structure of at least one selected from the group consisting of ZSM-5, ZSM-11, ZSM-22, ZSM-23, ZSM-35 and ZSM-48.

Claim 26

The process of claim 17 wherein said first and second catalysts comprise zeolites having the structure of ZSM-5.

Claim 27

The process of claim 17 wherein said second set of conversion conditions includes a catalyst to feedstock weight ratio of about 1 to 5, a catalyst contact time of about 3 to 5 seconds and a reaction temperature of about 520° to 550° C.

Claim 28

A catalytic dewaxing process for decreasing the relative wax content of a waxy hydrocarbon feedstream and for producing upgraded gasoline comprising the steps of: (a) contacting said waxy hydrocarbon feedstream with a first zeolite catalyst having a Constraint Index of between about 1 and 12 under a first set of dewaxing conditions including pressure between about 170 and 21000 kPa, reactor inlet temperature between about 260° and 450° C. and hydrogen dosage between 0 and 3000 SCF/BBL feed to form a primary at least partially dewaxed product and a secondary gasoline boiling range stream; (b) separating said secondary gasoline boiling range stream from said primary product; (c) contacting said secondary gasoline boiling range stream with a second acidic catalyst in a fluid catalytic cracking process riser reactor under a second set of conversion conditions including a catalyst to feedstock weight ratio of about 0.5 to 20, a catalyst contact time of about 1 to 50 seconds and a reaction temperature of about 420° to 600° C., to produce a gasoline product suitable for use as a motor fuel blending stock.

Claim 29

A catalytic dewaxing process for decreasing the relative wax content of a waxy hydrocarbon feedstream and for producing upgraded gasoline comprising the steps of: (a) contacting said waxy hydrocarbon feedstream with a first zeolite catalyst having a Constraint Index of between about 1 and 12 under a first set of dewaxing conditions including pressure between about 170 and 21000 kPa, reactor inlet temperature between about 260° and 450° C. and hydrogen dosage between 0 and 3000 SCF/BBL feed to form a primary at least partially dewaxed product and a secondary gasoline boiling range stream; (b) separating said secondary gasoline boiling range stream from said primary product; (c) contacting said secondary gasoline boiling range stream with a second acidic catalyst in a fluid catalytic cracking process riser reactor under a second set of conversion conditions including a catalyst to feedstock weight ratio of about 0.5 to 20, a catalyst contact time of about 1 to 50 seconds and a reaction temperature of about 420° to 600° C., to produce a gasoline product suitable for use as a motor fuel blending stock.

Claim 30

The process of claim 21 wherein said dewaxing conversion conditions are lubricant dewaxing conditions including reactor inlet temperature between about 260° and 360° C.

Claim 31

The process of claim 21 wherein said dewaxing conditions are distillate dewaxing conditions including reactor inlet temperature between about 260° and 460° C.

Claim 32

The process of claim 21 wherein said second catalyst comprises a zeolite.

Claim 33

The process of claim 21 wherein said second catalyst has the structure of zeolite Beta.

Claim 34

The process of claim 21 further comprising charging said secondary gasoline boiling-range stream to a primary riser reactor of a catalytic cracking unit.

Claim 35

The process of claim 21 further comprising charging said secondary gasoline boiling-range stream to a secondary riser reactor of a catalytic cracking unit.

Claim 36

The process of claim 21 wherein said first and second catalysts have the structure of at least one selected from the group consisting of ZSM-5, ZSM-11, ZSM-22, ZSM-23, ZSM-35 and ZSM-48.

Claim 37

The process of claim 21 wherein said first and second catalysts comprise zeolites having the structure of ZSM-5.

Claim 38

The process of claim 21 wherein said second set of conversion conditions includes a catalyst to feedstock weight ratio of about 1 to 5, a catalyst contact time of about 3 to 5 seconds and a reaction temperature of about 520° to 550° C.