Claims
- 1. An alkylation process for producing high octane gasoline comprising reacting a stream of an isoparaffin containing from 4 to 20 carbon atoms with a stream of an olefin containing from 2 to 12 carbon atoms at a temperature from about -40.degree. C. to about 500.degree. C. and at a pressure in the range of subatmospheric to about 5000 psig in an alkylation zone using a reaction mixture wherein a molar ratio of the isoparaffin to the olefin in the combined hydrocarbon feed is from about 1:1 to about 50:1 in the presence of added water and in contact with an alkylation catalyst comprising a Lewis acid and a bound and/or unbound large pore zeolite.
- 2. The process of claim 1, wherein the isoparaffin contains from 4 to 6 carbon atoms and the olefin contains from 2 to 6 carbon atoms.
- 3. The process of claim 1, wherein the Lewis acid is BF.sub.3, BCl.sub.3, SbF.sub.5 and/or AlCl.sub.3.
- 4. The process of claim 1, wherein the Lewis acid is BF.sub.3.
- 5. The process of claim 1 wherein the zeolite is selected from the group consisting of ZSM-3, ZSM-4, ZSM-12, ZSM-18, ZSM-20, zeolite Beta, zeolite L, mordenite, faujasite and zeolite Y.
- 6. The process of claim 1, wherein the catalyst is BF.sub.3 /zeolite Beta.
- 7. The process of claim 1, wherein the reaction is conducted under sufficient pressure to maintain at least one of the reactants in the liquid phase.
- 8. The process of claim 1, wherein the molar ratio of the isoparaffin to the olefin is from about 5:1 to about 25:1.
- 9. The process of claim 1, wherein the isoparaffin is isobutane and the olefin is propylene and/or butene.
- 10. The process of claim 1, wherein the water and/or water-producing material is preintroduced into the catalyst.
- 11. The process of claim 1, wherein the water and/or water-producing material is cofed with the reactants.
- 12. The process of claim 10, wherein the amount of water preintroduced into the catalyst ranges from about 0.5 to about 25 percent by weight of the catalyst.
- 13. The process of claim 10, wherein the amount of water preintroduced into the catalyst ranges from about 1.0 to about 10 percent by weight of the catalyst.
- 14. The process of claim 11, wherein the amount of water ranges from about 0.1 ppmw to about 1 weight percent based upon the total hydrocarbon feed rate.
- 15. The process of claim 11, wherein the amount of water ranges from about 0.1 ppmw to about 500 ppmw based upon the total hydrocarbon feed rate.
- 16. The process of claim 1, wherein water is added intermittently to the reaction.
- 17. The process of claim 1, wherein reaction temperature is from about -40.degree. C. to about 250.degree. C.
- 18. The process of claim 1, wherein the weight hourly space velocity of that olefin is from about 0.01 to about 100.
- 19. The process of claim 1 where the zeolite is contained in a matrix.
- 20. The process of claim 1 wherein the Lewis acid is present in an amount in excess of that required to substantially saturate the zeolite and any binder or matrix material with which the zeolite may be associated, and in which the excess level of Lewis acid is maintained by continuous or intermittent introduction of fresh and/or recycled Lewis acid in the alkylation zone.
- 21. An alkylation process for producing high octane gasoline comprising reacting a stream of an isoparaffin containing from 4 to 20 carbon atoms with a stream of an olefin containing from 2 to 12 carbon atoms at a temperature from about -40.degree. C. to about 250.degree. C. and at a pressure from about subatmospheric to about 500 psig in an alkylation zone into which water is introduced in an amount from about 0.1 ppmw to about 500 ppmw water based on total hydrocarbon feed at a molar ratio of the isoparaffin to the olefin from about 5:1 to about 25:1 in contact with an alkylation catalyst comprising a Lewis acid and bound and/or unbound large pore zeolite.
- 22. A process according to claim 21 in which the weight hourly space velocity of the olefin feed stream is from 0.01 to 100.
- 23. A process according to claim 22 in which the water is present in the alkylation zone in an amount of from about 0.1 to about 500 ppmw, based on the total hydrocarbon feed to the alkylation zone.
Parent Case Info
This is a continuation of copending application Ser. No. 219,130, filed on July 15, 1988, now abandoned.
US Referenced Citations (19)
Continuations (1)
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Number |
Date |
Country |
Parent |
219130 |
Jul 1988 |
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