Isoparaffin alkylation with a lighter olefin and subsequently with a heavier olefin
AssigneeUniversal Oil Products Company
InventorJay E. Sobel
Life of this patent
Estimating the term…
Abstract
A process for alkylating an isoparaffin with a lighter olefin and a heavier olefin by contacting the isoparaffin with the lighter olefin and a first alkylation catalyst in a first alkylation zone, contacting the hydrocarbon effluent from the first alkylation zone with the heavier olefin and a second alkylation catalyst in a second alkylation zone, and recovering the product of the process from the hydrocarbon effluent from the second alkylation zone.
Claims7
A process for producing an alkylation reaction product from an isoparaffin reactant, a lighter olefinic reactant and a heavier olefinic reactant which comprises the steps of:
- (a) contacting said isoparaffinic reactant and said lighter olefinic reactant with a first hydrogen fluoride alkylation catalyst in a first alkylation zone at first alkylation conditions;
- (b) settling from said first alkylation zone a first hydrocarbon phase which comprises a portion of said isoparaffinic reactant and a portion of said alkylation reaction product;
- (c) contacting said heavier olefinic reactant and at least a portion of said first hydrocarbon phase with a second hydrogen fluoride alkylation catalyst in a second alkylation zone at second alkylation conditions;
- (d) settling from said second alkylation zone a second hydrocarbon phase which comprises at least a portion of said alkylation reaction product;
- and,
- (e) recovering said alkylation reaction product from said second hydrocarbon phase.
[4. The process of claim 1 wherein said first alkylation catalyst is hydrogen fluoride alkylation catalyst.]
[5. The process of claim 1 wherein said second alkylation catalyst is hydrogen fluoride
- alkylation catalyst.] 6. The process of claim [4] 1 wherein said first hydrogen fluoride alkylation catalyst [is a hydrogen fluoride alkylation catalyst comprising] comprises about 80 wt. percent to about 99 wt. percent hydrogen fluoride and said first alkylation conditions include a
- temperature of about 60.degree. F. to about 150.degree. F. 7. The process of claim [5] 1 wherein said second hydrogen fluoride alkylation catalyst [is a hydrogen fluoride alkylation catalyst comprising] comprises about 65 wt. percent to about 95 wt. percent hydrogen fluoride and said second alkylation conditions include a temperature of about 0.degree. F. to about
- 110.degree. F. 8. The process of claim 1 wherein an isoparaffinc recycle stream is recovered from said second hydrocarbon phase and at least a portion of said isoparaffinic recycle stream is introduced into said first
- alkylation zone. 9. The process of claim 1 wherein said isoparaffinic reactant comprises isobutane.
[10. The process of claim 1 wherein said first alkylation catalyst is selected from sulfuric acid, phosphoric acid and a crystalline aluminosilicate catalytically active for isoparaffin-olefin alkylation.]
[11. The process of claim 1 wherein said second alkylation catalyst is selected from sulfuric acid, phosphoric acid and a crystalline aluminosilicate catalytically active for
- isoparaffin-olefin alkylation.] 12. The process of claim 6 wherein said first alkylation conditions include a temperature of about 75.degree. F. to about 120.degree. F. and said first hydrogen fluoride alkylation catalyst comprises about 85 wt. percent to about 99
- wt. percent hydrogen fluoride. 13. The process of claim 7 wherein said second alkylation conditions include a temperature of about 50.degree. F. to about 100.degree. F. and said second hydrogen fluoride alkylation catalyst comprises about 70 wt. percent to about 95 wt. percent hydrogen fluoride.
Dependencies are inferred from the claim text.