Blending of economic, ether free summer gasoline

Abstract

Provided is a novel high octane summer gasoline composition which is substantially free of ethers, and in compliance with the California Predictive Model. The gasoline composition is suitable for use in the summer, i.e., having a Reid vapor pressure of 7.2 or less, and more preferably 7.0 or less. The method for blending the gasoline comprises blending streams from a refinery in a controlled manner to maintain compliance with the California Predictive Model.

1. A method of blending unleaded gasolines which are substantially free of ethers, which have an octane number of at least 90 (R+M)/2, and which have a Reid vapor pressure of 7.00 or less, which method comprises
 (a) blending some or all gasoline component streams from an oil refinery and keeping the blend substantially free of ether compounds, and with a sulfur content of less than 10 ppmw sulfur, and  
 (b) controlling the blending of the streams such that the blended unleaded gasoline is in compliance with a California Predictive Model.  
 
     
     
       2. The method of  claim 1 , wherein the blending of the streams from an oil refinery is on a continuous basis. 
     
     
       3. The method of  claim 1 , wherein testing of the blended unleaded gasoline is conducted for compliance with the California Phase 2 or Phase 3 Predictive Model, and necessary adjustments in the blends based on the results of the testing are made to maintain compliance with the California Phase 2 or Phase 3 Predictive Model. 
     
     
       4. The method of  claim 3 , wherein the testing is conducted on a continuous basis. 
     
     
       5. The method of  claim 3 , wherein the testing is conducted on a periodic basis. 
     
     
       6. The method of  claim 2 , wherein testing of the blended unleaded gasoline is conducted for compliance with the California Phase 2 or Phase 3 Predictive Model, and necessary adjustments in the blends based on the results of the testing are made to maintain compliance with the California Phase 2 or Phase 3 Predictive Model. 
     
     
       7. The method of  claim 1 , wherein the streams are blended such that the blended gasoline has an octane of at least 91 (R+M)/2. 
     
     
       8. The method of  claim 1 , wherein the streams are blended such that the blended gasoline has an octane of at least 92 (R+M)/2. 
     
     
       9. The method of  claim 1 , wherein the streams are blended such that the blended gasoline has an octane of at least 93 (R+M)/2. 
     
     
       10. The method of  claim 1 , wherein the streams are blended such that the blended gasoline is in compliance with the flat specification compliance option of CARB. 
     
     
       11. The method of  claim 1 , wherein the streams are blended such that the blended gasoline is in compliance with the averaging specification compliance option of CARB. 
     
     
       12. The method of  claim 1 , wherein the streams blended result in a blended gasoline having oxygen attributable to ether of less than 0.5 wt. %. 
     
     
       13. The method of  claim 1 , wherein the streams blended are blended such that the resulting blended gasoline contains oxygen attributable to ethers of less than 0.1 wt. %. 
     
     
       14. The method of  claim 1 , wherein the streams are blended such that the blended gasoline contains oxygen attributable to ethers of less than 0.05 wt. %. 
     
     
       15. The method of  claim 1 , wherein the blended gasoline contains less than 5 ppm wt. sulfur. 
     
     
       16. The method of  claim 1 , wherein the streams are blended such that the blended gasoline contains less than 8 vol. % olefins. 
     
     
       17. The method of  claim 16 , wherein the blended gasoline contains less than 6 vol. % olefins. 
     
     
       18. The method of  claim 16 , wherein the blended gasoline contains less than 3 vol. % olefins. 
     
     
       19. The method of  claim 1 , wherein the streams are blended such that the blended gasoline exhibits a T 50  of less than 203° F. 
     
     
       20. The method of  claim 19 , wherein the blended gasoline exhibits a T 50  of less than 200° F. 
     
     
       21. The method of  claim 19 , wherein the blended gasoline exhibits a T 50  of less than 190° F. 
     
     
       22. The method of  claim 1 , when the streams are blended such that the blended gasoline contains less than 0.5 vol. % benzene. 
     
     
       23. A blended gasoline composition prepared by the method of  claim 1 . 
     
     
       24. The gasoline composition of  claim 23 , wherein the blended gasoline composition has an octane of at least 91 (R+M)/2. 
     
     
       25. The gasoline composition of  claim 23 , wherein the composition has an octane from of at least 92 (R+M)/2. 
     
     
       26. The gasoline composition of  claim 23 , wherein the gasoline has an octane of at least 93 (R+M)/2. 
     
     
       27. The gasoline composition of  claim 23 , wherein the composition contains oxygen attributable to ethers in an amount less than 0.5 wt. %. 
     
     
       28. The gasoline composition of  claim 23 , wherein the composition contains oxygen attributable to ethers in an amount less than 0.1 wt. %. 
     
     
       29. The gasoline composition of  claim 23 , wherein the composition contains oxygen attributable to ethers in an amount less than 0.05 wt. %. 
     
     
       30. The gasoline composition of  claim 23 , wherein the composition contains less than 5 ppm wt. sulfur. 
     
     
       31. The gasoline composition of  claim 23 , wherein the composition contains less than 8 vol. % olefins. 
     
     
       32. The gasoline composition of  claim 23 , wherein the composition contains less than 6 vol. % olefins. 
     
     
       33. The gasoline composition of  claim 23 , wherein the composition contains less than 3 vol. % olefins. 
     
     
       34. The gasoline composition of  claim 23 , wherein the composition exhibits a T 50  of less than 203° F. 
     
     
       35. The gasoline composition of  claim 23 , wherein the composition exhibits a T 50  of less than 200° F. 
     
     
       36. The gasoline composition of  claim 23 , wherein the composition exhibits a T 50  of less than 190° F. 
     
     
       37. The gasoline composition of  claim 23 , wherein the composition less than 0.5 vol. % benzene. 
     
     
       38. A gasoline composite which is substantially free of oxygenates, is in compliance with the California Predictive Model, has an octane number of at least 90 (R+M)/2, and a sulfur content of less than 10 ppmw sulfur. 
     
     
       39. The method of  claim 1 , wherein ethanol is blended with the gasoline. 
     
     
       40. The method of  claim 1 , wherein ethanol is blended with the gasoline at a different site. 
     
     
       41. The method of  claim 40 , wherein the ethanol is blended at a terminal site.