Blending of economic, ether free summer gasoline

Abstract

Provided is a novel summer gasoline composition which is substantially free of ethers, contains less than 20 ppm sulfur, and is 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, and more preferably 7.0 or less, but also offers the advantages of low-emissions while being substantially free of ethers. 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 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 has a sulfur content of less than 10 ppmw, and  
 (b) controlling the blending of the streams such that the blended unleaded gasoline is in compliance with the 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 87 (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 89 (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 92 (R+M)/2. 
     
     
       10. The method of  claim 1 , wherein the streams are blended such that the blended gasoline has an octane of at least 90 (R+M)/2. 
     
     
       11. 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. 
     
     
       12. 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. 
     
     
       13. The method of  claim 1 , wherein the streams blended are blended such that the resulting blended gasoline contains less than 0.1 wt. % oxygenates. 
     
     
       14. The method of  claim 1 , wherein the streams are blended such that the blended gasoline contains less than 0.05 wt. % oxygenates. 
     
     
       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 blended gasoline contains less than 1 ppm wt. sulfur. 
     
     
       17. The method of  claim 1 , wherein the streams are blended such that the blended gasoline contains less than 8 vol. % olefins. 
     
     
       18. The method of  claim 17 , wherein the blended gasoline contains less than 6 vol. % olefins. 
     
     
       19. The method of  claim 17 , wherein the blended gasoline contains about 3 vol. % olefins or less. 
     
     
       20. The method of  claim 1 , wherein the streams are blended such that the blended gasoline exhibits a T 50  of less than 203° F. 
     
     
       21. The method of  claim 20 , wherein the blended gasoline exhibits a T 50  of less than about 200° F. 
     
     
       22. The method of  claim 1 , wherein the streams are blended such that the blended gasoline contains about 0.70 vol. % benzene or less. 
     
     
       23. The method of  claim 1 , wherein the streams are blended such that the blended gasoline contains less than 0.5 vol. % benzene. 
     
     
       24. A blended unleaded gasoline composition prepared by the method of  claim 1 . 
     
     
       25. The gasoline composition of  claim 24 , wherein the blended gasoline composition has an octane of at least 87 (R+M)/2. 
     
     
       26. The gasoline composition of  claim 24 , wherein the composition has an octane from of at least 89 (R+M)/2. 
     
     
       27. The gasoline composition of  claim 24 , wherein the gasoline has an octane of at least 92 (R+M)/2. 
     
     
       28. The gasoline composition of  claim 24 , wherein the gasoline has an octane of at least 90 (R+M)/2. 
     
     
       29. The gasoline composition of  claim 24 , wherein the composition contains less than 0.5 wt. % ethers. 
     
     
       30. The gasoline composition of  claim 24 , wherein the composition contains less than 0.1 wt. % ethers. 
     
     
       31. The gasoline composition of  claim 24 , wherein the composition contains less than 0.05 wt. % ethers. 
     
     
       32. The gasoline composition of  claim 24 , wherein the composition contains less than 5 ppm wt. sulfur. 
     
     
       33. The gasoline composition of  claim 24 , wherein the composition contains less than 1 ppm wt. sulfur. 
     
     
       34. The gasoline composition of  claim 24 , wherein the composition contains less than 8 vol. % olefins. 
     
     
       35. The gasoline composition of  claim 24 , wherein the composition contains less than 6 vol. % olefins. 
     
     
       36. The gasoline composition of  claim 24 , wherein the composition contains less than 3 vol. % olefins. 
     
     
       37. The gasoline composition of  claim 24 , wherein the composition exhibits a T 50  of less than 203° F. 
     
     
       38. The gasoline composition of  claim 24 , wherein the composition exhibits a T 50  of less than 200° F. 
     
     
       39. The gasoline composition of  claim 24 , wherein the composition contains about 0.70 vol. % benzene or less. 
     
     
       40. The gasoline composition of  claim 24 , wherein the composition contains less than 0.5 vol. % benzene. 
     
     
       41. An unleaded gasoline composition which is substantially free of oxygenates, is in compliance with the California Code of Regulations, and has a sulfur content of less than 10 ppmw. 
     
     
       42. An unleaded gasoline composition which is substantially free of oxygenates, is in compliance with California Phase 2 reformulated gasoline regulations, and has a sulfur content of less than 10 ppmw. 
     
     
       43. The method of  claim 1 , wherein ethanol is blended with the gasoline. 
     
     
       44. The method of  claim 1 , wherein ethanol is blended with the gasoline at a different site. 
     
     
       45. The method of  claim 44 , wherein the ethanol is blended at a terminal site.