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The present invention relates to an olefinic naphtha and a process for producing lower olefinc from this naphtha. In the process of the present invention for producing lower olefins, preferably ethylene, at least a portion of a hydrocarbon asset is converted to synthesis gas and at least a portion o

The present invention relates to an olefinic naphtha and a process for producing lower olefinc from this naphtha. In the process of the present invention for producing lower olefins, preferably ethylene, at least a portion of a hydrocarbon asset is converted to synthesis gas and at least a portion of the synthesis gas is converted to an olefinic naphtha by a Fischer-Tropsch process. At least a portion of the olefinic naphtha is converted in a naphtha cracker to a product stream comprising lower olefins, and at least a portion of the lower olefins from the product stream of the cracker are recovered.

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1. A process of producing an olefinic naphtha comprising:a. converting at least a portion of a hydrocarbon asset to synthesis gas; b. converting at least a portion of the synthesis gas to a hydrocarbon stream in a Fischer Tropsch process unit; c. isolating an olefinic naphtha from the hydrocarbon st

1. A process of producing an olefinic naphtha comprising:a. converting at least a portion of a hydrocarbon asset to synthesis gas; b. converting at least a portion of the synthesis gas to a hydrocarbon stream in a Fischer Tropsch process unit; c. isolating an olefinic naphtha from the hydrocarbon stream, wherein the olefinic naphtha comprises 10 to 80 weight % olefins and 20 to 90 weight % non-olefins, wherein the non-olefins comprise greater than 50 weight % paraffins; d. purifying the olefinic naphtha by contacting the olefinic naphtha with a metal oxide at elevated temperatures; and e. isolating a purified olefinic naphtha having a total acid number of less than 1.5. 2. A process according to claim 1, wherein the metal oxide is selected from the group consisting of alumina, silica, silica-alumina, zeolites, clays, and mixtures thereof.3. A process according to claim 1, further comprising the step of separating water and carbon dioxide formed in the purifying step from the purified olefinic naphtha.4. A process according to claim 1, wherein the purifying step reduces the content of solids, acids, and alcohols in the olefinic naphtha.5. A process according to claim 1, wherein the purified naphtha isolated has a total acid number of less than 0.5.6. A process according to claim 2, wherein the purifying step is performed by passing the olefinic naphtha through a purification unit containing a metal oxide at 450 to 800° F. less than 1000 psig, and 0.25 to 10 LHSV without added gaseous components.7. A process for producing a blended naphtha comprising:a. converting at least a portion of a hydrocarbon asset to synthesis gas; b. converting at least a portion of the synthesis gas to a hydrocarbon stream in a Fischer Tropsch process reactor; c. isolating an olefinic naphtha comprising 10 to 80 weight % olefins and 20 to 90 weight % non-olefins, wherein the non-olefins comprise greater than 50 weight % paraffins; and d. mixing the olefinic naphtha with a naphtha selected from the group consisting of a hydrocracked Fischer Tropsch derived naphtha, a hydrotreated Fischer Tropsch derived naphtha, a hydrocracked petroleum derived naphtha, a hydrotreated petroleum derived naphtha, and mixtures thereof to provide a blended naphtha, wherein the blended naphtha comprises less than 10 ppm sulfur and has an acid number of less than 1.5. 8. A process according to claim 7, further comprising the step of purifying the olefinic naphtha to reduce dissolved solids and acids therein.9. A process according to claim 8, wherein the purifying step is performed by contacting the olefinic naphtha with a metal oxide at elevated temperatures.10. A process according to claim 9, wherein the metal oxide is selected from the group consisting of alumina, silica, silica-alumina, zeolites, clays, and mixtures thereof.11. A process according to claim 8, wherein the purified naphtha has a total acid number of less than 0.5.12. A process according to claim 8, wherein the purifying step is performed by passing the olefinic naphtha through a purification unit containing a metal oxide at 450 to 800 F.°, less than 1000 psig, and 0.25 to 10 LHSV without added gaseous components.13. A process according to claim 7, wherein the blended naphtha comprises 10 to 90 weight % olefinic naphtha.14. A process according to claim 7, wherein the blended naphtha comprises less than 2 ppm sulfur.15. A process for producing a blended naphtha comprising:a. providing an olefinic naphtha comprising 10 to 80 weight % olefins and 20 to 90 weight % non-olefins, wherein the non-olefins comprise greater than 50 weight % paraffins; and b. mixing the olefinic naphtha with a naphtha selected from the group consisting of a hydrocracked Fischer Tropsch derived naphtha, a hydrotreated Fischer Tropsch derived naphtha, a hydrocracked petroleum derived naphtha, a hydrotreated petroleum derived naphtha, and mixtures thereof to provide a blended naphtha, wherein the blended naphtha comprises less than 10 ppm sulfur and has an acid number of less than 1.5. 16. The process according to claim 15, wherein the olefinic naphtha comprises 25 to 80 weight % olefins and 20 to 75 weight % non-olefins, wherein the non-olefins comprise greater than 75 weight % paraffins and the olefins comprise greater than 50 weight % linear primary olefins.17. The process according to claim 15, wherein the olefinic naphtha comprises 50 to 80 weight % olefins and 20 to 50 weight % non-olefins, wherein the non-olefins comprise greater than 75 weight % paraffins and the olefins comprise greater than 65 weight % linear primary olefins.18. A process according to claim 15, wherein the blended naphtha has a total acid number of less than 0.5.19. A process according to claim 15, wherein the blended naphtha comprises 10 to 90 weight % olefinic naphtha.20. A process according to claim 15, wherein the blended naphtha comprises less than 2 ppm sulfur.