The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 11, 1993
Filed:
Sep. 23, 1991
Catherine S Chen, Berkeley Heights, NJ (US);
Dennis H Hoskin, Westampton, NJ (US);
Suzanne E Schramm, Robinsville, NJ (US);
Mobil Oil Corporation, Fairfax, VA (US);
Abstract
The 350.degree.-650.degree. F. (177.degree.-343.degree. C.) portion of the product from the oligomerization of light olefin with surface deactivated shape selective medium pore zeolite catalyst particles comprises olefinic hydrocarbons having unique and desirable structures as precursors for high cetane value clean fuels. These oligomers are near linear in structure and contain no aromatics. Following hydrogenation they produce cetane values between 50 and 75. When the near linear olefinic hydrocarbons from surface deactivated zeolite catalyzed oligomerization of light olefins are subjected to ethene metathesis to alpha olefins and oligomerization following the process of Chen et al in U.S. Pat. No. 4,962,249 the overall process reaction product comprises a mixture of a 650.degree. F.+ portion comprising high VI lubricant and a 350.degree.-650.degree. F. portion comprising high cetane clean fuels precursor. Hydrogenation of the 350.degree.-650.degree. F. portion provides an aromatics-free fuel with a cetane value between 50-75 containing less than 0.5 wt % naphthenes. The combined process results in the co-production of high cetane clean fuels and high VI synthetic lubricant.