Acylation of lower olefin oligomers
Patent 5021178 Issued on June 4, 1991. Estimated Expiration Date: 
February 7, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
February 7, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2297039 2315046 2355703 2411823 2457696 3030359 Process of making high VI lubes Production of lubricant range hydrocarbons from light olefins Production of lubricant range hydrocarbons from light olefins Patent #: 4658079 InventorsAssigneeApplicationNo. 476080 filed on 02/07/1990US Classes:508/577, Organic oxygen compound508/578, Carbocyclic ring bonded directly to the carbon of a carbonyl group (e.g., phenyl ketones, anthraquinones, etc.)568/397, Reactant contains -COO- group568/398Carbon to carbon unsaturation in the reactantExaminersPrimary: Willis, Prince E.Assistant: McAvoy, Ellen M. Attorney, Agent or FirmInternational ClassesC10M 105/20C10M 129/24 AbstractOligomers produced from lower alkenes by acidic zeolite catalyzed oligomerization can be converted to useful lubricant additives or lubricants by acylation of olefinic bonds in the oligomers, whereby oligomers containing alpha, beta unsaturated ketone structures are produced. The products so produced from C20 + olefins exhibit favorable lubricant qualities of viscosity index and low pour points. The discovery is particularly applicable to the acylation of oligomers produced from lower alkenes such as propylene by oligomerization using a ZSM-5 catalyst which has been surface deactivated. |
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