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AssigneeShell Oil Company
InventorsSteven Allen Holmes, Ronald Wayne Dever
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The invention provides for a mineral insulating oil having a naphthenic base oil and a paraffinic base oil wherein the naphthenic base oil includes a ratio of total sulfur to basic nitrogen of less than about 80:1. The invention also provides for a mineral insulating oil having a naphthenic base oil, a paraffinic base oil, and an antioxidant agent wherein the naphthenic base oil includes a ratio of total sulfur to basic nitrogen of less than about 80:1. The invention also provides for a process for producing a mineral insulating oil including contacting a naphthenic base oil and a paraffinic base oil wherein the naphthenic base oil includes a ratio of total sulfur to basic nitrogen of less than about 80:1. The invention also provides for a process for producing a mineral insulating oil including contacting a naphthenic base oil, a paraffinic base oil, and an antioxidant agent wherein the naphthenic base oil includes a ratio of total sulfur to basic nitrogen of less than about 80:1.
A mineral insulating oil comprising a naphthenic base oil, a paraffinic base oil, and a component selected from the group consisting of a pour point depressant, an anti-gassing agent, and combinations thereof, wherein the naphthenic base oil comprises a ratio of total sulfur to basic nitrogen of less than about 80:1 and a ratio of sulfide sulfur to basic nitrogen of greater than about 10:1, wherein the naphthenic base oil is present in an amount in a range of from about 60 weight percent to about 95 weight percent based on the total weight of the mineral insulating oil and further wherein the paraffinic base oil is present in an amount in a range of from about 5 weight percent to about 40 weight percent based on the total weight of the mineral insulating oil.
A process for producing a mineral insulating oil comprising contacting a naphthenic base oil, a paraffinic base oil, and a component selected from the group consisting of a pour point depressant, an anti-gassing agent, and combinations thereof, wherein the naphthenic base oil comprises a ratio of total sulfur to basic nitrogen of less than about 80:1, wherein the naphthenic base oil is present in an amount in a range of from about 60 weight percent to about 95 weight percent based on the total weight of the mineral insulating oil and further wherein the paraffinic base oil is present in an amount in a range of from about 5 weight percent to about 40 weight percent based on the total weight of the mineral insulating oil.
Dependencies are inferred from the claim text.