Biogenic low viscosity insulating oil
AssigneesNeste Oyj, Avantherm AB
InventorPer Wiklund
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Abstract
A method of producing a non-petroleum based electrical insulating oil, wherein the method can include providing a primary mixture of non-petroleum origin, containing isomerized straight chain hydrocarbons; performing a distillation and/or stripping of the primary mixture; collecting a paraffinic base oil as a product of the distillation and/or stripping, containing a mixture of isoalkanes and alkanes; and mixing the base oil with an antioxidant additive.
Claims20
A method of producing a non-petroleum based electrical insulating oil, the method comprising:
- providing a primary mixture of non-petroleum origin, containing isomerized straight chain hydrocarbons in a range of C10-C20;
- performing a distillation and/or stripping of the primary mixture;
- collecting a paraffinic base oil as a product of the distillation and/or stripping, containing a mixture of isoalkanes and alkanes in a range of C14-C20;
- mixing the paraffinic base oil with an antioxidant additive;
- repeatedly taking a sample of a product of the distillation and/or stripping;
- and
- controlling collection of the paraffinic base oil in such a way that:
- collection of the product of distillation or stripping is started when a flash point of the sample is larger than 135° C. and lower than or equal to 160° C. measured by closed cup, Pensky-Marten;
- and
- the collection of the product of distillation or stripping is ended when a kinematic viscosity of the sample at 40° C. falls within a range of 3.4 to 4.5 mm2/s.
A method of producing a non-petroleum based electrical insulating oil, the method comprising:
- providing a primary mixture of non-petroleum origin, containing isomerized straight chain hydrocarbons in a range of C10-C20;
- performing a distillation of the primary mixture;
- collecting a paraffinic base oil as a product of the distillation, containing a mixture of isoalkanes and alkanes in a range of C14-C20;
- mixing the paraffinic base oil with an antioxidant additive;
- controlling collection of the paraffinic base oil in such a way that:
- an initial boiling point of a distillation cut is chosen so that a flash point is larger than 135° C. and lower than or equal to 160° C. measured by closed cup, Pensky-Marten;
- and
- a final boiling point of the distillation cut is chosen so that a kinematic viscosity of the paraffinic base oil at 40° C. falls within a range of 3.4 to 4.5 mm2/s.
Dependencies are inferred from the claim text.