Biogenic low viscosity insulating oil
View Patent ↗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.
1. 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 C 10 -C 20 ;
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 C 14 -C 20 ;
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 mm 2 /s.
2. The method according to claim 1 , wherein the said kinematic viscosity at 40° C. is selected to fall within a range of 3.6 to 3.9 mm 2 /s, or to be about 3.8 mm 2 /s.
3. The method according to claim 1 , wherein the flash point is selected to be larger than 135° C. and lower than or equal to 155° C., or lower than or equal to 150° C., or lower than or equal to 145° C.
4. The method according to claim 1 , wherein the primary mixture comprises:
isomerized straight chain hydrocarbons selected to be in a range of at least one of C 11 -C 20 , C 11 -C 19 , C 12 -C 19 , or C 12 -C 18 .
5. The method according to claim 1 , wherein the paraffinic base oil comprises:
a mixture of isoalkanes and alkanes selected to be in a range of C 15 -C 19 or C 16 -C 18 .
6. The method according to claim 1 , wherein the antioxidant additive is selected to be in an amount of up to 0.4% by weight, up to 0.3% by weight, or up about to 0.24% by weight.
7. The method according to claim 1 , wherein the antioxidant additive is butylated hydroxytoluene (BHT).
8. The method according to claim 1 , comprising:
mixing the paraffinic base oil with a gassing tendency lowering additive.
9. The method according to claim 1 , wherein the primary mixture comprises:
isomerised straight chain hydrocarbons of fatty acid origin.
10. A non-petroleum based electrical insulating oil manufactured according to the method according to claim 1 .
11. The method according to claim 1 , comprising:
applying the a non-petroleum based electrical insulating oil for cooling of at least one electronic circuit, processor, electronic component, electric transformer, electric shunt reactor, or electric switch gear.
12. 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 C 10 -C 20 ;
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 C 14 -C 20 ;
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 mm 2 /s.
13. The method according to claim 12 , wherein the said kinematic viscosity at 40° C. is selected to fall within a range of 3.6 to 3.9 mm 2 /s, or to be about 3.8 mm 2 /s.
14. The method according to claim 12 , wherein the flash point is selected to be larger than 135° C. and lower than or equal to 155° C., or lower than or equal to 150° C., or lower than or equal to 145° C.
15. The method according to claim 12 , wherein the primary mixture comprises:
isomerized straight chain hydrocarbons selected to be in a range of at least one of C 11 -C 20 , C 11 -C 19 , C 12 -C 19 , or C 12 -C 18 .
16. The method according to claim 12 , wherein the paraffinic base oil comprises:
a mixture of isoalkanes and alkanes selected to be in a range of C 15 -C 19 or C 16 -C 18 .
17. The method according to claim 12 , wherein the antioxidant additive is selected to be in an amount of up to 0.4% by weight, up to 0.3% by weight, or up about to 0.24% by weight.
18. The method according to claim 12 , wherein the antioxidant additive is butylated hydroxytoluene (BHT).
19. The method according to claim 12 , comprising:
mixing the paraffinic base oil with a gassing tendency lowering additive.
20. The method according to claim 12 , wherein the primary mixture comprises:
isomerised straight chain hydrocarbons of fatty acid origin.