Patent ID: 7998339

Claim:
A base oil, comprising branched hydrocarbons having carbon numbers of at least C 18 , and at least 90% by weight of saturated hydrocarbons, 5-15% by weight of mononaphthenes and further comprising not more than 1% by weight of fused dinaphthenes and polynaphthenes, and wherein at least 75% by weight of the saturated hydrocarbons have a width of the carbon number range of no more than 9, wherein the kinematic viscosity KV100 is from 3 cSt to 8 cSt, and wherein the low temperature dynamic viscosity CCS-30 is no more than 34.066*(KV100) 2.3967 cP, and wherein the 14 C isotope content of the total carbon content in the base oil is at least 50% of the 14 C isotope level in the year 1950, and wherein said base oil is obtained in a process comprising ketonisation, hydrodeoxygenation and isomerization steps, using a feedstock comprising at least one compound selected from the group consisting of triglycerides, carboxylic acids having a carbon number C 1 -C 38 , esters of C 1 -C 38 carboxylic acids with C 1 -C 11 alcohols, C 1 -C 38 alcohols, C 1 -C 38 aldehydes, C 1 -C 38 carboxylic acid anhydrides, and metal salts of C 1 -C 38 carboxylic acids, esters of C 1 -C 38 carboxylic acids with C 12 -C 38 alcohols, natural waxes, dicarboxylic acids and polyols, and the ketonisation is carried out in the presence of metal oxide catalyst under a pressure from 0 to 10 MPa and at a temperature ranging from 100 to 500° C., the ketonisation product is hydrodeoxygenated in the presence of a hydrodeoxygenation catalyst containing at least one component selected from the group consisting of metals of the Group VIII or Group VIA of the periodic system of the elements and a support, under a hydrogen pressure ranging from 0.1 to 20 MPa at a temperature ranging from 100 to 500° C., and the isomerization is carried out in the presence of a isomerization catalyst containing a metal of the Group VIII of the periodic system of the elements and/or a support, under a hydrogen pressure ranging from 0 to 20 MPa at a temperature ranging from 100 to 500° C.