It has been shown that borate-containing alumina can be used as a support for sunflower oil hydrodeoxygenation catalysts at 380 degrees C, 4.0 MPa, and a feed space velocity of 1 h(-1) with a liquid product yield of 81-85 wt %. It has been found that, with an increase in the boron oxide content in the catalyst, owing to an increase in the catalyst acidity, the fraction of isoalkanes in the products increases to 77-78% and the contribution of decarboxylation/decarbonylation reactions to the formation of the products increases.