Preparation of a fuel blend

A method for preparing a renewable diesel fuel blend, the method comprising:

• subjecting at least two different feedstocks of renewable biological origin, the at least two different feedstocks including a feedstock for obtaining a first fuel component and a feedstock for obtaining a further fuel component, to catalytic cracking in a catalytic cracking unit and to hydrotreatment in a hydrotreatment unit to form a renewable diesel fuel blend having an aromatic hydrocarbon content from 26 to 42 wt-% and a paraffinic hydrocarbon content of less than 53 wt-%, as measured according to ASTM D2425-04 (2011);
• wherein the feedstock for obtaining the first fuel component of the renewable diesel fuel blend is tall oil pitch (TOP), and the feedstock for obtaining the further fuel component of the renewable diesel fuel blend includes at least one of used cooking oil (UCO) and animal fat (AF),
• wherein the formed renewable diesel fuel blend contains 25-75 wt-% first fuel component obtained from tall oil pitch (TOP), and 25-75 wt-% further fuel component obtained from at least one of used cooking oil (UCO) and animal fat (AF),
• wherein the renewable diesel fuel blend is formed by:
• obtaining the first fuel component and the further fuel component from the catalytic cracking and hydrotreatment of the at least two feedstocks, and mixing said first fuel component and said further fuel component together;
• and
• wherein a measured cloud point of the renewable diesel fuel blend is lower than a calculated cloud point of the fuel blend as a weighted mean of measured cloud points of individual components thereof, the individual components being the first fuel component and the at least one further fuel component, wherein the measured cloud points are measured according to ASTM D7689-11 (2012).