Method for producing renewable C3 hydrocarbons and renewable aromatic hydrocarbons

A method for producing renewable C3 hydrocarbons and renewable aromatic hydrocarbons from a renewable feedstock selected from animal oils, animal fats, plant oils, vegetable oils, microbial oils, and mixtures thereof, the method comprising the following steps:

• a) pre-treating the renewable feedstock by reducing the amount of impurities therein not to include:
• more than 10 w-ppm alkali metal and alkaline earth metal impurities, calculated as elemental alkali metals and alkaline earth metals;
• more than 10 w-ppm other metals, calculated as elemental metals;
• more than 1000 w-ppm nitrogen containing impurities, calculated as elemental nitrogen;
• more than 30 w-ppm phosphorus containing impurities, calculated as elemental phosphorus;
• more than 5 w-ppm silicon containing impurities, calculated as elemental silicon;
• to produce a pre-treated feedstock,
• b) subjecting the pre-treated feedstock to hydrodeoxygenation reaction to produce a hydrodeoxygenated stream, wherein the hydrodeoxygenation reaction comprise one or more of:
• a. a temperature in the range from 250° C. to 400° C.,
• b. a pressure in the range from 10 bar to 200 bar,
• c. a WHSV in the range from 0.25 h−1 to 3 h−1,
• d. a H2 flow of 350 to 1500 N-L H2/L feed, and
• e. a hydrodeoxygenation catalyst selected from Pd, Pt, Ni, Co, Mo, Ru, Rh, and W or any combination thereof, on a support,
• c) subjecting the hydrodeoxygenated stream to a gas-liquid separation to produce a gaseous stream and a hydrodeoxygenated liquid stream,
• d) subjecting the hydrodeoxygenated liquid stream to catalytic cracking conditions comprising
• i. a temperature in a range from 300° C. to 700° C.,
• ii. a residence time from 0.2 s to 7200 s, and
• iii. a catalyst comprising a zeolite and a support, wherein the zeolite is ZSM-12 with a pore size below 0.7 nm and at least one property selected from the group consisting of:
• an aluminum content from 0.1 wt-% to 1.5 wt;
• a BET surface area from 200 m2/g to 380 m2/g, determined by nitrogen physisorption;
• the ratio of the Brønsted acid sites to the Lewis acid sites is 1.7-4 determined by pyridine FT-IR;
• acidity from 180 umol/g to 500 umol/g, determined by NH3-TPD method wherein acidity is calculated from the amount of NH3 absorbed at 200° C. and desorbed between 100° C. and 500° C.,
• to produce a catalytically cracked stream, and subsequently
• e) separating the catalytically cracked stream at least to
• i) a fraction comprising the renewable C3 hydrocarbons, and
• ii) a fraction comprising the renewable aromatic hydrocarbons.