TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The hydrotreating catalyst comprises cobalt and molybdenum or nickel and molybdenum on a zeolite support.    TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The separation device is a centrifuge, settling tanks, filtration and/or any other physical solid liquid separation device.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Process: The process further comprises: recycling the ammonia and amide from the second product mixture back to the step (b); and dissolving the solid fatty amide separated from the first product mixture prior to step (d). The step (b) is carried out at 20-300 degrees C and at a pressure of 0-250 psig. The step (d) is carried out at 260-430 degrees C (preferably 300-400 degrees C) and at a pressure 100-2000 (preferably 100-750) psig. Preferred Composition: The free fatty acid is: any carboxylic acid of formula (R1COOH) (I); vegetable oils, yellow grease, animal fats, brown grease, algae oil, palm fatty acid distillates, vegetable oils and/or Jatropha oil; and present in the feedstock in an amount of 0.01-100 (preferably 2-80) wt.% based on the total weight of the feedstock. The ammonia/amine is of formula (R1-NR2R3) (II), preferably monoethanolamine, diethanolamine, methylamine and/or ethylamine. The ratio of the amount of the amine to the amount of the free fatty acid containing feedstock is 10:1-1:1, preferably 5:1 based on the total mole ratio. The solid fatty amide is of formula (R1-CO-NR2R3) (III), preferably oleamide, myristamide, stearamide, arachidamide, palmitamide, lauramide, capramide or caprylamide.R1 = alkyl; andR2, R3 = H, alkyl or hydroxy alkyl. EXAMPLE - Stoichiometric amounts of acidulated vegetable oil (calculated based on free fatty acid content) and monoethanolamine (1:08-12M ratio) were mixed in round-bottomed flask and heated from 165-240 degrees C, at atmosphere pressure in air for 2-6 hours, followed by vacuum removal of excess water (at 30-65 mm mercury) for 3-12 hours. The resulting liquid was cooled into a waxy solid with a melting point of 60-70 degrees C. This material was dissolved in xylene and hydrogenated under standard hydrodesulfurization conditions to give hydrocarbon (12-18C atom linear paraffin of diesel range).