METHOD OF OBTAINING BIOFUEL FROM FAT-CONTAINING HYDROBIONT WASTES Russian patent published in 2012 - IPC C10L1/02 C07C67/02 

FIELD: chemistry.

SUBSTANCE: invention relates to the fish industry and methods of producing biofuel from hydrobiont wastes. The method of obtaining biofuel from fat-containing hydrobiont wastes involves obtaining fish oil with acid number of 2.1-4.6 mg KOH/g. The fish oil is neutralised by adding alkali until attaining acid number of 0.7 mg KOH/g. The neutralised fat, which contains soap and alkali residues, is washed once with 10% salt solution and twice with water at temperature 90-95°C for 90 minutes. The fish oil undergoes reesterification while adding 25% ethanol and 0.75% dry NaOH based on the weight of the fat used.

EFFECT: improved method and high output of biofuel.

1 cl, 1 ex