METHOD OF PRODUCING BIODIESEL FUEL FROM RESERVOIR MUD AND/OR SEWAGE TREATMENT PLANT SLUDGE Russian patent published in 2013 - IPC C10G3/00 C10L5/40 C11C3/04 C02F1/00 

FIELD: chemistry.

SUBSTANCE: material cells are mechanically disintegrated; lipids are extracted using a Folch method, involving extraction of lipids with a mixture of chloroform and methanol (2:1 by volume), followed by washing the extract with KCl solution (0.88%) and, after demixing and removing the top phase, with a mixture of 0.88% KCl solution and methanol (1:1 by volume); the KCl solution and the mixture are added in an amount of 1/4 part of the obtained and remaining volume of extract, respectively; the ready lipid extract is dried by passing through a layer of anhydrous Na₂SO₄; the dry extract is then re-esterified with a mixture of methanol and acid catalyst, where the methanol is mixed with the catalyst in ratio of 50:1 by volume; biodiesel is extracted from the reaction mixture with hexane; the biodiesel extract is dried by passing through a layer of anhydrous Na₂SO₄.

EFFECT: obtaining biodiesel using a cheap and simple method by processing mud or sludge from treatment facilities.

1 tbl, 2 ex