WASTELESS PYROSHALE PROCESSING METHOD Russian patent published in 2007 - IPC C10B53/06 

FIELD: solid fossil fuel processing.

SUBSTANCE: invention relates to processing both organic and mineral parts of shale while simultaneously utilizing crude oil residues (goudrons). Processing comprises separation of shale into two products: concentrate of combustible part containing 70-90% organic mass and concentrate of noncombustible part containing 80-90% calcium carbonate with a small admixture of magnesium carbonate. Concentrate of combustible part in the form of organic mass with residual shale oil fractions or crude oil residues is subjected thermal dissolution at temperature up to 430^°C to give light liquid products and solid residue having softening temperature above 90^°C. In this case, another solvent is used, namely petroleum goudrons, whereas noncombustible part concentrate is processed into cement according to conventional technology. Concentrate of organic mass of concentrated shale is dissolved on heating at solvent-to-concentrated shale weight ratio (1-30):1 for 0.25 to 1 h.

EFFECT: increased yield of light petroleum products.

2 cl, 1 dwg, 1 tbl, 9 ex