HIGH-SULPHUR SLATE THERMAL PROCESSING METHOD Russian patent published in 2009 - IPC C10B53/06 C07D333/06 

FIELD: chemistry.

SUBSTANCE: method involves drying crushed slate, thermal decomposition using solid heat carrier obtaining a vapour-gas mixture, removal of mechanical impurities from the latter, extraction resin fractions with boiling point above 175°C from the vapour-gas mixture, cooling the remaining vapour-gas mixture with its division into low-temperature coking gas, pyroligneous liquor and a gasoline fraction with boiling point below 175°C, distillation of the latter with successive extraction of three fractions with boiling points 79 to 90°C, 90 to 116°C and 116 to 145°C, extractive rectification of each of the three fractions in the presence of the same solvent - mixture of N-formylmorpholine and propylenecarbonate with subsequent extraction of thiophene, methylthiophenes and dimethyl-thiophenes from each fraction, respectively.

EFFECT: design of a method for thermal processing high-sulphur slate, which allows for obtaining valuable target chemical substances from the thiophene family, with cost effective and efficient processing of high-sulphur slate.

1 dwg, 3 ex