METHOD OF PRODUCING CONCENTRATE ENRICHED WITH VANADYL-PORPHYRINS Russian patent published in 1996 - IPC

FIELD: chemical technology. SUBSTANCE: product: petroleum concentrate enriched with vanadyl-porphyrins, extraction degree of product is up to 82.6 wt. -%, product content in concentrate is up to 0.64 wt.-%. Reagent 1: mazut above 350 C from total oil of Tashkent asphalt-bitumen factory. Reagent 2: ferric (3+) chloride as an acetone or ethanol solution. Reaction condition: in benzene medium at the ratio Reagent 2:total oil nitrogen or its residual fraction 0.5-2.0 mole/mole followed by dilution of reaction mixture with n-hexane at the dilution ratio 20-40 ml/g, separation of precipitate formed, washing with water, dissolving in chloroform, drying and evaporation under vacuum. Concentrate is used as photosensitive material. EFFECT: improved method of production. 1 tbl