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METHOD FOR PRODUCTION OF PURE ASPHALTENES DURING DEASPHALTING OF HEAVY CRUDE OILS AND NATURALLY OCCURRING BITUMENS
METHOD FOR PRODUCTION OF PURE ASPHALTENES DURING DEASPHALTING OF HEAVY CRUDE OILS AND NATURALLY OCCURRING BITUMENS
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机译:粗油和天然沥青脱脂过程中生产纯沥青的方法
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FIELD: petroleum processing. SUBSTANCE: heavy crude oils and bitumens are treated with C5-C16-alkanes or gasoline fractions while hydrodynamically affecting crude material by bubbling separated oil-field gas, in particular fireflooding gas, at flow rate 50 to 500 cu.m/min per 1 t crude material. Preliminary treatment reduces water level in crude material to 5 wt %. Then, crude material is deasphalted with 5 to 15-fold volume excess of solvent to give product with 2.8 to 6.2 wt % of occluded adducts when calculated for waterless material. EFFECT: enhanced deasphalting efficiency. 2 tbl, 36 ex
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