METHOD OF EXTRACTION OF AN AROMATIC SOLVENT, BENZOLE, TOLUENE AND A HIGH-OCTANE COMPONENT OF GASOLINE WITH IMPROVED ECOLOGICAL CHARACTERISTICS FROM CATALYSATES OF GASOLINE AND BENZOLE-TOLUENE REFORMING Russian patent published in 2005 - IPC

FIELD: petrochemical industry; production of an aromatic solvent, benzole, toluene and a high-octane component of gasoline.

SUBSTANCE: the invention is pertaining to the field of petrochemical industry, in particular, to production of an aromatic solvent, benzole, toluene and a high-octane component of gasoline with the improved ecological characteristics from gasoline and gas-condensate raw stock. The method provides, that the gasoline reforming catalysate is subjected to the fractionation in a rectifying column. In the top of the column they separate a pre-benzole fraction at the rate, at which the potential withdrawal of the non-aromatic hydrocarbons C₃-C₆ with it makes 65-95 mass %. With the help of a side withdrawal they extract a benzole-toluene-xylene fraction at rate, at which the potential withdrawal of the aromatic hydrocarbons C₉ and higher in the fraction makes 2-20 mass %. As a bottoms product of the column they extract the fraction of aromatic hydrocarbons_{С9 and higher. The point for the column side withdrawal chose so, that the temperature difference between this point and the top part of the column is located within the range of 40-80°C. The side-cut distillate of the column is mixed with the catalysate of the benzole-toluene reforming, the produced product is in series subjected to hydrogenation, an extraction with the help of a selective solvent with separation from an extract of a rectified commercial benzole, toluene, an aromatic solvent. The pre-benzole fraction and the fraction of the aromatic hydrocarbons C9 and higher is mixed and in the result produce a high-octane component of gasoline with improved ecological characteristics. The method allows to obtain a high-octane component of gasoline with improved ecological characteristics and also a commercial benzole with a high withdrawal and quality.}

EFFECT: the invention ensures production of a high-octane component of gasoline with improved ecological characteristics and a commercial benzole with a high withdrawal and quality.

7 ex