METHOD FOR OBTAINING HYDROCARBON SOLVENTS WITH A BOILING TEMPERATURE EXCEEDING 300 ° C AND A TEMPERATURE TEMPERATURE LESS THAN OR EQUAL -25 ° C

摘要

The method of obtaining hydrocarbon solvents with a sulfur content of less than 10 million, with an aromatic content less than 500 million, with an initial boiling point greater than or equal to 300 ° C, and with a final boiling point less than or equal to 500 ° C, with a boiling range of not more than 100 ° C, and the method contains the steps of dewaxing the hydrocarbon fraction, the boiling point of which exceeds 300 ° C and which comes after the distillation of the gas oil fraction; hydrodearomatization of all or part of the dewaxed stream in the presence of a catalyst containing nickel on alumina base at a pressure in the range from 6.0 to 20.0 MPa and at a temperature in the range from 80 to 250 ° C; separation of the dewaxed and dearomatised fraction; distillation of the dewaxed and de-aromatized fraction into fractions; the allocation of at least one fraction "300 ° C +" with a temperature of fluidity less than -25 ° C, and this fraction has a boiling range of less than 100 ° C.