METHOD FOR DETERMINING ASPHALTENES CONTENT IN OIL AND ITS REFINING PRODUCTS Russian patent published in 2022 - IPC G01N33/22 G01N25/14 

FIELD: analytical chemistry.

SUBSTANCE: invention relates to analytical chemistry, namely to methods for determining the content of asphaltenes in oil and oil products and can be used in laboratories of oil producing and oil refining companies, oil and oil products pipeline transport companies, research laboratories. The method involves weighing and mixing the oil product to be studied or the distillation residue of fractionated oil with isopropyl alcohol in a volume ratio of 1:2 with the addition of the Nefras solvent to the reaction mixture immediately after this treatment in an amount that provides the ratio between the initial sample and the solvent equal to 1:4 by volume. Then the resulting solution is settled in a place protected from light, the undissolved precipitate remaining on the filter is filtered and washed with nefras, the washed precipitate is shed on the filter with hot benzene, washing the dissolved asphaltenes into a pre-weighed flask, the benzene is evaporated, the flask with settled asphaltenes is dried at 105°C in an oven to constant weight and find the content A of asphaltenes according to the formula: where m₁ is the weight of asphaltene sediment; m₂ is the weight of the original sample.

EFFECT: simplification of the method and reduction of its duration, as well as increase in its profitability due to the use of small volumes of inexpensive solvents while increasing the accuracy and reliability of the results obtained.

2 cl, 2 tbl, 10 ex