METHOD FOR SIMULATION OF TECHNOLOGICAL PROCESSES OF ALKALI-FREE CATALYTIC PURIFICATION OF OIL FROM HYDROGEN SULPHIDE AND MERCAPTANS Russian patent published in 2025 - IPC C10G27/04 

FIELD: chemistry.

SUBSTANCE: invention relates to a method for simulating the process of purifying raw materials from hydrogen sulphide and mercaptans. Method includes stages of initial oil supply, its heating, mixing with catalyst, deactivation of active sulphur compounds, degassing and removal of purified oil. At that, the method is characterized by the fact that initial oil is supplied to a mobile installation for simulation of technological processes of non-alkaline catalytic purification of oil from hydrogen sulphide and mercaptans by means of its connection to the oil pipeline of the enterprise, samples of the initial oil are taken, heating is performed in the recuperative heat exchanger of the technical unit of the mobile plant, simultaneously by means of the control system of the mobile plant the temperature of the heat exchanger is controlled, mixing is carried out by adding air and a catalyst in liquid form to the initial oil, based on the use of metal compounds for alkaline-free purification of the crude oil, at each separate stage of the oil treatment process simulation, mixing is carried out in a centrifugal homogenizer pump and/or an ejector, and/or a diaphragm mixer, which form a mixing unit, deactivation of active sulphur compounds from obtained product mixture is carried out in reaction zone, which is a straight section of pipe, at that, before and in the reaction zone itself, samples are taken, depending on the temperature of the product mixture, a route of its movement is plotted by directing its flow into a separator, into an external pipe of a recuperative heat exchanger and/or into an air cooling apparatus and a buffer tank. Before removal of purified oil from the process unit of the mobile unit, samples are taken. Obtained sampling results, containing data on the concentration of hydrogen sulphide and ethyl-methyl mercaptans, are analysed and compared with the sampling results for all the individual simulation steps, result of comparison is determination of optimum oil treatment process and installation of necessary equipment used in implementation of this mode, further, industrial testing of the selected oil refining process is carried out by means of the previously defined equipment included in the said mobile installation to confirm the stability of the refining results.

EFFECT: enabling simulation of technological processes of alkali-free catalytic purification of oil from hydrogen sulphide and mercaptans directly at production with possibility of further implementation of the purification method at an industrial plant.

4 cl, 3 dwg, 1 tbl