METHOD OF CLEANING HYDROCARBON RAW MATERIALS Russian patent published in 2017 - IPC C10G67/06 C10G25/00 C10G53/16 C10G53/08 B01D15/14 B01D15/18 

FIELD: chemistry.

SUBSTANCE: invention relates to a process of purifying a hydrocarbonaceous feedstock containing impurities in which the following steps are simultaneously performed: a) treating in a liquid phase a hydrocarbon feedstock in a first adsorption unit comprising first and second adsorption towers (1, 2) filled respectively with first and second solid adsorbent. The first and second adsorption columns (1, 2) operate in parallel and alternately in adsorption and regeneration modes. The mentioned hydrocarbon feedstock is introduced into the first adsorption column (1) and brought into contact with the first solid adsorbent, and a stream of hydrocarbons depleted of impurities is withdrawn at the outlet of the first adsorption tower (1); B) treating the secondary liquid hydrocarbon feedstock that consists of either the hydrocarbon feedstock fraction or the fraction of the impoverished hydrocarbon stream in the treatment plant (3, 4, 22, 24), and selecting the treated secondary liquid hydrocarbon feed from mentioned treatment unit; C) heating the treated secondary liquid hydrocarbon feed from step b); D) regenerating the second solid adsorbent from the second adsorption column (2) with the secondary hydrocarbon feedstock heated in step c), by contacting mentioned second solid adsorbent, in order to reduce the level of environmental contamination. Step d) is carried out by supplying the mentioned heated secondary hydrocarbon feedstock to a second adsorption column in countercurrent with respect to the hydrocarbon feedstock feed direction to the first adsorption column (1). The treatment plant in step b) comprises a third and fourth adsorption columns (3, 4) containing respectively a third and fourth solid adsorbent. In the third adsorption column (3), a secondary liquid hydrocarbon feed is contacted with a third solid adsorbent to produce a treated secondary liquid hydrocarbon feed. And, the flow comprising impurities coming from the second adsorption column (2) is directed to the fourth adsorption column (4) in order to regenerate the fourth solid adsorbent and divert the flow filled with impurities.

EFFECT: method eliminates the need to supply the regenerating agent from the outside and is more economical due to improved thermal integration.

7 cl, 5 dwg, 9 tbl, 5 ex