PROCEDURE AND INSTALLATION FOR CONVERSION OF HEAVY OIL FRACTIONS IN BOILING LAYER BY INTEGRATED PRODUCTION OF MIDDLE DISTALLATE WITH EXTREMLY LOW SULPHUR CONTENTS Russian patent published in 2011 - IPC C10G65/12 C10G47/24 

FIELD: oil and gas production.

SUBSTANCE: invention refers to procedure and installation for processing heavy oil raw stock wherein at least 80 wt % of compounds have temperature over 340°C. The procedure consists in the following stages: (a) hydraulic conversion in a reactor with a boiling layer of catalyst operating on a rising flow of liquid and gas at temperature 300- 500°C with conversion 10-98 wt % of a fraction having boiling temperature above 540°C; (b) division of exit flow after stage (a) into gas containing hydrogen and H₂S, a fraction including benzene and, not necessarily, a fraction heavier, than the benzene fraction and the fraction of naphtha; c) hydrofining by contacting at least one catalyst and at least one fraction including benzene produced at stage (b); d) division of exit flow after stage (c) into gas containing hydrogen and at least one benzene fraction with contents of sulphur below 50 p/mln, preferably less, than 20 p/mln and more preferably less, than 10 p/mln. Stage of hydro-conversion (a) is performed at pressure P1 and stage of hydrofining (c) is performed at stage P2; difference ΔP=P1-P2 amounts to at least 3 MPa. Hydrogen is supplied at stage of hydro-conversion (a) and hydrofining (c) by means of one system of hydrogen compression with n steps.

EFFECT: reduced expenditures at maintaining rational duration of cycle of catalytic hydrofining, reduced content of sulphur.

37 cl, 2 ex, 2 dwg