METHOD AND INSTALLATION FOR FIXED BED CONVERSION OF HEAVY PETROLEUM FRACTIONS WITH INTEGRATED PRODUCTION OF MIDDLE DISTILLATES WITH A VERY LOW SULPHUR CONTENT

摘要

the present invention relates to a process and an installation for treatmenta loadheavy oil of which at least 80% by weight has a higher boiling pointin 340u00b0c.process includes the following steps:(a) in a fixed bed reactor hydroconversion operating currentinfluence ofthe liquid and gas, the conversion products boiling below net360u00b0c is10 to 99% w / w;(b) separation of the effluent from the step (a) with a gas containinghydrogen andh2s, a fraction comprising the oil and possibly lessheavythe diesel and a naphtha fraction.(c) in contact with at least a hydrotreating catalyst at leastfractionwith the oil obtained in step (b);(d) separation of the effluent obtained from the step (c) in a gascontainerhydrogen and at least one fuel with a sulphur content in hairless than 50 ppm, preferably less than 20 ppm, and morepreferredless than 10 ppm.the step (a) is carried hydroconversion pressure p1 and the stagehydrotreating(c) conduct at a pressure p2, the difference of pn = p1-p2 isa minimum of 2mpa.the hydrogen supply to the steps (a) and hydroconversion(c) hydrotreatingthrough a unique system of compression of n stages.