Process for the production of hydrocarbon fluids having a low aromatic content
View Patent ↗The invention provides a process for hydrogenating a low-sulphur feed into very low sulphur and very low aromatic hydrocarbon fluids having a boiling range in the range of from 100 to 400° C. and a boiling range of not more than 80° C., comprising the step of catalytically hydrogenating said feed at a temperature from 80 to 180° C. and at a pressure from 60 to 160 bars.
1. Process for hydrogenating a low-sulphur feed containing less than 15 ppm sulphur, into very low sulphur and very low aromatic hydrocarbon fluids containing less than 5 ppm sulphur and having a content in aromatics below 100 ppm, boiling in the range of from 100 to 400° C. and having a boiling range of not more than 80° C., comprising the step of catalytically hydrogenating said feed at a temperature from 80 to 180° C. and at a pressure from 60 to 160 bars, in two or three hydrogenation stages with a nickel-containing catalyst.
2. Process of claim 1 , wherein the fluids contain less than 50 ppm aromatics.
3. Process of claim 1 , wherein the fluids are boiling in the range 150 to 400° C.
4. Process of claim 1 , wherein the fluids have a boiling range below 75° C.
5. Process of claim 1 , wherein the fluids have a sulphur content of less than 3 ppm sulphur.
6. Process of claim 1 , wherein the liquid hourly space velocity (LSHV) is from 0.2 to 5 hr 1 .
7. Process of claim 1 , wherein the treat rate is from 100 to 300 Nm 3 /ton of feed.
8. Process of claim 1 , wherein the catalyst comprises a nickel supported catalyst.
9. Process of claim 1 , wherein the temperature is below 180° C. and the pressure is above 60 bars.
10. Process of claim 1 , comprising three hydrogenation stages.
11. Process of claim 10 , wherein the amount of catalyst in the three hydrogenation stages is according to a weight percent scheme 5%-50%/10%-70%/25%-85%.
12. Process of claim 11 , wherein the amount of catalyst in the three hydrogenation stages is according to a weight percent scheme 7% -25%/15%-35%/40%-78%.
13. Process of claim 1 , comprising two hydrogenation stages.
14. Process of claim 13 , wherein the amount of catalyst in the two stages, according to a weight percent scheme of 5%-50%/50%-95%.
15. Process of claim 14 , wherein the amount of catalyst in the two stages according to a weight percent scheme of 7%-40%/60%-93%.
16. Process of claim 10 , wherein the first stage is carried out in a trap reactor.
17. Process of claim 1 , wherein the low-sulphur feed contains less than 8 ppm sulphur.
18. Process of claim 1 , wherein the low-sulphur feed contains less than 70% aromatics.
19. Process of claim 1 , wherein the low-sulphur feed contains more than 20% aromatics.
20. Process of claim 1 , wherein the low-sulphur feed is hydrocracked vacuum gas oil, optionally in admixture with FCC effluents and/or hydrotreated atmospheric distillate.
21. Process of claim 1 , further comprising a separation stage, whereby unreacted hydrogen is recovered and a stream of hydrogenated product is recovered.
22. Process of claim 21 , wherein the unreacted hydrogen is recycled at least in part, to the inlet of the process.
23. Process of claim 21 , wherein the stream of hydrogenated product is recycled at least in part, to the inlet of the process.
24. Process of claim 21 , wherein the separation stage comprises three separators staged according to decreasing pressure.
25. Process of claim 24 , wherein the pressure in the last separator is about atmospheric pressure.
26. Process of claim 1 , further comprising a step of prefractionation of the low-sulphur feed prior to hydrogenation, into low-sulphur feed fractions having a boiling range of less than 90° C., then subjected to hydrogenation.
27. Process of claim 1 , further comprising a step of fractionation of the hydrogenated products into fluids of defined boiling ranges.
28. Process of claim 27 , wherein the fractionation step is carried out at a vacuum pressure from 10 to 50 mbars absolute.
29. Process of claim 1 , wherein the fluids thus produced have:
a naphthenic content below 65% wt; and/or
a polynaphthenic content below 40% wt and/or;
a paraffinic content above 30% wt; and/or
an isoparaffinic content above 25% wt.
30. A product comprising a hydrocarbon fluid:
having an initial boiling point above 300° C.,
containing less than 5 ppm sulphur,
having a content in aromatics below 100 ppm, and
having a boiling range of not more than 80° C.,
prepared by the process of claim 1 , wherein the product is selected from the group consisting of drilling fluids, industrial solvents, coating fluids, explosives, concrete demoulding formulations, adhesives, printing inks, metal working fluids, cutting fluids, rolling oils, EDM fluids, rust preventive in industrial lubricants, extender oils, sealants or polymers formulation with silicone, viscosity depressants in plasticised polyvinyl chloride formulations, resins, crop protection fluids, pharmaceutical products, paint compositions, polymers used in water treatment, paper manufacturing or printing pastes and cleaning solvents.
31. Process of claim 13 , wherein a first said stage is carried out in a trap reactor.