Process and a system for production of multiple grade de-aromatized solvents from hydrocarbon streams

A process for producing a plurality of ultra-low aromatic chemicals from a plurality of low value hydrocarbon streams, the process comprising:

• subjecting a hydrocarbon feedstock-1 to a first hydrotreating in a first reactor unit, wherein the hydrocarbon feedstock-1 is doped with 50-500 ppmw of a nitrogen compound, wherein the first reactor unit is loaded with a dual functional catalyst system, wherein the dual functional catalyst system is capable of desulfurization and hydrogenation, wherein the first hydrotreating provides a first effluent;
• wherein sulphur content in the first effluent is below 2 ppmw;
• maintaining a Weighted Average Bed Temperature (WABT) between 250° C. and 350° C., a hydrogen partial pressure between 35-75 bar g, a liquid hourly space velocity (LHSV) in a range of 0.5-1.5−1, a gas to oil ratio in a range of 300-800 Nm3/m3 in the first reactor unit;
• stripping the first effluent in at least one stripper unit to remove at least one dissolved gas from the first effluent to provide a stripper effluent, wherein H2S content in the stripper effluent is below 0.05 ppmw;
• mixing the stripper effluent with a hydrocarbon feedstock-2 to form a combined stream-1, wherein the hydrocarbon feedstock-2 has a boiling range between 100° C.-220° C., an iso-paraffin content between 50 wt %-80 wt %, and a naphthenic content between 20 wt %-50 wt %, wherein, sulphur and aromatic content of the hydrocarbon feedstock-2 is lower than the sulphur and aromatic content of the first effluent;
• subjecting the combined stream-1 to a second hydrotreating in a second reactor unit, wherein the second reactor unit is loaded with a hydrogenation catalyst system having aromatic saturation properties, wherein the second hydrotreating provides a second effluent;
• maintaining a WABT between 150° C. and 250° C., a hydrogen partial pressure between 25-65 bar g, an LHSV in a range of 0.2-1.5−h, a gas to oil ratio in a range of 250-900 Nm3/m3 in the second reactor unit;
• mixing the second effluent of the second reactor with Feedstock-3 to form a combined stream-2, wherein the hydrocarbon Feedstock-3 has a boiling range between 65° C.-160° C., an iso-paraffin content between 50 wt %-80 wt %, wherein, sulphur and aromatic content of the hydrocarbon Feedstock-3 is lower than the second effluent;
• subjecting the combined stream-2 to an adsorption unit, wherein the aromatic molecules are selectively adsorbed from the combined stream-2 enriching it with paraffin, iso-paraffin and naphthenic molecules wherein the selective adsorption is based on a difference in a polarity of molecules to result in a third effluent from the adsorption unit;
• subjecting the third effluent from the adsorption unit to a distillation unit to separate out the plurality of ultra-low aromatic chemicals from the third effluent by distillation.