Hydrotreatment of diesel fractions with hydrogenate recirculation
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Process Description Raw material – a homogeneous raw material mixture produced by mixing hydrocarbon raw materials, solvent and HCG. The solvent and HCG are fed as a working stream into the ejector 1. The feedstock is in contact with the catalyst in reactor 2 with a block of heat exchange elements 3 located in the catalyst layer 4. Hydrogenate is discharged from reactor 2 and separated into solvent and balance hydrogenate. The latter's pressure is reduced by means of a throttle valve 5, it is heated in the inner space of the unit of heat exchange elements 3 and separated in the stabilization unit 6 into a commercial product, light hydrocarbon fraction and off-gas.
Process features
Low capital investment and operating costs
It is applicable for hydrotreating kerosene or low-sulfur diesel fractions with total sulfur content up to 0.6% or deep desulfurization of pre-hydrotreated gas oil fractions.
Reduction of catalyst load by 40 %
Reduction of processing costs by 20-30 %
No quenching
Technical Specification
Feedstock - medium hydrocarbon distillates
Feedstock capacity: up to 2 million tons/year
Reaction temparature: 320-340 C, pressure:
3.5-10.0 MPa, Volumetric velocity: 1.5-2.5 h'
Residual total sulfur content: 5-10 mg/kg
Patents of the Russian Federation No. 2495910, 2518103, 2630773, 2630774, 2631290