Process Description Feedstock - naphtha is heated in recuperative heat exchanger 1 and heater 2 and sent to reactor 3 with a catalyst layer heated by flue gases coming from furnace 5. Reaction products are cooled in recuperative heat exchanger 1, and separated in distillation unit 4 into stable high-octane gasoline and LPG. Refrigerant is formed by burning fuel and regeneration gas in furnace 5. Regeneration gas is produced by oxidation regeneration of catalyst in reactor 6 by purging catalyst with oxygen-rich gas. To ensure process continuity, one of the reactors is in the reprocessing stage and the other is in the regeneration stage.
Process features
Low capital investment and operating costs
Fixed bed of catalyst
Predominant course of isomerization reactions
Hydro treatment with native hydrogen released during the aromatization of feed hydrocarbons
Reduction of benzene content below 1% due to alkylation with native olefins
Formation of non-condensable gases (C1+C2): no more than 0.5 %
Locally produced catalyst
Technical Specification
Feedstock - straight-run fractions NK-165/210 (up to 400 °C)
Reaction temperature: 390-450 °C, pressure: 1,0-1,5 MPa, volumetric velocity: 2-2,5 h' (up to 4)
Single-pass lifespan of catalyst is at least 400 hours.
Oxidation regeneration without catalyst unload (20-25 regenerations per year)
Gasoline ONRM: 92-95
Gasoline recovery: 75-80 %. LPG recovery 20-25 %
Patents of the Russian Federation No. 2443755, 2565294, 2568809.
Development level, industrial application
Basic design of plant with feed capacity of 140,000 tons/y has been developed