FIELD: process engineering.
SUBSTANCE: invention relates to main organic and petrochemical synthesis, namely to production of diene hydrocarbons, isoprene in particular. Proposed method comprises separate feed and heating of flows of isobutylene, formaldehyde and acid catalyst, combining said flows in jet mixer, interaction in tubular reactor and throttling the flow of reaction products through reducing device into evaporator separator. Feeding the flows of isobutylene, formaldehyde and acid catalyst is performed with supercritical pressure of isobutylene. Heating the flows of isobutylene, additionally formaldehyde and, not obligatorily, acid catalyst is performed to temperatures that allows running of chemical interaction reactions in the medium of supercritical isobutylene. Said flows are combined in jet mixer at supercritical pressure of isobutylene, while chemical interaction reaction runs in tubular reactor at supercritical pressure of isobutylene. The flow of reaction products is throttled into evaporator separator through reducing device that maintains required supercritical pressure of isobutylene in tubular reactor reaction zone. Then vapor flow containing, mainly, isoprene is removed from evaporator separator top part, while fluid flow containing mainly acid catalyst is withdrawn from evaporator separator bottom part. Proposed device comprises isobutylene flow feeder 1 and heater 4, formaldehyde flow feeder 2 and heater 5, acid catalyst flow feeder 3, jet mixer 5, tubular reactor 7, reducing device 8 and evaporator separator 9.
EFFECT: higher efficiency due to higher reaction rate.
23 cl, 1 dwg
