APPARATUS FOR LIQUID-PHASE SYNTHESIS OF ISOPRENE Russian patent published in 1996 - IPC

FIELD: production of synthetic rubber, particular, design of the apparatus for the process of isoprene synthesis based on isobutylene and formaldehyde by single- stage method. SUBSTANCE: apparatus for liquid-phase synthesis of isoprene has successively joined airlift and shell-and-tube column with devices located in lower part of each column and intended for distribution or reaction medium. Airlift column has uptaking section in form of tube bundle whose intertubular space serves as down section. Distributing device is located under tube bundle and presents a header with nozzles branching out of it. Shell-and-tube column has external recirculating circuit which connects the upper separating and the lower reaction zones. Additional separating chambers are built in the recirculating circuit. Distributing device is made in form of turned over plate with branch pipes branching down from it. EFFECT: higher efficiency. 3 cl, 3 dwg