METHOD FOR PRODUCTION OF OLEFIN HYDROCARBONS Russian patent published in 2005 - IPC

FIELD: petroleum chemistry.

SUBSTANCE: olefin hydrocarbons are obtained by dehydration of paraffin hydrocarbons in presence of catalyst. Claimed method includes: preparation of mixture from direct and recycled paraffin hydrocarbon streams; vaporization; vapor heating; and overheating in oven before feeding into reactor; cooling of contact gas in disposal boiler and scrubber with water by using two circulating contours with different water temperature and air cooling of water; followed by tree-step contact gas compression with intermediate condensation; condensation; absorption of uncondensed hydrocarbons; and recovery of paraffin-olefin cut by fractionation of obtained hydrocarbon condensate. Temperature of contact gas fed into compression is stabilized on predetermined level by alteration of contact gas temperature on wet scrubber input and temperature of circulating water fed into top of wet scrubber, while said circulating water is cooled in one or two steps according to contact gas temperature on wet scrubber input; and circulating water temperature is changed either using or without air cooling.

EFFECT: decreased losses of raw material and catalyst, increased utilization coefficient of contact gas heat, and improved process stabilization.

2 cl, 1 dwg, 10 ex