A PROCESS FOR PRODUCING LIGHT OLEFINS BY CATALYTIC CONVERSION OF HYDROCARBONS

摘要

A PROCESS FOR PRODUCING LIGHT OLEFINS, ESPECIALLY ETHYLENE, PROPYLENE, ISOBUTYLENE AND ISOAMYLENE, TOGETHER WITH HIGH OCTANE GASOLINE AS BY-PRODUCT, COMPRISES THAT PETROLEUM HYDROCARBONS ARE CONTACTED WITH PHOSPHORUS AND RARE EARTH CONTAINING HIGH SILICA ZEOLITE HAVING A STRUCTURE OF PENTASIL CATALYST AND CATALYTICALLY CONVERTED AT A TEMPERATURE OF 480° TO 680° C AND A PRESSURE OF 1.2X105 TO 4.0X105PA, WITH A CONTACT TIME OF 0.1 TO 6 SECONDS, A WEIGHT RATIO OF CATALYST TO FEEDSTOCK OF 4:1 TO 20:1 AND A WEIGHT RATIO OF STEAM TO FEEDSTOCK OF 0.01:1 TO 0.5:1.