Optimization and application of light hydrocarbon co-cracking technology

By using BSPA ethylene feedstock cracking performance evaluation test unit, the co-cracking technology of ethane and propane, the cracking of oil field light hydrocarbon and head oil and naphtha in groups, and the mixed cracking technology with different blending ratio is studied. The results show that the yield of ethylene and diene can be increased by co-cracking of ethane and propane, and the appropriate blending ratio of ethane is not less than 80%. Oil field light hydrocarbon and head oil are suitable for "separate reserve and cracking". If their reserves are not enough and they must be be mixed with naphtha for co-cracking, the blending ratio of oil field light hydrocarbon should be not less than 30%, as far as possible≥70%; the blending ratio of head oil should be not less than 40%, as far as possible ≥70%. The results are applied to industrial ethylene cracking unit, and the remarkable industrial application effect is obtained.