METHOD FOR PRODUCING DIISOBUTYLENE USING MIXED C4 FRACTION AS RAW MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a high-purity diisobutylene in high reaction selectivity by bringing a mixed C4 fraction into contact with a polymerization catalyst to conduct oligomerization reaction of isobutene by one-stage reaction.

SOLUTION: The method for producing the diisobutylene by bringing the raw mixed C4 fraction into contact with a solid acid catalyst includes: a step (a) for an oligomerization reaction of isobutene; a step (b) for distillation to separate an unreacted C4 fraction and an oligomer fraction including a generated C8 fraction; and a step (C) for distillation to purify the diisobutylene in the C8 fraction. In the step (a), the conversion rate of the isobutene in the mixed C4 fraction is controlled to a range of 60-95%.

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