| 摘要 |
PURPOSE:To separate and to recover the titled compound from a specific by- product cracked petroleum advantageously, by separating <=5C fraction from >=9C fraction under dimerization condition of the titled compound and under cracking condition of the titled compound by distillation and separating 6C-8C fraction by distillation. CONSTITUTION:A by-product cracked petroleum 11 containing >=5C fraction prepared as a by-product in production of olefins by thermal cracking of liquid hydrocarbon is fed to a first distillation column 1 and distilled at <=150 deg.C bottom temperature of the column to give <=5C fraction 12 from the top of the column and >=6C fraction 13 from the bottom of the column. Then, the >=6C fraction is fed to a second distillation column 2 and distilled at >=160 deg.C bottom temperature of the column to give >=9C fraction 15 from the bottom of the column and a distillate solution 14 containing the titled compound and 6-8C fraction from the top of the column. The distillate solution is further distilled by a third distillation column 3 to give 6-8C fraction 17 from the bottom of the column and the titled high-purity compound useful as a raw material for synthetic resin, agricultural chemicals, drugs, etc., from the top of the column by relatively simple operations and efficiently.
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