PROCESS TO PURIFICATE CYCLOHEXANE MIXTURE INCLUDING BUTADIENE, METHYL ALCOHOL, TETRAHYDROFURAN

摘要

A method for purifying a cyclohexane mixture containing butadiene, methyl alcohol, tetrahydrofuran and water is provided to realize high purity of a recovered product and high purification efficiency and cost efficiency. A method for purifying a cyclohexane mixture containing butadiene, methyl alcohol, tetrahydrofuran and water comprises the steps of: preheating the mixture at 90-100 deg.C, introducing the preheated mixture into a distillation tower(10), carrying out distillation at 105-115 deg.C, carrying out condensation at 40-50 deg.C, removing water via interlayer separation, and refluxing 95-99 wt% of the resultant product to separate a mixture containing butadiene, methyl alcohol, water and tetrahydrofuran from cyclohexane; preheating the mixture obtained from the preceding step at 30-50 deg.C, introducing the preheated mixture into a distillation tower(20), carrying out distillation at 80-90 deg.C, carrying out condensation at 10-20 deg.C, removing water via interlayer separation, and refluxing 95-99 wt% of the resultant product to separate a mixture containing butadiene, methyl alcohol and water from tetrahydrofuran; and introducing the mixture obtained from the preceding step into the bottom of a distillation tower(30) at 30-40 deg.C, adding water to the top of the distillation tower at 25-35 deg.C, and carrying out distillation to separate a mixture containing methyl alcohol and water from butadiene.