Rectification method for 1,3-piperlene

• Main Authors: WANG JING, CHENG JIANMIN, LIAO LIHUA, LI YAN, LI DONGFENG, WANG YUFEI
• Format: Patent
• Language: Chinese; English
• Published: 13.04.2016
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; ORGANIC CHEMISTRY; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The present invention discloses a rectification method for 1,3-piperlene. The rectification method comprises the following steps: (1) allowing crude 1,3-piperlene to enter the middle part of a reactive distillation column, collecting distillation components containing 1,3-piperlene, cyclopentane and cyclopentene from the top of the reactive distillation column and distillation components containing dicyclopentadiene and heavier components from the bottom of the reactive distillation column through a reactive distillation process; (2) introducing the distillation components containing 1,3-piperlene, cyclopentane and cyclopentene collected from the top of the reactive distillation column obtained in step (1) into an extraction-distillation column, performing extraction-distillation in the presence of extraction solvents, extracting components containing cyclopentane and cyclopentene from the top of the extraction-distillation column, and extracting solvent materials rich in 1,3-piperlene from the column kettle