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Title:
APPARATUS FOR SEPARATION AND PURIFICATION OF CONJUGATED DIENE AND SEPARATION AND PURIFICATION METHOD
Document Type and Number:
Japanese Patent JP2005350475
Kind Code:
A
Abstract:

To provide an apparatus for the extractive distillation of a conjugated diene suppressing the formation of polymers in the extractive distillation apparatus to decrease the staining in the apparatus, clogging of piping, lowering of thermal efficiency and damage to the connection part of pipes, etc.

The invention discloses (1) a method to introduce a polymerization inhibitor into a dead space in a pipe, a column or a heat-exchanger in a method for the separation and purification of a conjugated diene by the distillation of a petroleum fraction containing the conjugated diene and (2) a method to introduce a polymerization inhibitor into a dead space in a pipe, a column or a heat-exchanger in a method for the separation and purification of a conjugated diene by the extractive distillation of a petroleum fraction containing the conjugated diene followed by the separation and purification of a compound having a boiling point higher or lower than that of the conjugated diene by distillation.


Inventors:
KAJI MASAYOSHI
KANOUCHI MASANOBU
Application Number:
JP2005000185928
Publication Date:
December 22, 2005
Filing Date:
June 27, 2005
Export Citation:
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Assignee:
NIPPON ZEON CO
International Classes:
C07C7/05; C07C7/20; C07C11/167; (IPC1-7): C07C7/05; C07C7/20; C07C11/167