COUPLING THE DISTILLATIVE PURIFICATION WITH A PARTIAL CAPACITOR FOR PRE-PURIFICATION OF ISOPHORONDIAMINE

A process for fine purification of isophoronediamine (IPDA), including producing IPDA by aminating hydrogenation of isophorone nitrile in the presence of at least ammonia, hydrogen, a a hydrogenation catalyst and optionally further additions to obtain a crude IPDA, and subjecting the crude IPDA to a...

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Bibliographic Details
Main Authors RÜFER, Alexander Martin, WALSCHARTS, Jorn, STREUKENS, Guido, KOHLSTRUK, Stephan, HENGSTERMANN, Axel, MENDORF, Matthias, MÜLLER, Anja, RITTSTEIGER, Anne, ORSCHEL, Matthias
Format Patent
LanguageEnglish
French
German
Published 04.07.2018
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
TRANSPORTING
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Summary:A process for fine purification of isophoronediamine (IPDA), including producing IPDA by aminating hydrogenation of isophorone nitrile in the presence of at least ammonia, hydrogen, a a hydrogenation catalyst and optionally further additions to obtain a crude IPDA, and subjecting the crude IPDA to a fine purification via two vacuum distillation columns, wherein in the first vacuum distillation column the removal of any remaining relatively low-boiling byproducts is effected and in the second vacuum distillation column the IPDA is obtained in pure form as tops and thus separated from the organic residues, and wherein the first vacuum distillation column has vacuum distillation column has a partial condenser fitted to it.
Bibliography:Application Number: EP20160165898