Process for purification of DMT by film crystallization

This invention relates to a single crystallization process for purification of dimethyl terephtalate (DMT) by film crystallization, including pumping the raw DMT into a film crystallizer and reducing its temperature to form DMT crystalline on the walls of the crystallizing pipes in the crystallizer,...

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Bibliographic Details
Main Authors ZHANG; JUN, SU; HONG, SUN; XUJIANG, ZHANG; JUNMIN, XIA; HONGXIA, WANG; TONGSHUN
Format Patent
LanguageEnglish
Published 06.08.1996
Edition6
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE
APPARATUS THEREFOR
CHEMISTRY
CRYSTAL GROWTH
METALLURGY
ORGANIC CHEMISTRY
PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE
REFINING BY ZONE-MELTING OF MATERIAL
SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE
SINGLE-CRYSTAL-GROWTH
UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL
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Summary:This invention relates to a single crystallization process for purification of dimethyl terephtalate (DMT) by film crystallization, including pumping the raw DMT into a film crystallizer and reducing its temperature to form DMT crystalline on the walls of the crystallizing pipes in the crystallizer, and then heating the crystallizing pipes and collecting the melt at 140 DEG -145 DEG C. The product DMT is thus obtained.
Bibliography:Application Number: US19940337086