Single-crystal – oriented-crystal – and epitaxy growth processes; – Processes of growth from liquid or supercritical state – Having growth from a solution comprising a solvent which is...
Patent
1994-11-10
1996-08-06
Kunemund, Robert
Single-crystal, oriented-crystal, and epitaxy growth processes;
Processes of growth from liquid or supercritical state
Having growth from a solution comprising a solvent which is...
117 73, 117925, 117927, 23295R, C30B 2954
Patent
active
055423728
ABSTRACT:
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.degree.-145.degree. C. The product DMT is thus obtained.
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Su Hong
Sun Xujiang
Wang Tongshun
Xia Hongxia
Zhang Jun
Kunemund Robert
Tianjin Petro-Chemical Corporation
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