Addition of mineral acids or salts thereof to a TMA production process

Addition of mineral acids or salts thereof to a TMA production process

本发明涉及1，2，4-苯三酸酐(TMA)的生产。更具体地说，本发明涉及在偏苯三酸酐生产过程中加入无机酸或其盐以减少当TMA通过精馏进行精制时塔底馏分的粘度，从而防止污染/堵塞。该方法可在塔底馏分中使用较少量的TMA，并增加TMA的回收率。 This invention is related to the production of trimellitic anhydride (TMA). More specifically, the invention is related to the addition of a mineral acid or salt thereof in the pro...

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Bibliographische Detailangaben
1. Verfasser: CEREFICE STEVEN A.,YOUNG DAVID A.,SCHAMMEL WAYNE P
Format: Patent
Sprache:chi ; eng
Schlagworte:
ACYCLIC OR CARBOCYCLIC COMPOUNDS
APPARATUS THEREFOR
CHEMISTRY
GENERAL METHODS OF ORGANIC CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
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Beschreibung
Zusammenfassung:本发明涉及1，2，4-苯三酸酐(TMA)的生产。更具体地说，本发明涉及在偏苯三酸酐生产过程中加入无机酸或其盐以减少当TMA通过精馏进行精制时塔底馏分的粘度，从而防止污染/堵塞。该方法可在塔底馏分中使用较少量的TMA，并增加TMA的回收率。 This invention is related to the production of trimellitic anhydride (TMA). More specifically, the invention is related to the addition of a mineral acid or salt thereof in the production process of trimellitic anhydride to reduce the viscosity of the bottoms fraction when TMA is purified by distillation and thus to prevent fouling/plugging. This permits the use of lower levels of TMA in the bottoms fraction and increases TMA recovery.