METHOD OF PRODUCING AND CLEANING PYROMELLITIC ANHYDRITE

METHOD OF PRODUCING AND CLEANING PYROMELLITIC ANHYDRITE

FIELD: chemical engineering. ^ SUBSTANCE: method comprises step-by-step oxidizing of durol up to pyromellitic acid by oxygen in acetic acid environment at high temperature and pressure in the presence of salts of heavy metals and haloid compositions and subsequent cleaning the solution produced by m...

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Hauptverfasser: NAZIMOK VLADIMIR FILIPPOVICH, KUDASHOV ALEKSANDR ANATOL'EVICH, NAZIMOK EKATERINA NIKOLAEVNA, TARKHANOV GENNADIJ ANATOL'EVICH, GONCHAROVA NADEZHDA NIKOLAEVNA
Format: Patent
Sprache:eng ; rus
Schlagworte:
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
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Beschreibung
Zusammenfassung:FIELD: chemical engineering. ^ SUBSTANCE: method comprises step-by-step oxidizing of durol up to pyromellitic acid by oxygen in acetic acid environment at high temperature and pressure in the presence of salts of heavy metals and haloid compositions and subsequent cleaning the solution produced by means of hot filtering and solidification. ^ EFFECT: improved method. ^ 2 dwg, 2 tbl, 18 ex