Column for concentration of phthalic anhydride, with vertical wall dividing first stage for removing low-boiling material and second stage for separating high-boiling material, has connection between sumps of both stages

Column for concentration of phthalic anhydride (I) has 2 distillation stages. Low-boiling material in crude (I) is distilled off in the first stage and high-boiling material is separated in the second. The 2 distillation stages are adjacent to one another and separated completely by a vertical wall....

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Hauptverfasser:	GUTERMUTH, THOMAS, DOMES, HELMUTH
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS CHEMISTRY HETEROCYCLIC COMPOUNDS METALLURGY ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TRANSPORTING
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