A METHOD TO OBTAIN VISUALLY PURE BISPHENOL A

A METHOD TO OBTAIN VISUALLY PURE BISPHENOL A

In the method of the invention, the process to obtain bisphenol A from phenol and acetone in the presence of a cation exchanger which is preferably promoted with organic sulphur compounds, is carried out in two steps, while the reaction mixture is made to flow upwards in the reactor. Step I of the c...

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Hauptverfasser: KIEDIK, MACIEJ, MROZ, JERZY, SZYMANSKI, KAZIMIERZ, SMOLNIK, RYSZARD, KOLT, JOZEF, KALEDKOWSKA, MALGORZATA, KOSCIUK, RYSZARD, RZODECZKO, ANNA, KSIAZEK, KRZYSZTOF
Format: Patent
Sprache:eng ; fre ; ger
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ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
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creator KIEDIK, MACIEJ
MROZ, JERZY
SZYMANSKI, KAZIMIERZ
SMOLNIK, RYSZARD
KOLT, JOZEF
KALEDKOWSKA, MALGORZATA
KOSCIUK, RYSZARD
RZODECZKO, ANNA
KSIAZEK, KRZYSZTOF
description In the method of the invention, the process to obtain bisphenol A from phenol and acetone in the presence of a cation exchanger which is preferably promoted with organic sulphur compounds, is carried out in two steps, while the reaction mixture is made to flow upwards in the reactor. Step I of the condensation reaction comprises a preliminary rearrangement phase to obtain an increase in the concentration of bisphenol A by 2 - 15 %, preferably 3 - 5 %, while in Step II the reaction is preferably carried out while removing part of reaction water in a continuous manner. Acetone, water and phenol are then removed from the resulting post-reaction mixture and the crude bisphenol A which is obtained as a residue is treated by distillation or fractional crystallization.
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subjects ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
title A METHOD TO OBTAIN VISUALLY PURE BISPHENOL A
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