Verfahren zur Reinigung von Bisphenol

Prodn. of Bisphenol A (BPA) with a purity of more than 99.95 wt% and a Hazen colour no. of less than 5 from the soln. obtd. by reaction of acetone and phenol in presence of sulphonic acid ion exchange resins (opt. modified with mercaptoamines and/or thiazolidines and/or thiocarboxylic acids) is new....

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Hauptverfasser:	OSSELAER, TONY VAN. DR., BELSELE, BE, MEURER, KURT-PETER. DR., 51375 LEVERKUSEN, DE, WULFF, CLAUS. DR., 47800 KREFELD, DE, VERHOEVEN, WERNER. DR., HEIDE-KALMTHOUT, BE, HOOFTMAN, IGNACE., KRUIBEKE, BE, HALLENBERGER, KASPAR., 51375 LEVERKUSEN, DE, VAES, JOHAN., KALMTHOUT, BE, EITEL, ALFRED. DR., 41539 DORMAGEN, DE, HERCK, WILLY VAN., BRASSCHAAT, BE, HINZ, JUERGEN. DR., 47800 KREFELD, DE
Format:	Patent
Sprache:	ger
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC CHEMISTRY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	Prodn. of Bisphenol A (BPA) with a purity of more than 99.95 wt% and a Hazen colour no. of less than 5 from the soln. obtd. by reaction of acetone and phenol in presence of sulphonic acid ion exchange resins (opt. modified with mercaptoamines and/or thiazolidines and/or thiocarboxylic acids) is new. The process comprises (a) adjusting the concn. of the phenolic soln. to 10-40 wt.% p,p-BPA at 60-80 degrees C, (b) transferring the opt. inertised soln. to a series of 4 columns for (c) removal of water and residual acetone, and opt. phenol, by distn., (d) concn. to 70-97 wt% p,p-BPA at the bottom of the second column, (e) purification by removing high-boiling and non- volatile components and (f) sepn. of entrained low-boiling components and residual phenol, and (g) working up the p,p-BPA melt from the bottom of column 4 in the usual way.