PREPARATION OF RELATIVELY PURE P, P-BISPHENOL S - Patent 0495097

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EP 0 495 097 A1

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(43)	Date of publication:
	22.07.1992 Bulletin 1992/30

(21)	Application number: 91919236.0

(22)	Date of filing: 24.06.1991

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International Patent Classification (IPC):

C07C 315/ 00^{( . )}

C07C 317/ 22^{( . )}

(86)	International application number:
	PCT/US1991/004437

(87)	International publication number:
	WO 1992/002493 (20.02.1992 Gazette 1992/05)

(84)	Designated Contracting States:
	AT BE CH DE FR GB IT LI LU NL SE

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Priority:

06.08.1990 US 19900564493

(71)	Applicant: Aristech Chemical Corporation
	Pittsburgh, PA 15230-0250 (US)

(72)	Inventor:
	MULHALL, Steven, E. Pittsburgh, PA 15239 (US)

(74)	Representative: Grünecker, Kinkeldey, Stockmair & Schwanhäusser Anwaltssozietät
	Maximilianstrasse 58 D-80538 München D-80538 München (DE)

(54)	PREPARATION OF RELATIVELY PURE P, P-BISPHENOL S