Novel purification process

United States of America Patent

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Feb 12, 1991
Grant Date
N/A
app pub date
Dec 13, 1989
filing date
Dec 19, 1988

priority date (Note)
Expired

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Abstract

Crude phenol and also individual phenol fractions from tars or the hydrogenation of coal are purified from contaminating organic bases and sulfur compounds by treating the phenols with phthalic acid anhydride and optionally a quinone and distillation.

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Patent Owner(s)

Patent Owner	Address
RUTGERSWERKE AKTIENGESELLSCHAFT A CORP OF FED REPUBLIC OF GERMANY	Not Provided

International Classification(s)

C07C:ACYCLIC OR CARBOCYCLIC COMPOUNDS

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[Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Bergins, Wolfgang	Castrop-Rauxel, DE	3	0
Stolzenberg, Konrad	Waltrop, DE	4	10
Talbiersky, Jorg	Dorsten, DE	6	2
Wefringhaus, Bernhard	Castrop-Rauxel, DE	1	0

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Novel purification process

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United States of America Patent

07450050

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PATENT NO	4992599
SERIAL NO	07450050
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07450050

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