Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Reexamination Certificate
2009-10-13
2011-10-04
Witherspoon, Sikarl (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
C568S798000
Reexamination Certificate
active
08030525
ABSTRACT:
A method for producing phenol and acetone in a multi-stage process at an elevated temperature from a cumene hydroperoxide mixture comprising cumene, the method comprising the steps of a) reacting the cumene hydroperoxide mixture with a 2-hydroxybenzenesulfonic acid catalyst having a concentration of 0.1 to 1 mmol/L acid catalyst to form a second mixture comprising phenol, acetone and dicumyl peroxide in a first stage and decomposing the second mixture in a second stage to produce a third mixture comprising phenol and acetone.
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Dykman Arkady Samuilovich
Grebenshchikov Ilja Nikolayevich
Nelson Mark E.
Pinson Victor Vladimirovich
Zhukov Dmitrij Nikolayevich
Hofmeister Todd S.
Jenny Paul A.
Michael & Best & Friedrich LLP
Sabic Innovative Plastics IP B.V.
Witherspoon Sikarl
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