Organic compounds -- part of the class 532-570 series – Organic compounds – Halogen containing
Reexamination Certificate
2006-03-14
2006-03-14
Witherspoon, Sikarl A. (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Halogen containing
C570S208000
Reexamination Certificate
active
07012166
ABSTRACT:
Aromatic compounds such as toluene and o-xylene are chlorinated in the presence of a catalyst combination prepared by combining (A) at least one salt comprising a metal selected from the group consisting of a Group 4–12 metal, a lanthanide and an actinide; and a counterion; and (B) at least one organic sulfur compound, preferably phenothiazine-N-carbonyl chloride. The catalyst combination may include reaction products of (A) and (B). Under these conditions, production of the p-chloro isomer is optimized. In some embodiments said counterion is an organic counterion derived from at least one acidic organic compound selected from the group consisting of those with an approximate pKa value relative to water of at least about 3.
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Colborn Robert Edgar
Hancu Dan
Kilmer Richard Joseph
Caruso Andrew J.
General Electric Company
Powell, III William E.
Witherspoon Sikarl A.
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