Organic compounds -- part of the class 532-570 series – Organic compounds – Halogen containing
Patent
1990-01-19
1991-03-19
Lone, Werren B.
Organic compounds -- part of the class 532-570 series
Organic compounds
Halogen containing
570206, 570207, C07C 1712, C07C 2508
Patent
active
050012908
ABSTRACT:
A method for producing p-dichlorobenzene using a reactor containing a catalyst/reagent to convert chlorobenzene (or benzene) to p-dichlorobenzene, the reactor having an inlet and an outlet for introducing reactants and removing product; introducing a pulse of gaseous chlorobenzene (or benzene) into the reactor and reacting the chlorobenzene with the catalyst/reagent whereby p-dichlorobenzene is formed; introducing a pulse of inert gas into the reactor; introducing a pulse of gaseous chlorine into the reactor and reacting the chlorine with the catalyst/reagent; introducing a pulse of inert gas into the reactor; repeating the pulsing steps in a sequential manner, whereby mixing of the vaporized benzene or chlorobenzene, and the chlorine gas is prevented; and continuously removing product containing p-dichlorobenzene from the outlet of the reactor.
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Konishi et al.; Regioselective Para-Chlorination of Alkylbenzenes on Chemically Modified Silica Surfaces; Chemistry Letters; 1980; pp. 1423-1426.
Kovacic et al.; Chlorination of Aromatic Compounds with Metal Chlorides; Journal of the American Chemical Society; vol. 76; 11/5/54; pp. 5491-5494.
Wiegandt et al.; Improved Yields of p-Dichlorobenzene; Industrial and Engineering Chemistry; Sep. 1951; pp. 2167-2172.
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CA85; 46467t abstract of Japanese Kokai 74/76,828.
Browning James D.
Hillman Melville
Battelle (Memorial Institute)
Lone Werren B.
Wiesmann Klaus H.
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