Method for dimerization of aromatic halide compounds
AssigneeMitsubishi Chemical Industries Limited
InventorsMitsumasa Kitai, Yoshio Katsuro, Shigenori Kawamura, Masumi Hino, Keiichi Sato
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Abstract
A method of dehalogeno-dimerizing an aromatic halide compound substituted by at least one halogen atom substituted on the aromatic ring using a palladium catalyst on support in the presence of water, a reducing agent and a halogen acceptor is disclosed. The method is characterized by using the palladium catalyst on support immersed in a hydrohalogenic acid prior to the dehalogeno-dimerization reaction.
Claims25
A method of dehalogeno-dimerizing, in the presence of a palladium catalyst, water, a reducing agent, and a halogen acceptor, an aromatic halide compound selected from the group consisting of a halogenated phthalic acid, a salt thereof with an alkali metal, a halogenated phthalic acid anhydride, and mixtures thereof, which comprises immersing said palladium catalyst on a support in a hydrohalogenic acid prior to said dehalogeno-dimerizing.
Dependencies are inferred from the claim text.