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| - The metals of the metal salts to be reacted with the alkali metal salts of the carboxylic acids in U.S. Pat. No. 3,934,070 included, for example, Group Ib metals such as copper, silver, etc., Group IIa metals such as magnesium, calcium, etc., Group IIb metals such as zinc, cadmium, mercury, etc., Group IIIb metals such as aluminum, gallium, etc., Group IVb metals such as tin, lead, etc., Group VIa
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