Process for removing oxidizable substance or reducible substance, composite containing metal oxide or hydroxide, and process for production thereof
AssigneeTosoh Corporation
InventorsKengo Okajima, Hiroyuki Wakamatsu, Tsugio Murakami, Hiroyuki Saitoh
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Abstract
An oxidizable substance and/or a reducible substance is removed from a liquid, such as a liquid industrial waste, by treating the liquid with a composite comprising a fluorine-containing organic cation exchanger and a metal oxide or hydroxide, supported on the cation exchanger. The metal of the metal oxide or hydroxide is selected from manganese and elements of group 1B and group 8 of the periodic table. This treatment is carried out, if required, in the presence of an oxidizing agent, or by using the composite which has previously been treated with an oxidizing agent.
Claims6
A composite comprising a fluorine-containing organic cation exchanger and at least one metal oxide or hydroxide, said metal selected from the group consisting of manganese and elements of group 1B and group 8 of the periodic table, and at least 5% by weight of the entire amount of the metal oxide or hydroxide being supported within the fluorine-containing organic cation exchanger, said composite prepared by exchanging counter ions of the organic cation exchanger with a metal ion forming the metal oxide or hydroxide and thereafter contacting the ion-exchanged organic cation exchanger with an alkali or an oxidizing agent or both thereby converting the metal ion to an oxide or hydroxide form.
A process for preparing a composite comprising a fluorine-containing organic cation exchanger and at least one metal oxide or hydroxide, said metal selected from the group consisting of manganese and elements of group 1B and group 8 of the periodic table, said process comprising the steps of:
- exchanging counter ions of the organic cation exchanger with a metal ion for forming the metal oxide or hydroxide, and thereafter
- contacting the ion exchanged organic cation exchanger with at least one material selected from the group consisting of an alkali and an oxidizing agent, whereby the metal ion is converted to an oxide or hydroxide form.
Dependencies are inferred from the claim text.