Absorbents

B - Operations – Transporting – 01 – J

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B01J 20/04 (2006.01) B01D 53/68 (2006.01) B01J 20/06 (2006.01)

Patent

CA 2313100

Shaped absorbent units suitable for use as chloride absorbents comprising a calcined intimate mixture of an alkali or alkaline earth, zinc and aluminium components having an alkali or alkaline earth metal to zinc atomic ratio in the range 0.5× to 2.5× and an alkali or alkaline earth metal to aluminium atomic ratio in the range 0.5× to 1.5×, where x is the valency of the alkali or alkaline earth metal, and containing from 5 to 20 % by weight of a binder. Preferred compositions are made from sodium carbonate or bicarbonate, basic zinc carbonate or zinc oxide and alumina or hydrated alumina.

Articles absorbants façonnés conçus pour être utilisés en tant qu'absorbants de chlorure et contenant un mélange intime calciné de constituants alcalins ou terreux alcalins, de zinc et d'aluminium présentant un rapport atomique entre métal alcalin ou terreux alcalin et zinc situé dans une plage de 0,5x à 2,5x et un rapport atomique entre métal alcalin ou terreux alcalin et aluminium situé dans une plage de 0,5x à 1,5x, x représentant la valence du métal alcalin ou terreux alcalin, ainsi que 5 à 20 % en poids d'un liant. On prépare les compositions préférées à partir de carbonate ou bicarbonate de sodium, carbonate de zinc ou oxyde de zinc basiques et oxyde d'aluminium ou oxyde d'aluminium hydraté.

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