Absorbents

Details Absorbents Absorbents

B - Operations, Transporting

01

J

B01J 20/08 (2006.01) B01D 53/14 (2006.01) B01D 53/68 (2006.01) B01J 20/04 (2006.01)

Patent

CA 2183319

Absorbent for acidic gases such as hydrogen chloride in the form of granules, preferably having a particle size greater than 2 mm and a BET surface area of at least 10 m2/g, comprising an intimate mixture of an alumina component selected from alumina and/or hydrated alumina, an alkali component selected from sodium carbonate and/or sodium bicarbonate in weight proportions of 0.5 to 2 parts of said alkali component per part of said alumina component, and a binder, said granules containing from 5 to 20 % by weight of said binder and having an alkali component content such that, after ignition of a sample of the granules at 900 ~C, the sample has a sodium oxide, Na2O, content of at least 20 % by weight.

Absorbant, destiné à des gaz acides tels que le chlorure d'hydrogène, se présentant sous forme de granulés dont la dimension de particule est, de préférence, supérieure à 2 mm, et la surface active d'au moins 10m?2¿/g, et qui sont composés d'un mélange intime d'un constituant alumine choisi parmi l'alumine et/ou l'alumine hydraté, d'un constituant alcalin choisi parmi le carbonate et/ou le bicarbonate de sodium, dans des proportions de poids comprises entre 0,5 et 2 parts de constituant alcalin pour une part de constituant alumine, ainsi que d'un liant; ces granulés contiennent de 5 à 20 % en poids dudit liant, et ils possèdent une teneur en constituant alcalin telle que, après calcination à 900~ C d'un échantillon de ceux-ci, leur teneur en oxyde de sodium, Na¿2?O, est d'au moins 20 % en poids.

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