Methyl iodide adsorber, use thereof and method for the adsorption of methyl iodide
AssigneeClariant Produkte (Deutschland) GmbH
InventorsKatharina Donabauer, Arno Tissler, Mika Endler, Olaf Buttner
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Abstract
A methyl iodide adsorber, comprising a zeolite containing at least one iodide-adsorbing metal or a compound thereof, wherein the zeolite is a hydrophobic zeolite. Also, a use of the adsorber and a method for the adsorption of methyl iodide.
Claims15
Methyl iodide adsorber, comprising a zeolite containing at least one iodide-adsorbing metal or a compound thereof, wherein the zeolite is a hydrophobic zeolite.
Adsorber according to one of the previous claims,
- in which the zeolite or the adsorber has a proportion of micropores of more than 70%, preferably more than 80%, relative to the total pore volume of the zeolite or of the adsorber;
- and/or
- in which the iodide-adsorbing metal is substantially situated in the pores of the zeolite.
Adsorber according to one of the previous claims,
- in which the zeolite is an aluminium silicate;
- and/or
- in which the zeolite has an SiO2/Al2O3 ratio >10, preferably >30, even more preferably >100;
- and/or
- in which the zeolite has an SiO2 proportion >94 wt. %, preferably >98 wt. %.
Adsorber according to one of the previous claims, in which the zeolite is selected from the group consisting of AFI, AEL, BEA, CHA, EUO, FAU, FER, KFI, LTL, MAZ, MOR, MEL, MTW, OFF, TON and MFI.
Adsorber according to one of the previous claims,
- in which at least one promoter is contained for reducing the water decomposition by the iodide-adsorbing metal.
Adsorber according to one of the previous claims,
- in which the promoter comprises lead;
- and/or
- in which the content of iodide-adsorbing metal in the zeolite or in the adsorber is 0.1 to 50 wt. %, more preferably 5 to 30 wt. %, and most preferably 10 to 20 wt. %;
- and/or
- in which the content of promoter or lead in the zeolite or in the adsorber is 1 to 30 wt. %, more preferably 5 to 30 wt. %, further preferably 10 to 20 wt. %, and most preferably 3 to 6 wt. %.
Adsorber according to one of the previous claims, in which the BET surface area of the zeolite or of the adsorber is 10 to 1000 m2/g, preferably 300 to 900 m2/g, particularly preferably 500 to 700 m2/g and/or the integral pore volume of the zeolite or of the adsorber is greater than 100 mm3/g.
Adsorber according to one of the previous claims,
- in which the adsorber is formed as bulk material;
- and/or
- in which the adsorber comprises a support to which the zeolite or a washcoat containing the zeolite is applied.
Use of the methyl iodide adsorber according to one of the previous claims for the adsorption of methyl iodide, radioactive methyl iodide, iodine and/or radioactive iodine.
Dependencies are inferred from the claim text.