Chemistry: electrical and wave energy – Processes and products – Processes of treating materials by wave energy
Patent
1994-05-03
1996-01-02
Niebling, John
Chemistry: electrical and wave energy
Processes and products
Processes of treating materials by wave energy
20415715, 2041573, 2041574, 2041576, 210748, 588227, 588243, 588247, 588219, C07C 6300
Patent
active
054805244
ABSTRACT:
The present invention relates to a method and pertinent apparatus for purifying gases, exhaust gases, vapors, and brines, which are contaminated with undesirable chemical substances or contain high concentrations of these substances, by means of photocatalytic reactions occurring on the surface of catalysts.
The catalysts are situated in a fixed or fluidized bed on catalyst carriers. In fluidized beds, the catalysts themselves can serve as catalyst carriers. The substrates to be purified are fed through a closed system which contains the catalyst carriers and catalysts.
In the fixed-bed catalytic method, the catalyst carrier/catalyst system continuously or discontinuously passes through a washing zone to remove the generated mineralization products. The reaction is induced by shortwave photons of wavelengths between 250 and 400 nm.
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Europaischer Recherchenbericht.
CA95 (21) 187326n, "Photocatalytic effect of yttrium chlorides and yttrium subgroup lanthanide chlorides".
Aalbers Robert
Dietrich neeLeye Olga
Muirheid C. Delacroix
Niebling John
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