METHOD FOR THE REGENERATION OF PHOSPHORUS-LOADED DENOX CATALYSTS

The invention relates to a method for the regeneration of deNOx catalysts with a reduced activity caused by the accumulation of phosphor and phosphorous compounds. The method is characterised in that the catalysts are treated with an essentially aqueous solution of water-soluble alkaline reacting al...

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Bibliographic Details
Main Authors SCHLUTTIG, ALEXANDER, FOERSTER, MARCEL
Format Patent
LanguageEnglish
French
Published 19.07.2011
Subjects
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
THEIR RELEVANT APPARATUS
TRANSPORTING
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Summary:The invention relates to a method for the regeneration of deNOx catalysts with a reduced activity caused by the accumulation of phosphor and phosphorous compounds. The method is characterised in that the catalysts are treated with an essentially aqueous solution of water-soluble alkaline reacting alkaline earth salts, ammonium hydroxide, or alkaline reacting ammonium salts, or water-soluble organic amines with an approximate pK value ranging between 2.5 and 5.5 and that the excess alkali is neutralised by subsequent treatment with inorganic or organic acids.
Bibliography:Application Number: CA20032496693