METHOD FOR THE REGENERATION OF PHOSPHOR-LADEN DENOX CATALYSTS

摘要

The invention relates to a method for the regeneration of deNOx catalysts wi th a reduced activity caused by the accumulation of phosphor and phosphorous compounds. The method is characterised in that the catalysts are treated wit h an essentially aqueous solution of water-soluble alkaline reacting alkaline earth salts, ammonium hydroxide, or alkaline reacting ammonium salts, or wat er- 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.