24.
(11) Patent number: 2152253
(46) Date of publication: 10.07.2000
(51) Int. Cl.7: B 01 J 23/70, 23/86, 23/745, 21/16, 20/06
(21) Application number: 99111379/12
(22) Application date: 28.05.1999
(71) Applicant:
Institut kataliza im. G.K. Boreskova SO RAN
(72) Inventor:
Kirchanov A.A.,
Kulikovskaja N.A.
(73) Proprietor:
Institut kataliza im. G.K. Boreskova SO RAN
(98) Mail address:
630090, g.Novosibirsk, pr. Akademika Lavrent'eva 5, Institut kataliza im. G.K. Boreskova, patentnyj otdel, Judinoj T.D
(54) METHOD OF REUSING ELECTROPLATING SLUDGE
(57)
FIELD: electroplating processes. SUBSTANCE: conversion of electroplating sludge into catalyst is preceded by treatment of crude material, preparation of molding paste, molding, and final heat treatment at 500-550 C. In particular, sludge containing 40-45% Fe2O3 , 10-15% CuO, and 5-10% Cr2O3 is preliminarily activated at 120 to 550 C and further activated mechanochemically by grinding on ball mill to particle size 0.5 to 5 mcm. Paste is prepared with liquefied natural clay and then dried to moisture 26-28%. Molding is accomplished by extruding cutting-shaped or cellular-structure product that can be used as catalyst in the process of ammonia-mediated selective reduction of nitrogen oxides. EFFECT: efficiently used waste. 4 cl, 1 tbl, 4 ex
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