FIELD: chemistry.
SUBSTANCE: present invention relates to a method of regenerating catalytic activity of spent catalyst. A method is described for regenerating catalytic activity of spent water treatment catalyst (versions), where the said method involves: provision for said spent water treatment catalyst with first carbon concentration of over 3 wt %; reduction of carbon concentration on the said spent water treatment catalyst, obtaining catalyst with low carbon concentration as a result, with second carbon concentration ranging from 0.5 wt % to 2.5 wt %, with bringing the said spent water treatment catalyst into contact with oxygen-containing gas in carbon burning conditions and regulation of amount of carbon removed from the said spent water treatment catalyst so as to obtain the said catalyst with low carbon concentration, with the said second carbon concentration; and bringing the said catalyst with low carbon concentration into contact with a solution which contains a chelating agent and a solvent so as to introduce the said chelating agent into the said catalyst with low carbon content; ageing of the said catalyst with low carbon content, containing the said solution during ageing time, obtaining aged catalyst as a result, where the said ageing time is sufficient for regenerating catalytic activity of said catalyst with low carbon content; and drying the said aged catalyst with removal of part of the said solvent from the said aged catalyst, obtaining dried aged catalyst as a result; and sulphur treatment of the said dried aged catalyst, that way obtaining the said regenerated catalyst.
EFFECT: design of a method of regenerating activity of catalysts, obtaining regenerated catalyst with higher level of regenerated catalytic activity.
22 cl, 1 dwg, 2 tbl, 2 ex
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