METHOD OF REGENERATING RUTHENIUM- OR RUTHENIUM COMPOUND-CONTAINING CATALYST CONTAMINATED WITH SULPHUR IN FORM OF SULPHUR COMPOUNDS Russian patent published in 2013 - IPC B01J23/46 B01J23/96 B01J38/42 C01B7/04 

FIELD: chemistry.

SUBSTANCE: present invention relates to a method of regenerating a catalyst, according to which content of sulphur in a ruthenium- or ruthenium compound-containing catalyst, which is contaminated with sulphur in form of sulphur compounds, is reduced by directed treatment with a gas stream containing a hydrogen halide, particularly hydrogen chloride, which is carried out in non-oxidative conditions, optionally at high temperature. Described is a method for catalysed gas-phase oxidation of hydrogen chloride with oxygen based on ruthenium or ruthenium compounds, wherein after reducing catalytic activity to a given value, the catalyst is regenerated according to the method described above.

EFFECT: content of sulphur in the catalyst can be reduced such that activity of the treated catalyst increases to a level which is typical for a similar ruthenium- or ruthenium compound-containing catalyst which is not deactivated with sulphur in form of sulphur compounds.

12 cl, 7 tbl, 7 ex