FIELD: inorganic chemistry, chemical technology. SUBSTANCE: gas which contains SO2 is brought into contact with potassium citrate having concentration 1.0-3.5 mol/l. The process is carried out at pH 4.5-7.0 till concentration of sulfur dioxide in adsorbent is 40-160 g/l, it is followed by treatment of sorbent. Said treatment is carried out at temperature being higher than melting point of sulfur with the help of H2S-containing gas. Thus obtained sulfur is isolated and adsorbent is recycled for absorption of SO2. EFFECT: intensifies the process. 6 cl, 3 tbl, 2 dwg
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