METHOD FOR SYNTHESIS OF SULPHUR PEROXIDE Russian patent published in 2021 - IPC C01B17/765 C01B17/50 C01B17/80 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of synthesis of sulphur peroxide intended for synthesis of sulphuric acid using sulphur-containing source materials with high potential for formation of so-called wet dust. The method of synthesis includes combustion over oxygenated flow in a furnace (3). Sulphur-containing compounds form SO₂ in the supply stream. Gas is further cooled by radiation for the heat to be utilized as high-pressure gas. No less than 50% of useful power in the waste heat boiler (5) is transferred by gas and particle radiation. Additionally the process gas outflowing from the waste heat boiler is cooled in a dilution air heater. The dilution air is added to the process gas to provide sufficient oxygen for oxygenation of SO₂ into SO₃ in the SO₂ converter. The diluted process gas is let into the SO₂ converter (12) containing an array of catalyst layers. The waste heat boiler is a radiant heat exchanger in form of a construction with membrane walls, wherein a wall is a cooling surface.

EFFECT: improved heat utilization, decreased deposition in the waste heat boiler and decreased occupied space of said boiler, increased turnaround cycle.

12 cl, 3 ex, 3 tbl, 6 dwg