Sulfur-producing process and system for producing sulfur dioxide

US3988428A · kind A · utility

Assignee

• Metallgesellschaft AG · DE

Inventors

• Karl-Heinz Dorr
• Siegfried Bielz
• Dan Constantinescu
• Hubert Vollmer · Mahopac, US
• Rudolf Beuchelt
• Hans Guth · Leverkusen, DE
• Peter Reher
• Herman Wieschen

Key dates

• Filing date: Apr 12, 1974
• Grant date: Oct 26, 1976
• Expiry date: Apr 12, 1994

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01B17/54
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Sulfur dioxide is formed by the combustion of elemental sulfur in two distinct stages wherein oxygen-containing gas in a quantity which is initially less than that stoichiometrically required for total combustion of the sulfur to sulfur dioxide and the sulfur-dioxide gases and residual elemental sulfur are thereupon passed through a heat exchanger and subjected to an afterburning with additional quantities of oxygen-containing gas. 70% to 95% of the total oxygen required for combustion of sulfur is supplied in the initial or combustion stage and the remainder (i.e. 30 to 5%) is supplied in the afterburning stage.