Method for the automated manufacture of pure SO2 from sulfur...

Details Method for the automated manufacture of pure SO2 from sulfur... Method for the automated manufacture of pure SO2 from sulfur...

2006-05-30

2006-05-30

Silverman, Stanley S. (Department: 1754)

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

C423SDIG018, C423SDIG018

Reexamination Certificate

active

07052670

ABSTRACT:
A method for the automated production of liquid SO2having a purity above 99.9% from elemental sulfur and pure oxygen, in the presence of SO2recirculated from a closed circuit production system. The temperature of the combustion is controlled by means of pre-defined S, O2and SO2ratios. The automation is made based on oxygen sensors and on sulfur and SO2flow meters with their respective control connections and proportional valves permitting a fine control of the sulfur combustion reaction. Liquefaction of gaseous SO2produced is carried out alternatively by a cool plant working between −10 and −60° C. or with a compression unit working at a pressure between 3.8 and 5.0 bar. The automation permits an optimum temperature control and a clean production of SO2.

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