Procedure for the production of polymeric sulfur
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United States of America Patent
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Apr 29, 2003
Grant Date -
Sep 20, 2001
app pub date -
Feb 5, 2001
filing date -
Feb 8, 2000
priority date (Note) -
Expired
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Abstract
A procedure for the production of polymeric sulfur with improved stability that comprises the stages of: (a) cooling in a vessel for rapid cooling the sulfur vapor from the vaporization of molten sulfur, by bringing it into direct contact with a refrigerating suspension composed of carbon disulphide, soluble sulfur and polymeric sulfur, to a temperature such that part of the sulfur vapor is transformed into a powder-like polymeric sulfur, insoluble in carbon disulphide. (b) extracting the resulting suspension from the cooling vessel; (c) recycling part of said suspension to the vessel for cooling; and (d) sending the rest of the suspension to a maturation stage to stabilize the polymeric sulfur.
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