Procedure for the production of polymeric sulfur

The invention relates to a procedure for the production of polymeric sulfur, also known as sulfur "mu" or as insoluble sulfur because it is insoluble in carbon disulphide. This form of sulfur of a polymeric nature, consisting of polymeric chains of up to several thousand atoms of sulfur, is meta-stable, that is, it evolves in time at a variable rate (greater at higher temperature) towards more stable allotropic (non-polymeric) forms that are soluble in carbon disulphide and other solvents. 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.