Process for dissolving sulfur ore using diaryl disulfide

Details Process for dissolving sulfur ore using diaryl disulfide Process for dissolving sulfur ore using diaryl disulfide

2008-08-07

2009-12-22

Vanoy, Timothy C (Department: 1793)

Chemistry of inorganic compounds

Sulfur or compound thereof

Elemental sulfur

C023S29300R, C023S30800S, C299S005000, C299S016000, C299S095000, C241S024100

Reexamination Certificate

active

07635460

ABSTRACT:
Embodiments of a sulfur extraction process comprise treating mined sulfur ore with a disulfide oil to dissolve the sulfur in the ore. The process occurs at a temperature less than a temperature sufficient to melt sulfur. The sulfur crystals may be isolated by cooling the dissolved sulfur to a temperature sufficient to crystallize the sulfur. An apparatus for extracting sulfur from sulfur ore comprises a first receptacle for contacting a disulfide oil with mined sulfur ore at an elevated temperature sufficient to dissolve sulfur, a second receptacle coupled to the first receptacle for cooling dissolved sulfur such that sulfur crystals form, and a filtration apparatus coupled to the second receptacle for isolating the sulfur crystals. Solvents used in the apparatus may be recycled.

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McIntyre, L., “Rapture of the Heights,”Américas, vol. 45, No. 6, pp. 6-13 (Nov./Dec. 1993).
Voorhees, R.J. et al., “Diaryl disulfide solves sulfur-deposition problems at sour gas field,”Oil&Gas Journal, vol. 89, No. 35, pp. 85-89 (Sep. 2, 1991).

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