Processes useful in the manufacture of cyclododecasulfur
AssigneeEastman Chemical Company
InventorsSCOTT DONALD BARNICKI, ROBERT THOMAS HEMBRE, SUMIT CHAKRABORTY, MICHAEL RICHARD LANINGHAM, VICKIE HAGOOD OSBORNE, LESLIE SHARON DEPEW, ANNETTE ELIZABETH STEVENS, JOHN DEREK WOOLLINS, GUOXIONG HUA
Life of this patent
Estimating the term…
Abstract
Methods for producing cyclododecasulfur are disclosed that include the steps of: reacting a metallasulfur derivative with a molecular halogen to produce cyclododecasulfur and a metallahalide derivative; and reacting the metallahalide derivative with a sulfide or polysulfide to produce the metallasulfur derivative and a halide.
Claims20
A method for producing cyclododecasulfur, comprising:
- reacting a metallasulfur derivative with a molecular halogen to produce cyclododecasulfur and a metallahalide derivative;
- and
- reacting the metallahalide derivative with a sulfide or polysulfide to produce the metallasulfur derivative and a halide.
A method for producing cyclododecasulfur, comprising:
- reacting (TMEDA)Zn(S6) with molecular bromine to produce cyclododecasulfur and (TMEDA)ZnBr2;
- and
- reacting (TMEDA)ZnBr2 with Na2Sx, wherein x is from about 1.0 to about 8, to produce (TMEDA)Zn(S6) and NaBr.
A method comprising reacting a metallahalide derivative with an alkali metal polysulfide to obtain a metallasulfur derivative and an alkali metal halide, optionally in the presence of elemental sulfur.
Dependencies are inferred from the claim text.