in neat (no solvent)
SO3 is distilled (from 65 percent oleum) into cooled (ice/water) vessel containing SCl2; evolution of SO2;; multiple fractionation (at last in presence of sulfur);;
参考文献
Michaelis, A.
Liebigs Annalen der Chemie, 1893 , vol. 274, p. 173 - 186
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Gmelin Handbook: S: MVol.B3, 122, page 1791 - 1793
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Feher, F.
Brauer, G., Handbuch der praeparativen anorganischen Chemie, Stuttgart 1954, S. 294