sulfur in neat (no solvent) CaC2 (85.3percent); pressure starts at 13 Torr, 1.5 h at 250°C - max. 360°C; high amts. of C; increase of temperature or time reduce yield of CS2;;
in neat (no solvent) byproducts: calcium polysulfide, calcium nitride; equimolar amts. of KSCN and CaC2 (85.65percent), 2 h at 500°C in vac.;; product contains large amts. of CaS and C, small amts. of Ca polysulfide, and traces of Ca nitrate;;
