Assertion: toluene | /r/MadeOf | stock
Facets:
value: to a fractional distillation zone
type: TRANSITIVE-OBJECT
Source sentences:
text: A unitary process for preparing nitration grade toluene from hydrocarbon charge stocks containing toluene comprising passing the toluene containing stock to a fractional distillation zone ;s whereby a toluene cut is separated having a very narrow boiling range and containing unsaturated hydrocarbon impurities, treating said close cut fraction with sulfuric acid to remove the major portion of said impurities, fractionally distilling o said acid treated material to produce a toluene stock having a boiling range within about 1° C., distilling said close cut toluene stock in the presence of anhydrous aluminum chloride and metallic iron whereby substantially the remaining 5 unsaturated hydrocarbon impurities combine with the aluminum chloride to form a sludge-like material, the metallic iron being disposed in the vapor phase portion of the distillation apparatus and the aluminum chloride disposed in the liquid phase portion, said metallic iron promoting the formation of said sludge-like material, removing the toluene distillate and treating same with caustic alkali and finally recovering the nitration grade toluene.
text: A unitary process for preparing nitration'f grade toluene from hydrocarbon charge stocks containing toluene comprising passing the toluene containing stock to a fractional distillation zone whereby a toluene cut is separated having a very narrow boiling range and containing unsaturatedhydrocarbon impurities, treating said close cut fraction with sulfuric acid to remove the maior portion of said impurities, fractionally distilling