Assertion: crude benzoic acid | /r/HasProperty | obtained by catalytic oxidation of toluene
Facets:
value: with an oxygencontaining gas
type: OTHER
Source sentences:
text: A process for purifying crude benzoic acid obtained by the catalytic oxidation of toluene with an oxygen-containing gas, which process comprises contacting said crude benzoic acid in the molten state with 06-14 parts by weight of water per part of crude benzoic acid at a temperature of about 95 C. to about 117 C., thereby forming two liquid benzoic acid-containing phases in substantial equilibrium, said liquid phases consisting of a light aqueous phase and a heavy organic phase, separating said phases, cooling said aqueous phase, thereby causing precipitation therefrom of purified benzoic acid, and separating said purified benzoic acid.
text: A process for purifying crude benzoic acid obtained by the catalytic oxidation of toluene with an oxygencontaining gas, which process comprises contacting said crude benzoic acid in the molten state at -100 C. with about 06-14 parts by weight of water, thereby forming two liquid phases in substantial equilibrium, said phases consisting of a light aqueous phase and a heavy organic phase, separating said phases, cooling said aqueous phase to a temperature below 94.6 C., thereby causing precipitation therefrom of purified benzoic acid, and separating said purified benzoic acid.
text: A process for purifying crude benzoic acid obtained by the catalytic oxidation of toluene with an oxygencontaining gas, which process comprises contacting said benzoic acid in the molten state with about 0.7 to about 7 parts by weight of water at about 110 C. to about 117 C. in an extraction zone under sufiicient pressure to maintain the water in the liquid state, thereby forming two liquid phases in substantial equilibrium, said phases consisting of a first aqueous phase and a first organic phase, separating said phases, cooling said first aqueous phase to a temperature of about 95 C. to about C., thereby causing the formation of two liquid phases consisting of a second aqueous phase and a second organic phase, separating said second phases, and cooling said second aqueous phase to a temperature below 94.6" C., thereby causing crystallization therefrom of benzoic acid.