Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1975-05-27
1976-05-04
Davis, C.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
260668F, 260671A, C07C 352
Patent
active
039548953
ABSTRACT:
In the method wherein an alkenylation reaction product liquid obtained by the alkenylation reaction of an alkylbenzene and a C.sub.4 - C.sub.5 conjugated diene in the presence of alkali metal catalysts and containing unreacted alkylbenzene, alkali metal catalysts and organo-alkalimetal compounds is conveyed to a distillation zone at which said alkenylation reaction product liquid is separated by distillation to recover an alkenylbenzene-containing fraction and an unreacted alkylbenzene-containing fraction, the improvement which comprises adjusting the total of the concentrations of said alkali metal catalysts and organo-alkalimetal compounds in said alkenylation reaction product liquid introduced to the distillation zone so as to be 0.09 - 15 milligram atoms per kilogram of said product liquid, calculated as alkalimetal atoms, and thereafter conducting the distillation of said product liquid under conditions of non-addition of alcohols.
REFERENCES:
patent: 3766288 (1973-10-01), Shima et al.
patent: 3865889 (1975-02-01), Mitchell
patent: 3904702 (1975-09-01), Mitchell
Iwata Kazumi
Shima Takeo
Tokashiki Michiyuki
Davis C.
Hess J. Edward
Johnson Donald R.
Teijin Limited
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