Recovery of terephthalonitrile

Details Recovery of terephthalonitrile Recovery of terephthalonitrile

1977-04-28

1978-09-26

Torrence, Dolph H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

203 42, 203 60, 260465C, C07C12014, C07C12158

Patent

active

041169999

ABSTRACT:
Terephthalonitrile is separated from p-xylene containing solution by fractional distillation in the presence of p-tolunitrile, with the p-tolunitrile being present in the fractional distillation tower in an amount sufficient to solubilize the terephthalonitrile in all portions of the column at which the temperature in the column is below the melting point of tetephthalontrile, whereby terephthalonitrile can be recovered as a liquid. The solution generally includes p-xylene, benzonitrile, p-tolunitrile and terephthalonitrile and is separated from a terephthalonitrile production reaction effluent by direct contact quenching with an organic liquid containing p-tolunitrile.

REFERENCES:
patent: 3206378 (1965-09-01), Teramoto et al.
patent: 3732275 (1973-05-01), Platz et al.
patent: 3801620 (1974-04-01), Hosler et al.

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