Recovery of N-ethylpiperazine by distillation

Details Recovery of N-ethylpiperazine by distillation Recovery of N-ethylpiperazine by distillation

1995-08-02

1997-05-06

Bhat, Nina

Distillation: processes, separatory

Plural distillations performed on same material

One a distillation under positive pressure or vacuum

203 79, 203 92, 203 97, 544404, B01D 310, B01D 338

Patent

active

056267240

ABSTRACT:
In a process for the recovery of N-ethylpiperazine by distillation from mixtures with N,N'-diethylpiperazine, piperazine, ethanol, water and accompanying substances, water is added in a manner such that, at the location of the addition of the water, the piperazine concentration is greater than the N-ethylpiperazine concentration. The water may be added to the reflux to the top of the column.

REFERENCES:
patent: 3126383 (1964-03-01), Cooper
patent: 3154552 (1964-10-01), Weipert et al.
patent: 4736030 (1988-04-01), Mueller et al.
patent: 4911793 (1990-03-01), Mueller et al.

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