N-Methyl pyrrolidone-2 purification

Details N-Methyl pyrrolidone-2 purification N-Methyl pyrrolidone-2 purification

1982-12-21

1985-02-26

Hollrah, Glennon H.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

528388, 564216, 549 87, 568 27, C07D206267

Patent

active

045019029

ABSTRACT:
A process for removing compounds from aprotic solvents in which aprotic solvent containing at least one acidic compound is contacted with a solid inorganic compound chosen from alkaline earth carbonates, alkaline earth hydroxides, alkaline earth oxides, and alumina in which the contact of the solvent with a solid inorganic compound is by the process of fluidized bed contact, stirred slurry contact or trickle bed contact. Contaminated NMP from poly(phenylene sulfide) production is substantially freed of acidic contaminants by a series of fractionations with a treatment of the kettle liquid of at least one fractionation by the method described above and/or a treatment of the overhead of the last fractionation in series by the method described above.

REFERENCES:
patent: 2828307 (1958-03-01), Soeterbroek et al.
patent: 2939869 (1980-06-01), Carlson
patent: 2964535 (1960-12-01), Clements
patent: 3658659 (1972-04-01), Cottle
patent: 3707528 (1972-12-01), Miles
patent: 3783138 (1974-01-01), Miles et al.
patent: 4014900 (1977-03-01), Pusztaszeri

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