Process for operating extraction or extractive distillation _app

Details Process for operating extraction or extractive distillation _app Process for operating extraction or extractive distillation _app

1977-12-23

1980-03-04

Bascomb, Jr., Wilbur L.

Distillation: processes, separatory

With measuring, testing or inspecting

Of concentration

203 7, 203 33, 203 35, 203 43, 203 51, 203 58, 208326, 252387, 422 7, 585855, 585860, B01D 340, C23F 1100

Patent

active

041916158

ABSTRACT:
In order to prevent corrosion of the apparatus in extraction and extractive distillation processes where N-substituted morpholine is employed as the selective solvent an additive is added to the solvent which additive consists of (a) phosphoric acid, (b) a salt thereof, (c) a vanadium compound, (d) a molybdenum compound or (e) a mixture of two or more of these compounds, the addition being effected in an amount of about 0.005 to 0.02% by weight of the morpholine solvent.

REFERENCES:
patent: 2199180 (1940-04-01), Laughlin
patent: 2416500 (1947-02-01), Scarth
patent: 2908640 (1959-10-01), Dougherty
patent: 3030308 (1962-04-01), Agnew
patent: 3325399 (1967-06-01), Cinelli et al.
patent: 3679579 (1972-07-01), Preusser et al.
patent: 3723347 (1973-03-01), Mitchell
patent: 3764548 (1973-10-01), Redmore
patent: 3808140 (1974-04-01), Mago
patent: 3923539 (1975-12-01), Jorns
patent: 3951844 (1976-04-01), Mago et al.

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