Distillation: processes – separatory – Distilling to separate or remove only water
Patent
1979-09-07
1982-05-18
Sever, Frank
Distillation: processes, separatory
Distilling to separate or remove only water
203 35, 203 39, 203 50, 203 91, 423488, B01D 340
Patent
active
043303749
ABSTRACT:
Relatively dry hydrogen iodide can be recovered from a mixture of HI, I.sub.2 and H.sub.2 O. After the composition of the mixture is adjusted so that the amounts of H.sub.2 O and I.sub.2 do not exceed certain maximum limits, subjection of the mixture to superatmospheric pressure in an amount equal to about the vapor pressure of HI at the temperature in question causes distinct liquid phases to appear. One of the liquid phases contains HI and not more than about 1 weight percent water. Often the adjustment in the composition will include the step of vaporization, and the distinct layers appear following the increase in pressure of the vapor mixture. Adjustment in the composition may also include the addition of an extraction agent, such as H.sub.3 PO.sub.4, and even though the adjusted composition mixture contains a significant amount of such an agent, the creation of the distinct liquid phases is not adversely affected.
REFERENCES:
patent: 3839550 (1974-10-01), Wentorf
patent: 4127644 (1978-11-01), Norman et al.
patent: 4176169 (1979-11-01), Mysels
"Jrnl. of A.C.S.", Aug. 1909, pp. 851-867.
"Comprehensive Inorganic Chemistry", Sneed et al., vol. III, pp. 104-108.
"Solubilities", Linke, vol. I, pp. 1110-1125.
"Chemical Engineers' Handbook", Perry, 4th Ed., 1963, page opposite front cover.
de Graaf Johannes D.
McCorkle, Jr. Kenneth H.
O'Keefe Dennis R.
General Atomic Company
Sever Frank
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