Process for concentrating aqueous solutions of hydroxylammonium

Details Process for concentrating aqueous solutions of hydroxylammonium Process for concentrating aqueous solutions of hydroxylammonium

1988-04-11

1989-07-25

Spear, Frank

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210640, 210651, B01D 1300

Patent

active

048511250

ABSTRACT:
Concentrated solutions of inorganic hydroxylammonium salts can safely be produced in a process for concentrating a dilute solution of an inorganic hydroxylammonium salt by contact with a membrane having a sorption side and a desorption side. The process comprises contacting the dilute solution with the sorption side of a membrane, which is substantially permeable to the solvent and substantially impermeable to the solute of the solution, to sorb the solvent and permit the solvent to flow through the membrane to the desorption side. Desorbing the solvent from the desorption side of the membrane.
Highly concentrated aqueous solutions of hydroxylammonium salts which are heat sensitive are produced by the novel process of the invention which does not require directly heating the solution and is substantially free of hazards.

REFERENCES:
patent: 4552636 (1985-11-01), van den Brink

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