Process for determining and controlling the composition of aqueo

Details Process for determining and controlling the composition of aqueo Process for determining and controlling the composition of aqueo

1983-12-23

1986-02-25

Doll, John

Chemistry of inorganic compounds

Miscellaneous process

436 19, 436 52, 436113, F27B 1508

Patent

active

045728305

ABSTRACT:
A process for determining the composition of an aqueous solution of ammonia and carbon dioxide from which ammonium carbamate or ammonium carbonate crystallizes out upon cooling to below the saturation temperature. The density and the saturation temperature of the solution are measured, and the ammonia, carbon dioxide, and water composition is determined by reference to densities and saturation temperatures of aqueous solutions of ammonia and carbon dioxide of known composition. The composition thus determined can be used to effect control over the composition of such aqueous solutions.

REFERENCES:
patent: 3940440 (1976-02-01), Mavrovic
patent: 3957868 (1976-05-01), Verstegen et al.
Edward W. Washburn, Editor-in-Chief, International Critical Tables of Numerical Data, Physics, Chemistry and Technology, McGraw-Hill Book Company Inc., NY, 1928, vol. IV, p. 219, vol. III, p. 62.

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