Continuous-flow free acid monitoring method and system

Patent · Tue Jun 09 04:00:00 EDT 1981

OSTI ID:5950908

Ross, H H; Strain, J E

A free acid monitoring method and apparatus is provided for continuously measuring the excess acid present in a process stream. The disclosed monitoring system and method is based on the relationship of the partial pressure ratio of water and acid in equilibrium with an acid solution at constant temperature. A portion of the process stream is pumped into and flows through the monitor under the influence of gravity and back to the process stream. A continuous flowing sample is vaporized at a constant temperature and the vapor is subsequently condensed. Conductivity measurements of the condensate produces a nonlinear response function from which the free acid molarity of the sample process stream is determined.

• Assignee: Department of Energy
• Patent Number(s): US 4272247
• OSTI ID: 5950908
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400100* -- Analytical & Separations Chemistry
AQUEOUS SOLUTIONS
DISPERSIONS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
EVAPORATION
FLUIDS
GASES
HYDROGEN COMPOUNDS
INORGANIC ACIDS
MIXTURES
MONITORING
NITRIC ACID
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
QUANTITY RATIO
SOLUTIONS
VAPORS