Continuous-flow free acid monitoring method and system

Patent · Thu Jan 01 04:00:00 EST 1981

OSTI ID:863906

Strain, James E ^[1]; Ross, Harley H ^[2]

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1. Kingston, TN
2. Oak Ridge, TN

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.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4272247
• OSTI ID: 863906
• Country of Publication: United States
• Language: English

Related Subjects

/436/422/
acid
acid molarity
acid monitoring
acid solution
apparatus
based
condensate
condensed
conductivity
constant
constant temperature
continuous
continuous flow
continuous-flow
continuously
continuously measuring
determined
disclosed
equilibrium
excess
flowing
flowing sample
flows
free
free acid
function
gravity
influence
linear response
measurements
measuring
method
molarity
monitor
monitoring
monitoring method
nonlinear
partial
partial pressure
portion
pressure
pressure ratio
process
process stream
produces
provided
pumped
ratio
relationship
response
response function
sample
solution
stream
subsequently
temperature
vapor
vaporized
water