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Title: Continuous-flow free acid monitoring method and system

Abstract

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.

Inventors:
 [1];  [2]
  1. Kingston, TN
  2. Oak Ridge, TN
Issue Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
OSTI Identifier:
863906
Patent Number(s):
4272247
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
continuous-flow; free; acid; monitoring; method; apparatus; provided; continuously; measuring; excess; process; stream; disclosed; based; relationship; partial; pressure; ratio; water; equilibrium; solution; constant; temperature; portion; pumped; flows; monitor; influence; gravity; continuous; flowing; sample; vaporized; vapor; subsequently; condensed; conductivity; measurements; condensate; produces; nonlinear; response; function; molarity; determined; monitoring method; constant temperature; continuous flow; acid solution; process stream; partial pressure; response function; acid molarity; pressure ratio; free acid; flowing sample; acid monitoring; continuously measuring; linear response; /436/422/

Citation Formats

Strain, James E, and Ross, Harley H. Continuous-flow free acid monitoring method and system. United States: N. p., 1981. Web.
Strain, James E, & Ross, Harley H. Continuous-flow free acid monitoring method and system. United States.
Strain, James E, and Ross, Harley H. Thu . "Continuous-flow free acid monitoring method and system". United States. https://www.osti.gov/servlets/purl/863906.
@article{osti_863906,
title = {Continuous-flow free acid monitoring method and system},
author = {Strain, James E and Ross, Harley H},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1981},
month = {1}
}