Method and apparatus for measuring vapor pressure of multicompon

Details Method and apparatus for measuring vapor pressure of multicompon Method and apparatus for measuring vapor pressure of multicompon

1994-10-19

1997-06-10

Brock, Michael

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

Vapor pressure

G01N 1300

Patent

active

056377916

ABSTRACT:
An online vapor pressure analyzer that determines continuously and not in batch mode, the vapor pressure of a sidestream sample composed of a single compound liquid having a single vapor pressure or a mixture of liquid compounds having different vapor pressures. It determines the highest pressure of the liquid in a given temperature at which the lightest component starts to flash, such pressure being the vapor pressure of the liquid at that temperature. The sidestream sample is pass through the analyzer and then returned to the process line. The analyzer is comprised of an upstream aeration or density measurement means, a pressure reducing means such as capillary tubing to reduce the pressure to the vapor pressure of the liquid without creating pressure recovery and promote flashing at the true vapor pressure by fluid shear, a downstream aeration or density measurement means, and instrumentation means to detect vapor pressure, temperature and minimum aeration or density change that signifies flashing of the lightest component at the vapor pressure of the liquid. A flow regulator controls amount of sample admitted and therefore controls the pressure drop across the capillary tubing. A pumps returns the sample to the process line.

REFERENCES:
patent: 3056282 (1962-10-01), Boyd, Jr.
patent: 4905505 (1990-03-01), Reed

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