Title:
【発明の名称】液体の蒸気圧を測定する装置
Document Type and Number:
Japanese Patent JPH06504120
Kind Code:
A
Abstract:
True vapor pressure of liquid compositions, particularly multi-component compositions, is measured by a piston and cylinder apparatus defining an expansible chamber in which a simple of liquid is trapped, the chamber is expanded in multiple steps and multiple pressure and temperature measurements are taken at each expansion over a period of time. A resultant pressure at each expansion is determined from multiple measurements using the least squares method of approximation and the plural resultant pressure values are extrapolated to determine true vapor pressure using a straight-line approximation. The apparatus is adapted to continuously measure vapor pressure of a process stream by sampling a slipstream of liquid which is maintained at a constant temperature. The apparatus cylinder includes a bore which is closed at one end by a pressure transducer defining an end wall of the measurement chamber. The apparatus is mounted horizontally to minimize liquid depth and increase the rate of bubble formation during expansion of the chamber.
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Inventors:
Reed, donald bee
Application Number:
JP50068891A
Publication Date:
May 12, 1994
Filing Date:
October 10, 1991
Export Citation:
Assignee:
Atlantic Richfield Company
International Classes:
G01L7/00; G01N7/00; G01N7/14; G01N25/00; (IPC1-7): G01L7/00
Attorney, Agent or Firm:
Masamitsu Akizawa (1 person outside)