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WO1997013138A3 - Surface tension measurement in a pressurized environment - Google Patents

Surface tension measurement in a pressurized environment Download PDF

Info

Publication number
WO1997013138A3
WO1997013138A3 PCT/US1996/015923 US9615923W WO9713138A3 WO 1997013138 A3 WO1997013138 A3 WO 1997013138A3 US 9615923 W US9615923 W US 9615923W WO 9713138 A3 WO9713138 A3 WO 9713138A3
Authority
WO
WIPO (PCT)
Prior art keywords
pressure
surface tension
signal
differential
input
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US1996/015923
Other languages
French (fr)
Other versions
WO1997013138A2 (en
Inventor
Tanya C Christensen
Alexander F Teichmann
Victor P Janule
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CHEM-DYNE RESEARCH Corp
CHEM DYNE RESEARCH CORP
Original Assignee
CHEM-DYNE RESEARCH Corp
CHEM DYNE RESEARCH CORP
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CHEM-DYNE RESEARCH Corp, CHEM DYNE RESEARCH CORP filed Critical CHEM-DYNE RESEARCH Corp
Priority to US09/043,952 priority Critical patent/US6085577A/en
Priority to JP9514451A priority patent/JPH11513492A/en
Priority to DE19681587T priority patent/DE19681587C2/en
Publication of WO1997013138A2 publication Critical patent/WO1997013138A2/en
Publication of WO1997013138A3 publication Critical patent/WO1997013138A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
    • G01N13/02—Investigating surface tension of liquids

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)
  • Monitoring And Testing Of Nuclear Reactors (AREA)
  • Measuring Fluid Pressure (AREA)
  • Measuring Volume Flow (AREA)

Abstract

Method and apparatus for measuring the surface tension of a liquid inside a vessel (1), reactor, or inside a section of flow-through process pipe that is pressurized above normal ambient pressure, up to but not limited, to 1000 psig (7000kPa), includes a pair of tubes (2, 3) having a small and large orifice in a modular probe assembly that allows the probes to be positioned at selected and variable distances below the surface of the fluid. A high pressure source (4) provides an inert nitrogen or process gas through a pressure regulator (5) to the input of two or three mechanical or electronic mass flow controllers (6, 7, 8), powered by an external power supply (9), which control the bubble rate at each orifice through manual adjustments, or electronic set points determined by a computer software program, independent of the pressure in the vessel, reactor, or flow-through process pipe. One or more differential pressure transducers (10, 11) measures the pressure of bubbles being formed and released from the two orifices. A transducer demodulator circuit (12) converts the resulting fluctuating pressure signal directly to an equivalent fluctuating electrical DC voltage signal. This signal is input to a (13) computer using one or more plug-in analog input/output computer interface circuit boards (14). A software program tracks the differential waveform and captures the maximum differential bubble pressure which is directly proportional to fluid surface tension. A temperature probe (15) and/or other commercially available probe (such as conductivity, viscosity, or density) is immersed at the same level as the orifices to measure liquid temperature, and/or other process parameters. A pneumatic damper (16) smoothes the large orifice signal in the single transducer apparatus, whereas in a two transducer apparatus the average maximum values of the two individual, undampened, pressure signals are electronically substracted to provide the maximum differential bubble pressure which is directly proportional to fluid surface tension.
PCT/US1996/015923 1995-10-04 1996-10-03 Surface tension measurement in a pressurized environment Ceased WO1997013138A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US09/043,952 US6085577A (en) 1996-10-03 1996-10-03 Surface tension measurement in a pressurized environment
JP9514451A JPH11513492A (en) 1995-10-04 1996-10-03 Measurement of surface tension in pressurized environment
DE19681587T DE19681587C2 (en) 1995-10-04 1996-10-03 Measurement of surface tension in an environment under pressure

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US476395P 1995-10-04 1995-10-04
US60/004,763 1995-10-04

Publications (2)

Publication Number Publication Date
WO1997013138A2 WO1997013138A2 (en) 1997-04-10
WO1997013138A3 true WO1997013138A3 (en) 1997-08-21

Family

ID=21712409

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1996/015923 Ceased WO1997013138A2 (en) 1995-10-04 1996-10-03 Surface tension measurement in a pressurized environment

Country Status (3)

Country Link
JP (1) JPH11513492A (en)
DE (1) DE19681587C2 (en)
WO (1) WO1997013138A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6772103B1 (en) * 1996-12-19 2004-08-03 Dow Global Technologies Inc. Method for selecting a parts kit detail
CN120083917B (en) * 2023-12-01 2025-11-18 中国石油天然气股份有限公司 Natural gas odorizing agent injection device and method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3426584A (en) * 1967-03-24 1969-02-11 North American Rockwell Surface tension measuring instrument
US3765227A (en) * 1970-10-01 1973-10-16 J Campbell Apparatus for the determination of surface tension of liquids
US4416148A (en) * 1981-02-06 1983-11-22 Madison-Kipp Corporation Surface tensiometer
US4527421A (en) * 1984-01-13 1985-07-09 The Dow Chemical Company Dynamic surface tensiometry and method
EP0580004A1 (en) * 1992-07-06 1994-01-26 Hughes Aircraft Company Method and apparatus for detecting the position of liquid-liquid interfaces
US5406828A (en) * 1993-11-16 1995-04-18 Yellowstone Environmental Science, Inc. Method and apparatus for pressure and level transmission and sensing

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3426584A (en) * 1967-03-24 1969-02-11 North American Rockwell Surface tension measuring instrument
US3765227A (en) * 1970-10-01 1973-10-16 J Campbell Apparatus for the determination of surface tension of liquids
US4416148A (en) * 1981-02-06 1983-11-22 Madison-Kipp Corporation Surface tensiometer
US4527421A (en) * 1984-01-13 1985-07-09 The Dow Chemical Company Dynamic surface tensiometry and method
EP0580004A1 (en) * 1992-07-06 1994-01-26 Hughes Aircraft Company Method and apparatus for detecting the position of liquid-liquid interfaces
US5406828A (en) * 1993-11-16 1995-04-18 Yellowstone Environmental Science, Inc. Method and apparatus for pressure and level transmission and sensing

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
FAINERMAN V B ET AL: "The measurement of dynamic surface tension by the maximum bubble pressure method", COLLOID AND POLYMER SCIENCE, vol. 272, no. 6, June 1994 (1994-06-01), DE, pages 731 - 739, XP000614882 *

Also Published As

Publication number Publication date
DE19681587T1 (en) 1998-10-08
JPH11513492A (en) 1999-11-16
DE19681587C2 (en) 2003-08-14
WO1997013138A2 (en) 1997-04-10

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