Global Patent Index - EP 1217359 A9

EP 1217359 A9 2002-09-04 - Method for determining the fouling tendency of a liquid and quartz microbalance for using the method

Title (en)

Method for determining the fouling tendency of a liquid and quartz microbalance for using the method

Title (de)

Verfahren zur Feststellung der Verschmutzungsanfälligkeit von Flüssigkeiten und Quarzmikrowaage zu deren Durchführung

Title (fr)

Procédé de mesure du pouvoir entartrant d'un liquide et microbalance à quartz pour la mise en oeuvre de ce procédé

Publication

EP 1217359 A9 (FR)

Application

EP 01403308 A

Priority

FR 0016696 A

Abstract (en)

[origin: EP1217359A1] Measuring the furring capacity of a liquid in contact with a substantially hotter wall, e.g. of a heat exchanger pipe, uses a micro-balance (10) with a quartz vane (11) and two electrodes - an upper excitation electrode (12) or working electrode, and a lower excitation electrode (14). The two electrodes are connected to an oscillator (55) which vibrates the quartz vane at one of its resonance frequencies. The micro-balance, located in a cell through which the furring liquid is continuously circulated, also has a heating system (20, 22, 56) for the lower electrode, a system (12, 24, 58) for continuously measuring the temperature of the working electrode, a heat regulator (61) to maintain its temperature at the actual temperature of the liquid employed, and a continuous vibration frequency meter for the quartz vane. The temperature measuring system comprises a thermocouple with two electrodes, one being the working electrode (12) and the other of a different metal forming a junction with it.

IPC 1-7 (main, further and additional classification)

G01N 27/00

IPC 8 full level (invention and additional information)

G01N 17/00 (2006.01); G01N 27/00 (2006.01)

CPC (invention and additional information)

G01N 29/036 (2013.01); G01N 17/008 (2013.01); G01N 2291/0256 (2013.01)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

EPO simple patent family

EP 1217359 A1 20020626; EP 1217359 A9 20020904; FR 2818380 A1 20020621; FR 2818380 B1 20030404

INPADOC legal status


2008-09-24 [18D] APPLICATION DEEMED TO BE WITHDRAWN

- Effective date: 20080408

2007-12-26 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20071126

2003-03-19 [AKX] PAYMENT OF DESIGNATION FEES

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

2002-12-11 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20021009

2002-06-26 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

2002-06-26 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO:

- Free text: AL;LT;LV;MK;RO;SI