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US 2002/0000535 A1Published application
Field test apparatus for analysis of coolants and heat-exchange fluids
AssigneeTexaco Inc.
InventorsJean-Pierre Maes, Peter Roose, Filip Van Kenhove
Life of this patent
Estimating the term…
Abstract
A test method and apparatus for determining the content of carboxylic acid-based corrosion inhibitors in a coolant or heat exchange fluid. The amount of acidic reagent added to the coolant or fluid between two pH equilibrium points is measured to determine the amount of inhibitors. The refractive index can be measured to determine the amount of freezing point depressant.
Claims27
A method for determining a content of a material, comprising:
- (a) agitating a sample comprising a predetermined amount of the material while adding an acidic reagent at a constant rate,
- (b) measuring a pH of the agitated sample while the acidic reagent is added;
- (c) determining a first equilibrium point (EP1) demonstrated by a first rapid drop in pH;
- (d) continuing addition of the acidic reagent and measuring the pH until a second equilibrium point (EP2), demonstrated by a second rapid drop in pH, is reached;
- and
- (e) determining an amount of carboxylic acid-based corrosion inhibitor in the sample from an amount of acidic reagent added between EP1 and EP2.
3 more elements
An apparatus for determining a content of a material comprising:
- a vessel configured to contain a sample of the material;
- a first reservoir configured to contain a reagent;
- a second reservoir configured to contain a treatment fluid;
- a first pump configured to transfer reagent from the first reservoir to the vessel;
- a second pump configured to transfer treatment fluid from the second reservoir to the vessel;
- a pH electrode configured to measure a pH of the sample;
- and
- a means, coupled to said pH electrode, for controlling said first pump and said second pump responsive to the measured pH.
5 more elements
Dependencies are inferred from the claim text.