On-line method for monitoring chloride levels in a fluid stream

Details On-line method for monitoring chloride levels in a fluid stream On-line method for monitoring chloride levels in a fluid stream

1992-11-18

1994-06-28

Johnston, Jill A.

Chemistry: analytical and immunological testing

Condition responsive control

210 962, 210739, 436124, 436125, 436149, 436150, 436151, 436175, 436177, 20415313, 204415, G01N 3508, G01N 3318, G01N 2700

Patent

active

053246659

ABSTRACT:
A method for monitoring automatically, on-line chloride content in a fluid stream in an oil refinery. Additionally, the present invention provides a method for neutralizing the acids resulting from the chloride in a fluid stream. Pursuant to the method, a fluid sample is collected. To the sample is added a sulfide scavenger that will react with the sulfide that is present to create a reaction product. The fluid is then passed to a reaction or measurement cell including a chloride specific electrode. Prior to contacting the chloride specific electrode, the fluid must pass through a membrane that prevents the reaction product from flowing therethrough. The fluid that flows through the membrane is allowed to contact the chloride specific electrode. This allows the chloride content to be monitored in the fluid. The concentration of chloride can then be used to generate a signal to control the addition of a neutralizing agent to the fluid stream.

REFERENCES:
patent: 4814281 (1989-03-01), Byers
patent: 4900427 (1990-02-01), Weers et al.
patent: 4942133 (1990-07-01), Pauly et al.
Laboratory Separation, Membrane Filtration, Chromatography Product Catalog, Amicon (a WR Grace Company) 1987, pp.52-53.

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