pH control of a process stream

Details pH control of a process stream pH control of a process stream

1981-10-05

1988-08-09

Marcus, Michael S.

Chemistry: analytical and immunological testing

Condition responsive control

422 62, 422108, 422111, 436163, G05D 2100, G05D 700

Patent

active

047627964

ABSTRACT:
The invention features a unique pH control system and method for maintaining the proper pH in a continuous process stream. The system backmixes a sample stream, which decreases the dynamic gain of the control system, and which allows for the ease of adding a controlled amount of reagent or buffer to the process stream on a continuous basis.

REFERENCES:
patent: 3069242 (1962-12-01), Brooks et al.
patent: 3180699 (1965-04-01), Ballestra
patent: 3791793 (1974-02-01), Friedmann et al.
patent: 4033871 (1977-07-01), Wall
patent: 4121767 (1978-10-01), Jensen
patent: 4164547 (1979-03-01), Simko
patent: 4181951 (1980-01-01), Boeke
patent: 4224283 (1980-09-01), Potts
Perry, Chemical Engineers' Handbook, 1973, 21-25.
Instruments & Control Systems, Jan. 1976, vol. 49, No. 1, "Flue-Gas Scrubbing, Part II: Control Systems" by F. C. Shinskey.

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