Method of controlling the amount of chemicals in liquids used wi

Details Method of controlling the amount of chemicals in liquids used wi Method of controlling the amount of chemicals in liquids used wi

1974-10-17

1976-06-08

Bashore, S. Leon

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

With testing, sampling or analyzing

162 50, 162238, 162252, 162263, 162DIG10, 252186, 252187R, 2521883CL, 25230116, 356181, D21C 714

Patent

active

039620298

ABSTRACT:
A method is provided for controlling the amount of oxidizing bleaching agents in liquors used within the cellulose industry, as in the bleaching of sulphite, sulphate, mechanical, chemimechanical, semichemical or similar cellulose pulps, and in related industries, and particularly for controlling the addition of oxidizing bleaching agents to the system during the bleaching of cellulose pulp by mixing such liquor with at least one chemiluminescent reagent which reacts with the oxidizing bleaching agents in a manner to emit light. The amount of oxidizing bleaching agents in the liquor is then determined by comparison of the light intensity thus obtained with the light intensity for previously measured calibration values corresponding to known quantities of such oxidizing bleaching agents, and then from such determination controlling the addition of such oxidizing bleaching agents to the liquor.

REFERENCES:
patent: 3366572 (1968-01-01), Scott et al.
patent: 3539794 (1970-11-01), Rauhut et al.

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