METHOD OF DETERMINING CHEMICAL OXYGEN MINIMUM IN CIRCULATING WATER- SUPPLY SYSTEM UTILIZED IN PHENOL, ETHYLBENZENE, AND ISOPROPYLBEZENE PRODUCTION Russian patent published in 1998 - IPC

Abstract RU 2123691 C1

FIELD: analytical methods. SUBSTANCE: invention aims at increasing rapidity in determining leakage in process equipment. Chemical oxygen minimum in circulating water is determined via oxidation by aqueous solution of potassium bichromate, silver sulfate, mercury sulfate, sulfuric acid, and phosphoric acid under boiling. Optimal volume ratio of sulfuric acid, phosphoric acid, and water in oxidative solution is 1.5:1:3, optimum boiling time 20 min. EFFECT: reduced analysis time. 2 tbl

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RU 2 123 691 C1

Authors

Terent'Ev V.S.

Anfinogenova T.S.

Gal'Chenko E.P.

Puchkova N.I.

Kasatkina A.A.

Dates

1998-12-20—Published

1997-06-30—Filed