Method and apparatus for determining the total oxygen demand of

Details Method and apparatus for determining the total oxygen demand of Method and apparatus for determining the total oxygen demand of

1973-04-26

1976-01-20

Reese, Robert M.

Chemistry: physical processes

Physical processes

Crystallization

23253PC, 204 1T, 204195S, B01K 100, G01N 2752, G01N 3112, G01N 3318

Patent

active

039334295

ABSTRACT:
A process and apparatus for determining total oxygen demand of combustible materials in aqueous dispersion. The total oxygen demand is determined as the difference in concentration of oxygen within two feed gas streams composed of an inert gas containing oxygen; the first feed gas stream serving as the reference and the second feed gas stream serving as the combustion supporting one, which passes through a combustion conduit having a porous catalyst bed and contained within a combustion zone which is heated to a combustion supporting temperature. A small sample of the combustible material in aqueous dispersion is injected into the combustion supporting feed gas stream in advance of the catalyst bed within the combustion zone. As the sample is swept through the combustion conduit, the combustible materials in aqueous dispersion are burned. The effluent gas stream is directed through a continuous differential oxygen detection device and an electrical signal corresponding to the total oxygen demand for burning the combustible materials is generated.

REFERENCES:
patent: 3205045 (1965-09-01), Von Lossberg
patent: 3252759 (1966-05-01), Simon
patent: 3464797 (1969-09-01), Hagopian
patent: 3567388 (1971-03-01), Kapff
patent: 3597345 (1971-08-01), Hickam et al.
patent: 3650934 (1972-03-01), Hickam et al.
patent: 3679364 (1972-07-01), Teal et al.
patent: 3819499 (1974-06-01), Johannes

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