Chemistry of inorganic compounds – Sulfur or compound thereof – Oxygen containing
Reexamination Certificate
2007-09-25
2007-09-25
Vanoy, Timothy C. (Department: 1754)
Chemistry of inorganic compounds
Sulfur or compound thereof
Oxygen containing
C423S531000
Reexamination Certificate
active
11408180
ABSTRACT:
A method for decoloring sulfuric acid containing organic reatives by which it is possible to obtain a crystalline sulfuric acid having a color index of less that 30 APHA unities, by adding controlled amounts of potassium chlorate and hydrogen peroxide in a controlled environment.
REFERENCES:
patent: 3856673 (1974-12-01), De La Mater et al.
patent: 4085016 (1978-04-01), Janjua et al.
patent: 4257986 (1981-03-01), Milligan et al.
Aviña Vielma Saul
Gonzalez Ramirez Jesús Ariel
Macias Horta José Antonio
Medina Herrera Mauro
Servicios Industriales Penoles S.A. de C.V.
Vanoy Timothy C.
Young & Thompson
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