The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 18, 1995
Filed:
Oct. 23, 1992
Richard L Wilson, Mulvane, KS (US);
David A Hildebrand, Wichita, KS (US);
Vulcan Chemicals, Birmingham, AL (US);
Abstract
An improvement is provided in a process for the preferential removal of chlorine from an aqueous solution of chlorine dioxide and chlorine which has been prepared by the process of reducing a chlorate with a reducing agent in a strong acid, and wherein the gases produced thereby are dissolved in water. The improvement comprises the step of adding hydrogen peroxide, oxalic acid or a salt of oxalic acid, to a cool (i.e. at a temperature of about 0.degree. C. to about 25.degree. C.) aqueous solution of the chlorine within a period of less than 2.5 hours dioxide and chlorine. Substantially all of the chlorine is destroyed with almost no destruction of the chlorine dioxide.