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:
Sep. 02, 1980
Filed:
Sep. 29, 1978
Masao Matsumoto, Tokushima, JP;
Isao Manabe, Tokushima, JP;
Otsuka Chemical Co., Ltd., Osaka, JP;
Abstract
A process for disoxidating a gas which comprises contacting a gas being inert to hydrazines with a solution containing (A) at least one of hydrazines and (B) at least one of (i) quinones having a first half-wave potential of not more than -650 mV against a saturated calomel electrode at 25.degree. C. in acetonitrile in the case of employing 0.1 N tetraethylammonium perchlorate as an indicating electrolyte, and (ii) hydroquinones being the reduced forms of the foregoing quinones, and if desired, (C) an alkali agent. According to the process, the oxygen in a gas is removed in a high efficiency at a low cost without disadvantages such as the accumulation of nonvolatile materials and the limitation in the capacity of absorbing oxygen. A process for disoxidating water which comprises the steps of (I) disoxidating a gas being inert to hydrazines and water by contacting the gas with a solution containing (A) at least one of hydrazines, (B) at least one of the above-mentioned quinones and hydroquinones, and (C) an alkali agent, (II) contacting the disoxidated gas as it is or after purified with a water containing a dissolved oxygen to remove the large portion of the oxygen from the water, and (III) removing a slight amount of the oxygen remaining in the treated water by adding a nonvolatile disoxidant in an amount corresponding to that of the residual oxygen. According to the process, the dissolved oxygen in water is removed in a high efficiency at a low cost without the formation of toxic or corrosive volatile materials and the accumulation of nonvolatile materials.