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:
Feb. 22, 1977
Filed:
Oct. 11, 1974
Applicant:
Inventors:
Buntaro Kawase, Tokyo, JA;
Iwao Kojima, Yokohama, JA;
Juichi Kasai, Fujisawa, JA;
Keiji Kawasaki, Tokyo, JA;
Assignee:
Showa Denko Kabushiki Kaisha, Tokyo, JA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
423210 ; 75121 ;
Abstract
A method of removing mercury vapor from a gas contaminated therewith comprising washing said gas with an acid solution of divalent mercury ions, the concentration of which ranges from 0.5 to 100g per liter, at room temperature and atmospheric pressure; and rewashing the resultant gas with an acid solution of divalent mercury ions, the concentration of which ranges from 0.05 to 0.5g per liter, at room temperature and atmospheric pressure to obtain a purified gas containing mercury vapor of less than 0.01 mg/Nm.sup.3, that is, 0.001 ppm.