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:
Nov. 10, 2015
Filed:
May. 30, 2012
Hiroyuki Asada, Tokyo, JP;
Yoshikazu Yatsu, Tokyo, JP;
Hiroyuki Asada, Tokyo, JP;
Yoshikazu Yatsu, Tokyo, JP;
KURITA WATER INDUSTRIES LTD., Tokyo, JP;
Abstract
A method and an apparatus for treating coal gasification wastewater containing selenium and ions of a metal nobler than titanium eluted from a noble metal catalyst in a catalytic wet oxidation treatment using the noble metal catalyst, the method includes a pretreatment process removing the ions of the metal nobler than titanium and a selenium reduction process contacting the coal gasification wastewater with a mixture of metallic titanium and a simple metal baser than metallic titanium whereby a portion of the simple metal baser than metallic titanium is eluted, and the selenium in the coal gasification wastewater becomes reduced.