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:
Oct. 19, 2021
Filed:
Mar. 09, 2017
Heraeus Deutschland Gmbh & Co. KG, Hanau, DE;
Heraeus Precious Metal Technology (China) Co., Ltd., Jiangsu, CN;
Heraeus Site Operations Gmbh & Co. KG, Hanau, DE;
Christian Nowottny, Nidderau, DE;
Birger Lehr, Nidderau, DE;
Hartmut Janitz, Nidderau, DE;
Zhenggang Yu, Nanjing, CN;
Li Chen, Shanghai, CN;
HERAEUS DEUTSCHLAND GMBH & CO. KG, Hanau, DE;
HERAEUS PRECIOUS METAL TECHNOLOGY (CHINA) CO., LTD., Jiangsu, CN;
HERAEUS SITE OPERATIONS GMBH & CO. KG, Hanau, DE;
Abstract
A process for the treatment of acidic wastewater which comprises hydrochloric acid, nitric acid as an optional component, 0.1 to 30 wt.-% of one or more dissolved metals selected from the group consisting of aluminum and heavy metals other than precious metals, and 10 to 500 wt.-ppm of at least one dissolved precious metal, wherein the process comprises the successive steps (1) to (5):