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1. (WO2018099243) NOX ABATEMENT METHOD FOR PRECIOUS METAL REFINERY AND RECYCLING PROCESSES

Pub. No.:    WO/2018/099243    International Application No.:    PCT/CN2017/109342
Publication Date: Fri Jun 08 01:59:59 CEST 2018 International Filing Date: Sat Nov 04 00:59:59 CET 2017
IPC: B01D 53/56
Applicants: HERAEUS PRECIOUS METAL TECHNOLOGY (CHINA) CO., LTD.
HERAEUS SITE OPERATIONS GMBH & CO. KG
Inventors: NOWOTTNY, Christian
YU, Zhenggang
LI, Wengang
Title: NOX ABATEMENT METHOD FOR PRECIOUS METAL REFINERY AND RECYCLING PROCESSES
Abstract:
A process for NOx removal wherein an aqueous liquid, at least one gaseous and/or at least one liquid oxidant, and a NOx-containing off-gas are fed into a venturi mixing unit (1), thereby obtaining a turbulent aqueous reaction zone in the venturi mixing unit (1), and a HNO3-enriched aqueous liquid leaves the venturi mixing unit (1).