Method for cleanly extracting metallic silver

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11566333
SERIAL NO

16647530

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

A method for cleanly extracting metallic silver includes: mixing an acidic solution containing Ce4+ and NO3− with a silver-containing material for leaching; after the leaching is completed, carrying out a solid-liquid separation to obtain a leaching solution containing Ce3+ and Ag+; and electrolyzing the leaching solution, wherein an oxidation reaction of Ce3+ occurs at an anode to realize a regeneration of Ce4+ and an electrolytic reduction occurs at a cathode to reduce Ag+ to obtain the metallic silver. Ce4+ is used as a leaching agent and an intermediate oxidant to implement a cyclic operation of solution leaching and electrolytic regeneration on the silver-containing material. Almost no NOx and waste liquid are caused by the extraction process, and the invention is clean and environmentally friendly.

Loading the Abstract Image... loading....

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

Patent OwnerAddress
INSTITUTE OF PROCESS ENGINEERING CHINESE ACADEMY OF SCIENCES100190 NORTH TWO STREET ZHONGGUANCUN HAIDIAN DISTRICT BEIJING 1 BEIJING CITY BEIJING CITY 100190

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Dong, Xulong Beijing, CN 1 0
Qi, Tao Beijing, CN 75 188
Zhang, Hui Beijing, CN 899 8264

Cited Art Landscape

Load Citation

Patent Citation Ranking

Forward Cite Landscape

Load Citation

Maintenance Fees

Fee Large entity fee small entity fee micro entity fee due date
3.5 Year Payment $1600.00 $800.00 $400.00 Jul 31, 2026
7.5 Year Payment $3600.00 $1800.00 $900.00 Jul 31, 2030
11.5 Year Payment $7400.00 $3700.00 $1850.00 Jul 31, 2034
Fee Large entity fee small entity fee micro entity fee
Surcharge - 3.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 7.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00