Method for treating electroplating wastewater

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12264089
SERIAL NO

18884219

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

A method for treating electroplating wastewater includes: performing a cyanide primary treatment on to-be-treated cyanide containing wastewater in a treatment tank by using a chlor-alkali process; performing a cyanide secondary treatment on the wastewater after cyanide primary treatment by controlling an addictive amount of chromium containing wastewater and adding acid liquor for adjusting a pH value of the wastewater to a preset acidity range; performing a hexavalent chromium reduction treatment on the wastewater after the cyanide secondary treatment by adding acid liquor for adjusting a pH value of the wastewater to a preset acidity range and adding a sulfite solution; and performing neutralization flocculation, solid-liquid separation, and sand filtration on the wastewater after the hexavalent chromium reduction treatment sequentially to obtain dischargeable water meeting a preset standard. The method can effectively remove harmful substances such as cyanide, chromium, copper and zinc, to thereby reduce environmental pollution and save treatment costs.

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

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

Patent OwnerAddress
NANCHANG HANGKONG UNIVERSITY330063 NO 696 FENG NAN ROAD JIANGXI NANCHANG NANCHANG CITY JIANGXI PROVINCE 330063

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chen, Huanhai Nanchang, CN 1 0
Zhang, Fan Nanchang, CN 973 7171
Zhang, Jun Nanchang, CN 1152 7034

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 Oct 1, 2028
7.5 Year Payment $3600.00 $1800.00 $900.00 Oct 1, 2032
11.5 Year Payment $7400.00 $3700.00 $1850.00 Oct 1, 2036
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