Patent · US Active

Method for recovering lead oxide from waste lead paste

US10135100B2 · kind B2 · utility

0Cited by

3References

7Claims

0Family size

Assignee

Beijing University of Chemical Technology · CN

Inventors

Junqing Pan · 罗泉乡, CN
Yaru Bian · Beijing, CN
Yanzhi Sun · Beijing, CN
Yinjian Niu · 罗泉乡, CN

Key dates

Filing date	Jun 10, 2015
Grant date	Nov 20, 2018
Priority date	—
Expiry date	Jun 10, 2035

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02W30/84
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A method for recovering lead oxide from a pre-desalted lead paste, comprising the following steps: a. dissolving the pre-desalted lead plaster by using a complexing agent solution, and making all of PbO therein react with the complexing agent to generate lead complexing ions, obtaining a lead-containing solution and a filter residue; b. adding a precipitant to the lead-containing solution, and then the precipitant reacting with the lead complexing ions to generate a lead salt precipitate and the regenerated complexing agent; c. calcining the lead salt precipitate to obtain lead oxide and regenerate the precipitant. The final recovery rate of lead oxide of the method can reach 99% or more.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.