Method for recycling lead paste in spent lead-acid battery
US11196107B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 2019 |
| Grant date | Dec 7, 2021 |
| Priority date | — |
| Expiry date | Apr 23, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/84
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The disclosure discloses a method for recycling lead paste in a spent lead-acid battery, comprising: (1) pretreating lead paste in a spent lead-acid battery as a raw material under vacuum; mixing the pretreated lead paste with a chlorination reagent to obtain reactants; and heating the reactants under vacuum to carry out a chlorination volatilization reaction, so that lead element in the pretreated lead paste is combined with chlorine element in the chlorination reagent to form lead chloride, which is then volatilized, and after the reaction is completed, chlorination residue and a crude lead chloride product are obtained by condensation and crystallization after volatilization; (2) purifying the crude lead chloride product obtained in the step (1) under vacuum to obtain a refined lead chloride product. The disclosure improves the overall process flow of the recycling method as well as parameter conditions of the respective steps thereof, and can effectively solve the problem of serious pollution in lead paste recycling in the prior art.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.