Selective extraction of lithium from black mass

WO2026149868A1PCT designated stage Publication Date: 2026-07-16BASF SE
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
BASF SE
Filing Date
2026-01-05
Publication Date
2026-07-16

AI Technical Summary

Technical Problem

Existing hydrometallurgical methods for recycling lithium-ion batteries suffer from high acid and reducing agent consumption, low selectivity, and lithium recovery is often delayed, leading to significant losses.

Method used

A method involving mixing black mass powder with sulfuric acid in a reaction kettle, heating to 200-250°C under 15-35 bar pressure for 1-5 hours without additional reducing agents, to form a mixed slurry for selective lithium extraction.

Benefits of technology

Improves lithium recovery and leaching selectivity, reducing transition metal contamination, and enhances the efficiency of lithium extraction from lithium-ion battery materials.

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Patent Text Reader

Abstract

The present disclosure provides a method for selectively extracting lithium from black mass derived from lithium ion battery materials.
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