Method For Recycling Used Or Waste Permanent Magnets

Abstract: The invention relates to a method for recycling used or waste permanent magnets and scrap from the production of such magnets, the method consisting, after demagnetising and reducing the permanent magnets to a powder, in completely oxidising this powder, then in dissolving the product resulting from this oxidation and finally in filtering this product. The oxidation is carried out in two consecutive sub-steps: ? a first sub-step of partial oxidation at a temperature of no more than 500°C; ? and then a second sub-step of complete oxidation at a higher temperature, and in particular at a temperature of between 600 and 800°C.

Patent Information

Application #

Filing Date

16 May 2025

Publication Number

21/2025

Publication Type

INA

Invention Field

METALLURGY

Status

Email

Parent Application

Applicants

CAREMAG

Tour Part Dieu 129 Rue Servient 69003 LYON

Inventors

1. BENGIO, David

32 Rue Gabriel Pér 69100 VILLEURBANNE

Specification

Documents

Application Documents

#	Name	Date
1	202537047152-TRANSLATIOIN OF PRIOIRTY DOCUMENTS ETC. [16-05-2025(online)].pdf	2025-05-16
2	202537047152-STATEMENT OF UNDERTAKING (FORM 3) [16-05-2025(online)].pdf	2025-05-16
3	202537047152-REQUEST FOR EXAMINATION (FORM-18) [16-05-2025(online)].pdf	2025-05-16
4	202537047152-PRIORITY DOCUMENTS [16-05-2025(online)].pdf	2025-05-16
5	202537047152-POWER OF AUTHORITY [16-05-2025(online)].pdf	2025-05-16
6	202537047152-FORM 18 [16-05-2025(online)].pdf	2025-05-16
7	202537047152-FORM 1 [16-05-2025(online)].pdf	2025-05-16
8	202537047152-DRAWINGS [16-05-2025(online)].pdf	2025-05-16
9	202537047152-DECLARATION OF INVENTORSHIP (FORM 5) [16-05-2025(online)].pdf	2025-05-16
10	202537047152-COMPLETE SPECIFICATION [16-05-2025(online)].pdf	2025-05-16
11	202537047152-Proof of Right [17-06-2025(online)].pdf	2025-06-17
12	202537047152-FORM 3 [20-09-2025(online)].pdf	2025-09-20