Patent · US Expired

Method of processing small batteries

US4775107A · kind A · utility

8Cited by

1References

6Claims

0Family size

Assignee

Metallgesellschaft AG · DE

Inventors

Rudolf Heng · Oberursel, DE
Walter Koch · Rüti, CH
Hartmut Pietsch · Bad Homburg vor der Höhe, DE

Key dates

Filing date	Apr 21, 1987
Grant date	Oct 4, 1988
Priority date	—
Expiry date	Apr 21, 2007

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S241/38
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A mechanical disintegration is effected in which substantially only the metal sheath of the small batteries is torn apart. The crushed material is roasted at 500.degree. to 1000.degree. C. in a state of motion in an oxidizing atmosphere and the volatilized mercury is recovered from the exhaust gas. The roasted material is separated by sieving and magnetic separation into an iron-containing scrap fraction, a brass-containing scrap fraction and a collectable fraction, which contains manganese, zinc and silver.

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