US 2010/0071507 A1 · NOVEL PRE-TREATMENT PROCESS FOR LIBERATION OF METALS FROM WASTE PRINTED CIRCUIT BOARDS USING ORGANIC SOLUTION

Abstract

The present invention relates to a method for recovering valuable metals contained in printed circuit boards of waste electronic machine, and more particularly, to a method for recovering valuable metals from waste printed circuit boards by separating several plastic layers laminated using an organic solution and then separating plastic components from metal components using an electrostatic separation process. According to the present invention, it is possible to separate the non-metal containing the plastic components and the metal components from the waste printed circuit boards by separating the several plastic layers laminated via simple pre-process using an organic solvent and obtain the metal recovery ratio of 99.99% via the pre-process and an electrostatic separation process.

Claims4

Dependent claims

A method for recovering metal from waste printed circuit boards, comprising steps of:

(a) causing a liberation of the metal and plastic from the cut waste printed circuit boards by stirring the waste printed circuit boards after putting them into an organic solvent;
(b) cleaning and drying the metal and the plastic after separating the metal and the plastic by filtering them out;
and
(c) recovering the metal from a mixture of the metal and the plastic dried using an electrostatic separation process.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

12/310,324Filed 28 Jul 2008

Priority

KR 10-2007-011699216 Nov 2007

Published

25 Mar 2010

Term ends

Not estimatedThe source records don’t support an estimate.

Classification13 codes

H05K 3/22
Apparatus or processes for manufacturing printed circuits: secondary treatment of printed circuits
C22B 7/005
Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or…:…
C22B 7/006
Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or…: wet…
H05K 2203/0783
Characterised by the specific liquids involved: using solvent, e.g. for cleaning; Regulating solvent content of pastes or coatings for adjusting…

Novel pre-treatment process for liberation of metals from waste printed circuit boards using organic solution

Life of this patent

Novel pre-treatment process for liberation of metals from waste printed circuit boards using organic solution

Life of this patent

Abstract

Claims4