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Nueva tecnología de concentración de metales nobles procedentes de residuos electrónicos


Oferta Tecnológica
Una pyme lituana especializada en reciclaje de residuos electrónicos (placas de circuito impreso y catalizadores empleados en las industrias de automoción y química) ha desarrollado una nueva tecnología para la concentración de metales nobles procedentes de residuos electrónicos de forma económica y ecológica. La aplicación de productos químicos ecológicamente seguros y tecnología de electrodeposición permite obtener un concentrado al 2-10% de Au, Ag, Pd. Se buscan socios con el fin de establecer acuerdos de colaboración técnica, licencia y comercialización con asistencia técnica.


Novel technology for noble metals concentration from raw waste
Lithuanian SME specialized in electronic waste recycling developed a new technology for concentration of noble metals in the e-waste in the economic and ecological way. By applying ecologically safe chemicals and electro-deposition offered technology enables to reach 2-10% concentrate of Au, Ag, Pd. The company is offering a technical collaboration, licensing and commercial agreement with technical assistance.
Electronic waste (printing circuit boards (PCBs), catalyzers used in automotive and chemical industry) is characterized by significant heterogeneity and relatively high complexity. The composition of such waste is very diverse with relatively low levels of precious metals being present as deposited coatings of various thicknesses in conjunction with copper, solders, various alloy composition, non-ferrous and ferrous metals.
Today, large scale companies use "acidic" method for separation non-targeting metals (Pb, Sn, Cu and etc.) and for recovery of noble metals. These technologies are expensive and requires additional equipment for utilization of toxic compounds. By using conventional technologies environmental damages are caused, during the recycling processes:
- Cyanide leaching has been in use since several decades for economic gold extraction although it is environmentally unfriendly.
- For recovery of platinum or palladium all the e-waste is treated by a mixture of hydrochloric and nitric acids that results in big amount of poisonous NO2 gas emmisions.
Lithuanian SME in cooperation with university developed new technology that is based on highly promising and innovative research and that has following new properties:
- Noble and accompanying metals are leached in controlled corrosion route into relatively small volume of solution using environmentally friendly compositions of oxidants and ligands (dissolved oxygen, compounds of Fe+3).
- Lead, tin and other accompanying metals are easily separated.
- Mixture of metals is concentrated by electrodeposit (instead of "wet chemical path") using electrochemical methods
- The concentrate produced by the offered technology might be treated in the convenient way in order to separate individual noble metals having purity ~99 %.
Advantages and Innovations:
- High selectivity and ease of control is offered by applying electrodeposit (instead of "wet chemical path").
- High efficiency of noble metals concentration. The results are highly encouraging because the concentration of noble metals are more than hundred times higher than in the raw e-waste (concentration of Pt, Pd, Ag, and Au is ~ 0,01%), i.e. from 1000 kg of waste is possible to accumulate 14 kg of concentrate using offered technology.
- Ecological - no cyanide or hydrochloric and nitric acids are needed for the process.
Stage of Development:
Available for demonstration
Secret know-how

Partner sought

Type and Role of Partner Sought:
- Type of partner sought:
Academia or industry

- Specific area of activity of the partner:
Electronic waste treatment and metal recovery.

- Task to be performed:
Further joint development and commercialization of the technology


Type and Size of Client:
Industry SME <= 10
Already Engaged in Trans-National Cooperation:
Languages Spoken:


Technology Keywords:
05004002 Extracción
02002012 Mezclado (polvo, etc), separación (clasificación, filtrado)
05004001 Procesos de filtración y con membranas
10003004 Reciclaje, recuperación
10002007 Tecnología / ingeniería medioambiental