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Inmovilización de contaminantes y sellado de rocas mediante cristalización dependiente del tiempo. Síntesis provocada de minerales

Resumen

Tipo:
Oferta Tecnológica
Referencia:
TODE20160805001
Publicado:
07/09/2016
Caducidad:
07/09/2017
Resumen:
Una pyme alemana ofrece soluciones de lechada para detención de flujos de agua, sellado de rocas y descontaminación en la industria minera. La síntesis mineral provocada es una nueva tecnología que forma minerales ligeramente solubles a partir de soluciones supersaturadas que permiten la fijación de contaminantes y la reducción de la permeabilidad de suelos y formaciones rocosas. Los metales descontaminantes pueden fijarse como sulfuros y permanecen in situ. La empresa busca socios industriales e investigadores con el fin de establecer acuerdos de investigación, cooperación técnica o servicio.

Details

Tittle:
Immobilization of contaminants and sealing of rock by using time dependent crystallization - Provoked mineral synthesis
Summary:
A German SME offers grouting solutions for water inflow stops/ sealing of rock and decontamination in mining industry. Using super saturated solutions is possible to precipitate natural occurring minerals, which reduce permeability of rock. The decontaminating metals can be fixed as sulphides and will remain in-situ. The SME is looking for partners from industry and research for a research cooperation agreement, technical cooperation, and/or a services agreement.
Description:
The German SME was founded 2003 and consists of a team of chemists, laboratory technicians and geotechnical engineers. It offering the application of the technology "provoked mineral synthesis" for solving geotechnical tasks as well as for immobilization of contaminants. This will include the adjustment of the composition to the defined conditions as well as the set up and if needed operating the plant for preparation and grouting of the solutions.

The offered "provoked mineral synthesis" is a new technology, which forms slightly soluble minerals from supersaturated solutions allowing the fixation of contaminants and the reduction of the permeability of soils or rock formations. Solutions containing high amounts of calcium sulphate, calcium carbonate or calcium hydroxide can be prepared by using special inhibitors, which prevent spontaneous crystallisation during the solution preparation. Inhibitors do not change the solubility, they stabilise temporarily concentrations high above the normal solubility of the minerals. Inhibitors enable, for example, the mixing of BaCl2 and Na2SO4 solutions as well as lime Ca(OH)2 slurries and diluted sulphuric acid without spontaneous BaSO4 and gypsum formation, respectively. Clear solutions are obtained with time dependent stability. The rate of precipitation can be directed by the degree of supersaturating, pH, temperature and type and concentration of the inhibitor. When supersaturated solutions are used as grout, time dependent crystallisation occurs within the penetrated soil or rock structures. The flow paths are closed systematic starting from the inner part. Reduction of permeability starts and will finished with sealing of the pore space or the crack. Contaminants are incorporated into the growing layers of slightly soluble minerals. Such processes can be used for preparation of solutions from which directed gypsum, anhydrite, BaSO4, CaCO3 or Ca (OH)2 formation takes place. All have in common that the setup of supersaturating, pH value and redox potential opens many possibilities to change contaminants into stable, non-dissolvable compounds. Organic degradation processes can be initiated simultaneously. One main fact is the formation of only naturally occurring minerals, which do not harm the treated formations.
Lab scale tested and field scale application has been successfully used several times, e.g. in Germany and Canada.

The company is looking for partners from industry for a license agreement, to transfer the rights to interested clients. Research institutions for a joint development for new solutions in this field are also highly welcome. Possible frame could build a technical cooperation and/or a research cooperation agreement. Especially for partners from the mining industry, e.g. owner of potash mining, the company can offer its specific technological knowhow.


Advantages and Innovations:
- sustainable, natural existing minerals are formed, no artificial materials needed;
- reduction of the permeability of soils or rock formations;
- fixation of contaminants ensured;
- special inhibitors are used to prevent spontaneous crystallisation (temporarily stabilised concentrations high above the normal solubility);
- in-situ treatment method

Stage of Development:
Already on the market
IPs:
Secret Know-how

Partner sought

Type and Role of Partner Sought:
The company is looking for partners from industry and research. For reason of the very wide application fields, there is no restriction with regard to the sectors. Highly welcome are industry partners in the fields of chemistry, mining, remediation, material science.
Role of the partner:
- transfer of the offered technology and/or knowhow
- joint development for new solutions/ applications

Client

Type and Size of Client:
R&D Institution
Already Engaged in Trans-National Cooperation:
Si
Languages Spoken:
English
German

Keywords

Technology Keywords:
10002011 Contaminación del terreno y de aguas subterráneas
09001002 Métodos e instalaciones de ensayo / análisis
05001003 Química inorgánica
10002007 Tecnología / ingeniería medioambiental
03008 Tecnologías mineras