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Developer of a device that purifies diluted inorganic acids contaminated by metal ions seeks commercial agreement with technical assistance

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Partner keyword: 
Surface treatment (painting, galvano, polishing, CVD, ..)
Coatings and adhesives manufactures
Speciality metals (including processes for working with metals)
Industrial chemicals
Speciality/performance chemicals
Machine tools, other metal working equipment (excl. numeric control)
Other research and experimental development on natural sciences and engineering


A Czech company that focuses mainly on research and innovation activities in the field of membrane processes, offers a device suitable to purify diluted inorganic acid, contaminated by metal ions and thus reuse the acid in technological processes. The technology is suitable particularly in industries with high use of diluted inorganic acids e.g. in the metal surface treatment industry. The company is looking for partners for commercial agreement with technical assistance.



Currently inorganic acids like, for example sulphuric acid, are being contaminated during their use in treatments of metal surfaces. Their liquidation is challenging and costly. For example, standard method of purification – retardation/passivation – consumes 40% more water while wastewater is roughly 40% more contaminated by the acid.

The novel technology on offer is particularly effective in recovering the electrolyte - diluted inorganic acid (e.g. H₂SO₄) is after technological process of passivation contaminated by residues of treated metal (e.g. Al₂(SO₄)₃ when aluminium is treated). Contaminated electrolyte needs to be replaced and liquidated.

By diffusion dialysis metal ions dispersed in electrolyte are separated by membrane into water which leads to the electrolyte´s purification. The final outcome is purified electrolyte up to 90%, solid waste (salts) and waste water, containing most of the metal ions. Solid salts can be stocked in the dump or disposed by a professional company. Water can be treated by waste water treatment plant.

The technology is tested for purification of the sulphuric acid, hydrochloric acid and nitric acid.
The company is looking for a partner active in metal surface treatment industry for collaboration on installation and commissioning of the technology on the basis of a commercial agreement with technical assistance.

Advantages & innovations

Cooperation plus value: 
The process is highly efficient and environmentally friendly. Compared to the purification of the same volume of acid by the standard method of purification - retardation, diffusion dialysis consumes 40% less water, wastewater is for 40% less contaminated by the acid, the amount of solid waste is reduced by about 15%. Operating costs for cleaning are significantly reduced by about 41%. The company offers detailed testing of the customer's waste acid for the suitability for cleaning by diffusion dialysis.

Stage of development

Cooperation stage dev stage: 
Already on the market

Partner sought

Cooperation area: 
The ideal partner is an engineering company dealing with surface treatment of metal parts or other industrial field with high use of diluted acids. The partner will apply the technology for waste acids cleaning based on a commercial agreement with technical assistance.

Type and size

Cooperation task: 
SME 11-50,SME <10,SME 51-250


Dissemination sector group : 
Dissemination preferred : 
Belarus, Bulgaria, Estonia, Latvia, Lithuania, Moldova, Poland, Romania, Russia, Slovakia


Diffusion dialysis schema


Diffusion dialysis unit