HydroS


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MetOxs has developed a highly innovative, efficient and fast process to produce H2S (g) where sodium hydroxide (NaOH), elemental sulfur (S) and water (H2O). This process is called HydroS and has the characteristic of a lower cost of production that the existing processes and this will depend exclusively on the cost of the reactants.

Hydrogen sulphide (H2S) can be easily used for the precipitation of metals that are in solution. For this purpose the use of H2S generally leads to better metal removal effiency and generates a more compact, stable and reusable product unlike the respective hydroxides and carbons that are generated with traditional methods.

Although precipitation through the use of hydrocides is widely used in the industry for the removal of metals, precipitation of sulfides offers certain advantages including the formation of metal sulphides with low solubility, selective removal of metals, rapid reaction rates, sedimentation and the potential to reuse sulfides precipitated by smelting.

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MetOxs has developed a highly innovative, efficient and fast process to produce H2S (g) where sodium hydroxide (NaOH), elemental sulfur (S) and water (H2O). This process is called HydroS and has the characteristic of a lower cost of production that the existing processes and this will depend exclusively on the cost of the reactants.

Hydrogen sulphide (H2S) can be easily used for the precipitation of metals that are in solution. For this purpose the use of H2S generally leads to better metal removal effiency and generates a more compact, stable and reusable product unlike the respective hydroxides and carbons that are generated with traditional methods.

Although precipitation through the use of hydrocides is widely used in the industry for the removal of metals, precipitation of sulfides offers certain advantages including the formation of metal sulphides with low solubility, selective removal of metals, rapid reaction rates, sedimentation and the potential to reuse sulfides precipitated by smelting.

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Technical Description

During the reaction mechanism sodium slfate (Na2So) is formed which acts as an oxygen sequesterin medium, allowing the release of the hydrogen necessary to combine with the sulfur and forming the H2S (g) molecule. Hydrogen released comes both from the content of sodium hydroxide as part of that found in water. As far as sodium sulphate is concerned, the pressure reactor is released by means of a small purge which maintains it controlled and then crystallized out of the reactor.

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Advantages of HydroS

  • HydroS requires minimal initial investment
  • HydroS is very simple and can be implemented in-situ without any problems, regardless of the capacity of the plant.
  • It uses moderate temperatures and pressures.
  • It does not require special installations to produce Hydrogen which makes the system very complex
  • HydroS is very safe, cooling the system suffices to stop the production of H2S

HydroS Applications


Electroplating Industry

Mining Industry

Textile Industry

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The mining industry generates effluents with heavy metals or solutions rich in metals, which can be recovered or removed by chemical precipitation by HydroS. Some examples are:

  • Precipitation of Copper (Cu)
  • Precipitation of impurities such as Arsenic (As)

In the metal plating industry, a large amount of effluents are generated which contain heavy metals such as lead, silver, copper, zinc, tin and nickel.  

From the manufacture of fabrics to the finishing of leather, the textile industry uses dyes and pigments that cause water pollution due to its high content of heavy metals such as cadmium, lead, mercury and copper.

Electroplating Industry

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The mining industry generates effluents with heavy metals or solutions rich in metals, which can be recovered or removed by chemical precipitation by HydroS. Some examples are:

  • Precipitation of Copper (Cu)
  • Precipitation of impurities such as Arsenic (As)

Mining Industry

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In the metal plating industry, a large amount of effluents are generated which contain heavy metals such as lead, silver, copper, zinc, tin and nickel.  

Textile Industry

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From the manufacture of fabrics to the finishing of leather, the textile industry uses dyes and pigments that cause water pollution due to its high content of heavy metals such as cadmium, lead, mercury and copper.

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