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Other innovative ideas

Kisuma Chemicals always welcomes initiatives for joint developmentKisuma Chemicals is interesed to discuss all innovative ideas with Layered Double Hydroxides or other specialty magnesium compounds. Here are some ideas that might give you inspiration for your own developments:

  • Increased acid resistance of articles by hydrotalcites
  • Hydrotalcites as precursors for ceramics
  • Magnesium hydroxide as highly pure magnesium source for chemicals or ceramics
  • Hydrotalcites as advanced anode materials for batteries
  • LDH materials as pseudocapcitators
  • High aspect ratio Magnesium Hydroxide and Hydrotalcite to improve barrier properties of polymeric encapsulation solutions

If you are looking for a partner to upscale your innovative concepts based on hydrotalcite or other magnesium compounds, we are the company to go to. Contact our R&D department to start exploring the possibilities with us.

Sorbents

CO2 abatement with hydrotalciteLayered Double Hydroxides (LDH) are inorganic compounds with positively charged hydroxide layeres and charge balancing anions (and water molecules) in the interlayer region of the crystal structure. The interlayer anions are mobile, resulting in anion exchange properties. Based on factors such as pH and the available competitive anions, LDH can trap the competitive anion in its interlayer region and simultaneously release the anion that was originally incorporated in the material. The anion exchange properties of LDH makes this class of materials very suitable for use as regenerable sorbents. Possible applications include:

  • CO2 abatement
  • Recovery of valuable resources from water
  • Radioactive disposal systems
  • Remove SOx from flue gas

Kisuma Chemicals is interested to explore any collaboration project related to the application of hydrotalcites and other layered double hydroxide as adsorbents.

Contact our R&D

Please contact our R&D department for more information about this subject, or to explore the possibilities to establish a co-operation with Kisuma Chemicals.

 

Controlled release

Controlled release from LDHThe research and development team of Kisuma Chemicals is aware about the possibilities of using layered double hydroxides such as hydrotalcites for the encapsulation and controlled release of active (anionic) substances. Kisuma Chemicals would like to establish co-operations with parties who are, like us, interested to explore the potential of this concept.

Layered Double Hydroxides are anionic clays, consisting of alternating stacked cationic layers and charge compensating anions (and water molecules) in the interlayer region. The most common interlayer anion is CO32-, but NO3-, Cl- and SO42- are also well known interlayer anions. More complex, organic anions can also be incorporated, replacing the initial anions. Materials with these interlayers can be obtained by direct co-precipitation, anionic exchange or reconstruction of the layered structure from calcined derivatives of the original materials.

The above described characteristics make these materials very suitable for usage as inorganic containers for storage and triggered release of functional anionic species. Applications for this technology include:

  • Drugs can be incorporated in the LDH interlayer and released controllably. While inside the LDH, the drug molecules are protected against biological, chemical and thermodynamic degratation which increases long-term stability.
  • Anti-corrosive anions can be incorporated in the LDH interlayer, which creates a dual effect during excellerated corrosion tests. For example, when dispersed in a coating, LDH including an anti-corrosive species will trap corrosive anions (e.g. Cl-) and simultaneously release the corrosion inhibitor.

These are just examples, while many other applications might be opened by this technology. If you are interested to explore the possibilities, contact us today!

Contact our R&D

Would you like to know more about the possibilities of hydrotalcites and other layered double hydroxides for the controlled release of active substances? Contact our R&D department.  

 

Catalysts and Catalyst Supports

Hydrotalcite in catalysisOne of the key areas of interest for the research and development (R&D) department of Kisuma Chemicals is the use of hydrotalcites and other layered double hydroxides (LDH), including non-magnesium containing materials, in catalysis.

The drive in academia and industry to apply Layered Double Hydroxide (LDH) type materials in catalyst systems, apart from their reactivity, is threefold. Generally speaking LDHs are environmentally more benign than alternative catalyst systems (heavy metals), and potentially cheaper. The final reason is that LDHs are heterogeneous catalysts, greatly improving the ease of catalysts separation after reaction. Sometimes this heterogeneity is also cause for significant increases in reaction rate, due to the enzyme-like pre-adsorption of substrates on the catalyst surface.

Hydrotalcites may be used as such or they may be calcined to form mixed oxides that are useful catalysts. The materials are mainly applied because of their base properties, or as redox catalysts. Moreover, in the uncalcined form, hydrotalcites can be used as catalyst supports, and this confers to these materials an even wider spectrum of activities and selectivities.

HTs have anion-exchange capacity. A second characteristic of HTs is that they behave as solid bases. Whereas for the hydrated material, the active base sites are mainly structural hydroxyl anions, strong Lewis basic O2-–Mn+ pairs are present in completely water-free calcined materials. The basicity is affected by the calcination procedure, typically at 400-500 °C, and by structural and compositional parameters. Cations like Zn or Ni give less basicity than Mg; less basic catalysts are also obtained from Cl- or SO42- precursors than from CO32- - or OH--containing materials. The basicity also depends on the Mg/Al ratio. It has been reported that the total number of basic sites increases by decreasing the Mg/Al ratio, but the portion of strong basic sites decreases. The correlation of the HT basic properties with the Mg/Al ratio, however, is not always straightforward.

As mentioned before not all LDHs are suitable for all reaction types. Broadly speaking there are three types of catalyst system for which LDHs can be used:

-     Redox Catalyst: Various LDHs have been reported to be active as oxidation or reduction catalysts. These types are generally types including copper or a heavy metal.

-     Acid/Base catalyst: The unique structure of the Mg/Al HTs allows for a highly tunable structure with both acidic and basic properties. This bi-functionality allows for the use of these materials as catalysts for various organic conversions.

-     Catalyst support: LDHs of various types, with a majority being Mg/Al types, have been reported as support for catalytic species, such as transition metals, alkali metals and even various anions.

A quick inspection of the search results found when queried for “Hydrotalcite AND catalyst” reveals a plethora of applications for a wide variety and often very specific processes. Often, specific types of hydrotalcites are described as best suited for a respective process. Kisuma Chemicals has developed a range of materials with interesting properties. We are greatly interested to start collaborations with partners who want to develop catalytic systems based on (custom) hydrotalcites.

Contact our R&D

For more questions, or to explore common grounds to start a co-operation revolving around hydrotalcites for catalyst applications, contact our R&D department today!  

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Innovation

Kisuma Chemicals researches a myriad of new applications for existing and new productsThe Research and Development department of Kisuma Chemicals is constantly on the look-out for opportunties to develop new applications for our current products and the products we are developing. Today, the majority of the synthetic hydrotalcites and magnesium hydroxides produced in our factory find their way into plastic applications, such as PVC and Polyolefins. However, our materials have properties that are interesting for a much wider range of applications. The is an extremely large amount of scientific publications available, especially involving hydrotalcites and layered double hydroxides in general, describing the advantages of these products in fields where they have not yet found commercial application, including:

We are technically and commercially interested in all developments with our materials. Our R&D strategy is strongly based on cooperation with other industrial and scientific partners. If you have suggestions or ideas for new developments, do not hesitate to contact our R&D department to explore common grounds.

 

 

 

Continuity Through Innovation

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The Netherlands
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