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Oxide products formed from calcined carbonate powder for use as biocide, chemical detoxifier and catalyst support products.

A technology of biocides and compositions, applied in the directions of biocides, chemical instruments and methods, botanical equipment and methods, etc.

Active Publication Date: 2016-08-24
CALIX PTY LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These costs have prevented nanomaterials from having a significant impact in the pesticide market

Method used

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  • Oxide products formed from calcined carbonate powder for use as biocide, chemical detoxifier and catalyst support products.

Examples

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Embodiment Construction

[0061] Preferred embodiments of the invention will now be described with reference to the drawings and non-limiting examples.

[0062] An example of a manufactured product can be obtained by considering figure 1 Description of treatment procedures in cases where magnesium hydroxide is a probiotic or biocide.

[0063] In this example, the first step is where the carbonate mineral is magnesite, essentially magnesium carbonate, which is crushed and ground to a particle size distribution close to that in the final product. This could be the cutoff of the classifier being set, and the residence time in the mill being set. Typically, the abrasive material will have a lower particle size of about 1 micron, and a particle size of about 100 microns, with an average particle size in the range of 10-20 microns. If necessary, mineral impurities such as sand, talc and magnetic particles are extracted during the process. The exact distribution depends on the mineral source, whether micro...

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Abstract

A process and apparatus for manufacture of oxide products for use as biocide, chemical detoxifying, and catalytic support products, from caustic calcined carbonate powder, preferably from magnesite, dolomite, or hydromagnesite, is described. These oxide particles are characterised by high surface area, high porosity and a high degree of calcination, and the method of manufacture of utilises an indirectly heated counterflow reactor. The oxides may be used as a powder, granules, or formulated into a slurry and used as a spray, emulsion, foam or fog, or the powder product may be directly applied. Also described is the formation of particles with microstructures defined by at least one nano-crystalline structure positioned on the outer surface of the particles.

Description

technical field [0001] The present invention broadly relates to a method and apparatus for producing calcined powder from light calcined material for the preparation of biologically active materials. Wherein said biological activity is applicable to broad-spectrum virus, bacteria, fungal activity, and according to the target as probiotic or biocide. Background technique [0002] Nanomaterials with biocidal and probiotic properties have been extensively developed, in particular, nanosized magnesium oxide MgO and nanosized zinc oxide ZnO. An example of a biocide is "Antimicrobial Properties of Magnesium Oxide Powder", J. Sawei et al., World Microbiology and Biotechnology, 16, No. 2, pp. 187-194, 2000. Another example is "Antibacterial activity of magnesium oxide nanoparticle powders against food-borne pathogens", J. Nanopart. Res, 13, 6877-6885. [0003] In the study by Sawai et al., the goal was to generate MgO with a high surface area and a particle size of less than 50 nm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/06A01N25/12B01J6/00B82B3/00B82Y40/00
CPCB82Y40/00A01N59/06Y02A50/30A01N25/04A01N25/12B01J21/10B01J35/026B01J35/1019C01F5/06C01P2004/61C01P2006/12C04B2/102C04B2/106
Inventor 马克·西茨
Owner CALIX PTY LTD
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