Preparation of silica particles
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United States of America Patent
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Apr 10, 2018
Issued Date -
N/A
app pub date -
Dec 11, 2013
filing date -
Dec 11, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention provides a cost-efficient method for producing particles having a SiO2 containing surface wherein said method comprises a) providing an aqueous reaction composition comprising i) core particles, ii) an added base, iii) a silicate salt, and iv) a pH modulator wherein the pH value of the reaction composition is above the gelation pH value; b) agitating said reaction composition, wherein the pH modulator decreases the pH value of the reaction composition over time and wherein due to said decrease of the pH value of the reaction composition SiO2 is deposited onto the core particles, whereby particles are formed which have a diameter of 30 μm or less; and c) obtaining the particles. Furthermore, silica particles having high nucleic acid binding properties are provided.
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International Classification(s)
- C01B:NON-METALLIC ELEMENTS; COMPOUNDS THEREOF
- C04B:LIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREO....
- C12N:MICRO-ORGANISMS OR ENZYMES; COMPOSITIONS THEREOF
- C09C:TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBRO....
- C01G:COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLAS....
- B32B:LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA....
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