Method for producing sphere-based crystals
First Claim
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1. :
- A process for the production of homogeneously packed opal-like or inverse opal-like sphere-based crystals comprising;
(a) adding a sufficient amount of a suspension of monospheres having a particle size of 20 nanometers to 30 microns to a flat moving bed porous filtration membrane so as to form a layer thickness on the flat moving bed of 50 microns to 5 mm;
(b) moving the monospheres on the moving bed filtration membrane substantially horizontally over a vacuum filtration zone, and applying a sufficient substantially constant vacuum filtration pressure to the monospheres to obtain crystalline homogeneously packed monospheres;
(c) processing the packed monospheres for stabilization, said processing comprising heating and/or chemically bonding the crystalline packed monospheres.
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Abstract
A moving bed filtration process for the production of sphere based crystals is disclosed. Sphere based crystals having an opal-like structure or an inverse opal-like structure can be produced in accordance with the invention.
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Citations
21 Claims
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1. :
- A process for the production of homogeneously packed opal-like or inverse opal-like sphere-based crystals comprising;
(a) adding a sufficient amount of a suspension of monospheres having a particle size of 20 nanometers to 30 microns to a flat moving bed porous filtration membrane so as to form a layer thickness on the flat moving bed of 50 microns to 5 mm;
(b) moving the monospheres on the moving bed filtration membrane substantially horizontally over a vacuum filtration zone, and applying a sufficient substantially constant vacuum filtration pressure to the monospheres to obtain crystalline homogeneously packed monospheres;
(c) processing the packed monospheres for stabilization, said processing comprising heating and/or chemically bonding the crystalline packed monospheres. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
- A process for the production of homogeneously packed opal-like or inverse opal-like sphere-based crystals comprising;
Specification