Method of filtering porous particles
First Claim
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1. A method of manufacturing porous polymer particles comprising:
- forming a dispersion of washed porous polymer particles in an external aqueous phase, wherein individual porous particles each comprise a continuous polymer phase and internal pores containing an internal aqueous phase comprising a pore stabilizing hydrocolloid, the external aqueous phase of the dispersion of porous polymer particles has a specific conductivity of less than 100 microSeimens/cm and the ionic strength in the external aqueous phase is lower than the ionic strength in the internal aqueous phase, and the porous polymer particles have a porosity of greater than 10% based on volume of the internal pores as a percentage of the total volume of the particles; and
filtering the dispersion of washed porous polymer particles with a filter to remove the external aqueous phase and isolate the porous polymer particles, wherein the filtering is done while agitating the porous particles.
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Abstract
The present invention is a method of manufacturing porous polymer particles comprising: forming a dispersion of porous polymer particles in an external aqueous phase, wherein individual porous particles each comprise a continuous polymer phase and internal pores containing an internal aqueous phase; and filtering the dispersion of porous polymer particles with a filter to remove the external aqueous phase, wherein the filtering is done while agitating the porous particles.
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19 Claims
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1. A method of manufacturing porous polymer particles comprising:
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forming a dispersion of washed porous polymer particles in an external aqueous phase, wherein individual porous particles each comprise a continuous polymer phase and internal pores containing an internal aqueous phase comprising a pore stabilizing hydrocolloid, the external aqueous phase of the dispersion of porous polymer particles has a specific conductivity of less than 100 microSeimens/cm and the ionic strength in the external aqueous phase is lower than the ionic strength in the internal aqueous phase, and the porous polymer particles have a porosity of greater than 10% based on volume of the internal pores as a percentage of the total volume of the particles; and filtering the dispersion of washed porous polymer particles with a filter to remove the external aqueous phase and isolate the porous polymer particles, wherein the filtering is done while agitating the porous particles. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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