Method for producing microcapsule powder
AssigneeTakeda Pharmaceutical Company Limited
InventorsSeitaro Mizukami, Naoki Choda
Life of this patent
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Abstract
A method for producing a microcapsule powder includes a concentration step. In the concentration step, an aqueous dispersion of a microcapsule is supplied into a cyclone, and the aqueous dispersion is then concentrated. The concentration step includes an aqueous dispersion-supplying step and a concentrated dispersion-recovering step. In the aqueous dispersion-supplying step, the aqueous dispersion is supplied into a cylindrical member inlet. In the concentrated dispersion-recovering step, a microcapsule dispersion is recovered. The microcapsule dispersion is discharged through a conical member outlet.
Claims6
A method for producing a microcapsule powder, comprising a concentration step of supplying an aqueous dispersion of a microcapsule produced by in-water drying into a cyclone and then concentrating the aqueous dispersion to produce a concentrated dispersion, wherein the cyclone comprises:
- a cylindrical member having a cylindrical member inlet and defining a cylindrical space,
- a conical member attached to one end of the cylindrical member, defining a conical space, and having a conical member outlet,
- a tubular member attached to the other end of the cylindrical member and having a tubular member outlet,
- the conical space communicating with the cylindrical space, and
- the tubular member having an interior space that communicates with the cylindrical space;
- and
- wherein the concentration step comprises:
- an aqueous dispersion-supplying step of supplying the aqueous dispersion into the cylindrical member inlet,
- a concentrated dispersion-recovering step of recovering the concentrated dispersion discharged through the conical member outlet, further comprising a dilute dispersion-recovering step of recovering a dilute dispersion having a microcapsule concentration lower than the microcapsule concentration in the concentrated dispersion.
Dependencies are inferred from the claim text.