Method and apparatus for the formation of particles
AssigneeUniversity of Bradford
InventorsMazen Hanna, Peter York
Life of this patent
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Abstract
A method for the dewatering of a material layer of paper fibers in a double-screen former, where the sheet weight (oven-dried sheet weight (otro)) is more than 100 g/m.sup.2 and/or the screen circulates with a speed of at least 100 m/min. Two screens are guided at two guide surfaces that, for example, belong to open forming cylinders. In this arrangement forming cylinders of this kind are so dimensioned and positioned that no dewatering elements that contact one of the screens are present between the run-out line of the screens from the first guide surface and the run-in line at the second guide surface.
Claims25
Apparatus for use in the formation of a particulate product, comprising a particle formation vessel;
- means for controlling the temperature in said vessel;
- means for controlling the pressure in said vessel;
- and means for the co-introduction, into said vessel, of a supercritical fluid and a vehicle containing at least one substance in solution or suspension, such that dispersion and extraction of the vehicle may occur substantially simultaneously by the action of the supercritical fluid.
Method for the formation of a particulate product which comprises the co-introduction of a supercritical fluid and a vehicle containing at least one substance in solution or suspension into a particle formation vessel, the temperature and pressure in which are controlled, such that dispersion and extraction of the vehicle occur substantially simultaneously by the action of the supercritical fluid.
Dependencies are inferred from the claim text.