Phenothiazine in prill form and method for making the same
AssigneeAvecia Limited
InventorDavid A. Vanzin
Life of this patent
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Abstract
Phenothiazine and its derivatives products are provided with a minimal level of fines or dust as a result of forming such products in prill form. The prills are generally spherical. Also provided is a method for reducing the level of powder in phenothiazine product which includes forming the phenothiazine product in prill form such that the prills have a generally spherical shape. The prill product achieves improved handling, flowability and dissolution times, while minimizing the generation of phenothiazine fines and dust, and the problems associated with worker exposure, irritation and sensitization to such fines and dust.
Claims20
A solid phenothiazine product, comprising a plurality of phenothiazine prills, wherein the prills are generally spherical.
A method of reducing the level of powder in phenothiazine product, comprising forming the phenothiazine product in prill form such that the prills have a generally spherical shape.
A solid phenothiazine product, comprising a plurality of phenothiazine prills, wherein the prills are generally spherical and the product has no greater than about 6% by weight powder.
A method for making phenothiazine in prill form, comprising:
- (a) introducing molten phenothiazine into at least one nozzle having a plurality of holes to form molten phenothiazine droplets;
- and
- (b) cooling the droplets to form solid phenothiazine prills.
A method for making phenothiazine in generally spherical prill form comprising:
- (a) introducing molten phenothiazine into a nozzle which has a plurality of holes to form molten phenothiazine droplets;
- and
- (b) cooling the droplets to form solid phenothiazine prills.
A method for reducing the amount of powder in a phenothiazine product comprising,
- (a) introducing molten phenothiazine into a nozzle having a plurality of holes to form molten phenothiazine droplets, and
- (b) cooling the droplets to form solid generally spherical phenothiazine prills.
Dependencies are inferred from the claim text.