Hydrated alkali metal dichloroisocyanurate and its production
AssigneeOlin Corporation
InventorsDavid F. Doonan, Noel N. Coe
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Abstract
Hydrated alkali metal dichloroisocyanurate particles are prepared in a process which comprises, in a first step, spraying droplets of an aqueous slurry of alkali metal dichloroisocyanurate into an evaporation zone fed with a moving stream of heated gas to evaporate water from the droplets and form dry porous solid spherical particles of hydrated sodium dichloroisocyanurate. In a second step, the dry particles are fluidized in a cooling gas until cooled to a temperature below about 50.degree. C. The resulting porous hydrated particles have a uniform distribution of hydration, are dust-free, and quickly dissolve in water.
Claims26
A process for preparing dry cooled porous particles of hydrated alkali metal dichloroisocyanurate which comprises:
- a. spraying droplets of an aqueous slurry of solid alkali metal dichloroisocyanurate into an evaporation zone fed with a moving stream of gas heated to a temperature sufficiently high to evaporate free water from the droplets and form from said droplets heated porous solid spherical particles of hydrated alkali metal dichloroisocyanurate containing from about 7 to about 14 percent by weight of water of hydration,
- b. fluidizing said heated particles in a cooling fluidizing gas until said particles are cooled to a temperature below about 50.degree. C., and
- c. recovering the resulting dry cooled porous solid spherical particles of hydrated alkali metal dichloroisocyanurate produced thereby.
A process for cooling heated particles of an alkali metal dichloroisocyanurate which comprises:
- a. feeding heated particles of a hydrated alkali metal dichloroisocyanurate containing from about 7 to about 14 percent by weight of water of hydration into a fluidized bed cooler, contacting said hot particles with a cooling fluidizing gas having a temperature in the range from about 15.degree. to about 50.degree. C., and having a relative humidity in the range from about 25 to about 50 percent, and
- b. recovering cooled particles of alkali metal dichloroisocyanurate product from said fluidized bed cooler.
Dependencies are inferred from the claim text.