Chemistry of inorganic compounds – Boron or compound thereof – Oxygen containing
Patent
1982-03-15
1983-11-01
Carter, Herbert T.
Chemistry of inorganic compounds
Boron or compound thereof
Oxygen containing
252378R, 252135, 34 57R, C01B 3512
Patent
active
044129785
ABSTRACT:
A method and apparatus for producing a puffed borax product having superior particle strength and improved uniformity of hydration and puff ratio. In the method particles of borax having a given particle size distribution are introduced into a downwardly flowing slowly moving laminar air stream in a vertical tower, as a horizontally dispersed sheet of particles. The air stream is heated sufficiently to remove part of the water of hydration without fusing the borax. The borax particles, carried by the air stream, are gravitationally separated downstream, and are found to have a more uniform puffing ratio, i.e. feed particles of different sizes are puffed more proportionally than in prior art processes.
An apparatus for carrying out this method is also disclosed, which comprises a vertical tower with an input for heated air and an opening in the wall of the tower through which the borax feed is introduced as a dispersed sheet. The borax feed is introduced by one or more rotating horizontal wheels having vanes which disperse the particles through the opening into the moving air stream as a sheet of particles, which are carried along by the air stream and are separated gravitationally downstream from the point of entry.
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patent: 3986987 (1976-10-01), D'Souza
patent: 4031354 (1977-06-01), D'Souza
Rhees, "Puffed Borax", Soap and Chemical Specialties, Jan. 1966, pp. 59-61 and 118-120.
Carter Herbert T.
Leeds Jackson
Stokely-Van Camp Inc.
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