Appeal No. 1997-1461
Application 08/388,915
emulsion carrier is identified as either an organic solvent or
water. Ritzer indicates that when the solvent for the binder
is water, it is used in large amounts and serves as a carrier
for the binder and as a heat transfer fluid to quench the heat
of reaction.
Kotval is directed to a process for the production of
silicon materials with reduced aluminum impurity levels,
useful for solar panel applications. In order to reduce the
impurities in silicon materials, Kotval teaches that it is
known to treat silicon materials with silicon tetrachloride to
reduce the aluminum content (see column 2, lines 40-45).
Whereas Chadwick seeks to convert the high boiling
component to monosilanes, appellant seeks to recover the
silicon particulate from the high boiling component by (A)
initially separating the liquid and particulate components;
(B) washing the particulate component with a solvent having a
boiling point lower than the sublimation temperature of the
metal salt to separate the high-boiling silicon containing
compound(s); and then (C) spray drying the particulate
component (our emphasis).
In order to establish a prima face case of obviousness,
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