Vacuum drying method
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United States of America Patent
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Aug 3, 1993
Issued Date -
N/A
app pub date -
Sep 26, 1991
filing date -
Apr 27, 1987
priority date (Note) -
Expired
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Abstract
A vacuum drying method and wherein a feed liquid is sprayed into a solvent vapor before being introduced into a vacuum chamber for vacuum evaporation, whereby a powder having spherical particles is produced. Moreover, the amount of solvent remaining in the powder obtained is small.
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