Method and apparatus for treating objects in a closed vessel with a solvent
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United States of America Patent
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-
Apr 30, 1991
Grant Date -
N/A
app pub date -
Mar 9, 1989
filing date -
Aug 1, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a method, especially for stripping enamel and removing coatings from objects, the advantages of a solvent treatment are to be retained, without having to put up with the disadvantages of contaminating the environment. This is accomplished essentially by using in a closed treating vessel a treating mixture with at least a preponderance of a solvent with a proportion of water in excess of that required for an azeotropic mixture and carrying out the treatment while boiling the treating mixture. After the treating mixture is removed from the vessel, any solvent components still present are distilled off azeotropically from the system with water and removed before the vessel is opened.
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