Drycleaning assembly and method for removing impurities and residual moisture from an organic drycleaning solvent
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United States of America Patent
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Mar 18, 1980
Grant Date -
N/A
app pub date -
Dec 21, 1977
filing date -
Dec 21, 1977
priority date (Note) -
Expired
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Abstract
Residual moisture and sulfur and other residual reducing agent impurities contained in drycleaning solvents are removed by adding to the solvents an unsubstituted aromatic hydrocarbon or a halogen or alkyl substituted aromatic hydrocarbon and circulating the hydrocarbon-containing solvent through a filter system comprising two filters; one filter containing a solid acid and the other containing chromate compound.
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