Concentrating evaporators – Processes – Involving waste liquid
Reexamination Certificate
2005-09-20
2005-09-20
Manoharan, Virginia (Department: 1764)
Concentrating evaporators
Processes
Involving waste liquid
C159SDIG001, C203S073000, C203S080000, C216S093000, C423S220000, C423S419100, C558S260000
Reexamination Certificate
active
06946055
ABSTRACT:
An organic solvent is separated from a waste stream containing supercritical CO2, an organic solvent and etchant contaminants. The process includes separating the supercritical CO2by subjecting the waste stream to elevated temperature and/or reduced pressure to thereby obtain a first composition containing the supercritical CO2and a second composition containing the organic solvent and being substantially free of the supercritical CO2; and then removing non-volatile etching contaminants from the second stream search as by at least one of the following:evaporation;distillation;filtration;centrifugation;and settling.
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Bhatt Anilkumar C.
Wagner Jerome J.
Manoharan Virginia
Samodovitz Arthur J.
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