Mineral oils: processes and products – Refining – Halogen contaminant removal
Patent
1988-04-20
1991-05-14
Caldarola, Glenn
Mineral oils: processes and products
Refining
Halogen contaminant removal
2082625, 55 16, 55 46, 55 61, B01D 5304, B01D 5312
Patent
active
050153650
ABSTRACT:
A process for removing halogenated hydrocarbons and other solvents from a solvent laden air (SLA) stream, includes the step of passing the SLA from an SLA intake through at least three adsorbers each containing an activated carbon bed. At least one adsorber undergoes regeneration while at least two other adsorbers operate in series in the adsorption mode. Regeneration is accomplished by passing a regenerating fluid such as steam through the bed. The steam and solvent vapor is condensed to form a liquid having at least one solvent rich fraction and at least one solvent poor fraction. This condensation product undergoes one or more separation steps to remove the solvent rich fractions from the solvent poor fractions. Non-condensibles are returned to the SLA intake. The SLA is pre-conditioned prior to the SLA inlet to remove extraneous contaminants and to control inlet conditions of temperature, relative humidity and flow rate. Removal efficiencies of 99 percent and above are attainable by the process.
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Mestemaker Jerry L.
Thakker B. R.
Vara Tomas E.
Caldarola Glenn
Vara International Inc.
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