Apparatus for recovering high-boiling point solvents

An apparatus for recovering a high-boiling point solvent comprising:

• a rotor comprising, a honeycomb structure having an adsorbent supported thereon, a rotational axis, tubular air passageways extending therethrough parallel to the rotational axis and first and second end faces;
• drive means for driving the rotor;
• a separator comprising radially arranged plate members provided in a face-to-face relationship with the first and second end faces of the rotor for partitioning the neighborhood of each of the rotor end faces into a adsorption zone, a desorption zone and a purge zone;
• fan means for supplying air containing a high-boiling point solvent boiling at 150.degree. to 300.degree. C. to the first end face of the absorption zone, for releasing a part of a clean gas effluent from the second end face of the rotor to an air atmosphere, and for supplying a remainder of the clean gas is supplied into the purge zone subsequent to the adsorption zone in the direction of the rotation of the rotor;
• heating means for heating the remainder of the clean gas fed from the purge zone;
• cooling means for separating the solvent enriched gas effluent from the desorption zone of the rotor into a liquefied product to be recovered and a cooled lean gas;
• and
• return means for mixing the cooled lean gas with the high-boiling point solvent containing air.

A method for recovering a high-boiling point solvent comprising the steps of:

• supplying air containing a high-boiling point solvent boiling at 150.degree. to 300.degree. C. to a first end face of a Absorption zone of a rotor;
• releasing a part of a clean gas effluent from a second end face of the rotor to an air atmosphere;
• supplying a remainder of the clean gas is supplied into a desorption zone subsequent to a adsorption zone in a direction of a rotation of the rotor;
• heating the remainder of the clean gas;
• separating the solvent enriched gas effluent from the desorption zone of the rotor into a liquefied product to be recovered and a cooled lean gas;
• and
• mixing the cooled lean gas with the high-boiling point solvent containing air.

A method for recovering a high-boiling point solvent comprising the steps of:

• supplying air containing a high-boiling point solvent boiling at 150.degree. to 300.degree. C. to a first end face of an absorption zone of a rotor;
• releasing a part of a clean gas effluent from a second end face of the rotor to an air atmosphere;
• supplying a remainder of the clean gas is supplied into a purge zone of the rotor subsequent to the adsorption zone in a direction of the rotation of the rotor;
• heating the remainder of the clean gas fed from the purge zone;
• separating the solvent enriched gas effluent from a desorption zone of the rotor into a liquefied product to be recovered and a cooled lean gas;
• and
• mixing the cooled lean gas with the high-boiling point solvent containing air.