Lohmann Gmbh & Co Kg

Bernd Blaudszun

Peter Barth

A process for the recovery of solvents is disclosed. A hot carrier gas stream laden with solvent vapors from an evaporation space is compressed, cooled, and expanded with production of work for condensing and separating the solvent. The carrier gas stream lean in solvent vapors is conducted back into the evaporation space after being reheated. The whole of the work arising on expansion is transferred in direct mechanical coupling to one of two or more compression stages for compression of the carrier gas stream laden with solvent vapors. An apparatus for practicing the process is also disclosed.

Process and apparatus for recovery of solvents

A process and an apparatus for the recovery of solvents adsorbed from exhaust air containing solvent vapors by an adsorbent is disclosed. A stream of hot inert gas is made to pass preferably, in an alternating manner through two absorbent charges laden with solvent to achieve desorption. The solvent vapors picked up by the stream of inert gas are condensed and separated. The stream of inert gas, lean in solvent vapors, is used as a desorption medium.

Process and apparatus for the recovery of solvents

A process for drying solvent containing material is disclosed. The solvent containing material is passed through a drying chamber containing an inert gas. Inert gas is introduced into at least one lock chamber preceding and/or following the drying chamber. An annular flow of inert gas is produced in the lock chamber. A minor amount of the inert gas required for drying the material is jetted into the lock chamber proximate to the inlet and/or outlet opening of the drying chamber and a mixture of inert gas and sucked-in external air being discharged from the lock chamber in the peripheral region of the annular flow. The major portion of the inert gas is introduced directly into the drying chamber. An apparatus for practicing the invention is also disclosed.

Growing community of inventors

Steinkirchen, Germany

Bernd Blaudszun