"freon" Solvent Twd 602 Regeneration System
Original Publication Date: 1986-May-01
Included in the Prior Art Database: 2005-Mar-09
A "Freon" solvent cleaning tank for computer part processing contains a cleaning fluid which is a mixture of Freon solvent, water and surfactant. As the solvent takes on contamination a scum forms on the surface of the fluid. The scum is a water/ contaminant mixture which must be removed and then replaced with fresh water. The standard technique calls for separate settling tanks and overnight settling of the solution. The new technique uses a vacuum system to remove the scum from the cleaning fluid. No settling tanks are required and the entire process can be performed in a matter of minutes.