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Industrial process oils, such as lubricants or rolling-mill oil, become contaminated while being used. The pollutants include soot, metal particles and water and their sizes are often in the micron and sub-micron particle range. One problem is that these pollutants have a density that closely matches the density of the oil and this similarity of densities means it is difficult to separate the contaminants using gravimetric or centrifugal separation techniques.

The products in our OT series are chemical compositions of surface-active molecules that are not themselves soluble in the oils. When combined with the process oils, these chemicals build a cloud of sub-micron droplets with a very high affinity for the pollutants – an affinity that successfully traps and isolates the pollutants within the function chemicals. The sub-micron droplets coalesce with each other, forming larger and larger droplets – droplets that have a higher density than the surrounding oil and therefore separate into a liquid heavy phase. The coalescence of the droplets and the separation into the heavy phase is dramatically speeded up by increasing the gravitational forces, for example with a centrifugal separator.

The particular characteristics of industrial process oils are to a large extent controlled by their viscosity and the presence of additives, the so called additive package. This additive package is adapted to the characteristics of the oil in order to produce the optimum process.

When selecting a suitable OT-product, it is of utmost importance for the additive package to remain intact while it is in the process oil and that there is no residue of the OT product in the cleaned oil. Selecting the appropriate OT product is done after laboratory testing where the oil’s composition (its fingerprint) is studied – with and without the separation additives.

Last Updated on Thursday, 04 November 2010 11:21