Extending Chemistry Life with Microfiltration and Ultrafiltration

The cost of acquiring and disposing of cleaning chemistry is usually a major contributor to the overall cost of an industrial or precision cleaning process.  Removing contaminants from cleaning solutions can potentially extend their useful life and reduce overall cleaning costs.  Traditional filters including those of the bag and cartridge variety are commonly used to remove solid (particulate) contaminants …

Lab Testing – Chemical Life

A previous blog discussed the ramifications of contaminant loading on cleaning.  This time let’s look at the long term effects on cleaning chemistry.  In lab testing, the ability of chemistry to withstand extended use is often not challenged.  Chemistry is prepared and used for short term cleaning trials to verify the cleaning process.  In long …

Cleaning Process Specification Questions

The cleaning process is the “recipe” for cleaning.  Like any culinary recipe, it should clearly define the ingredients, times, temperatures and the method of application to be used for cleaning.  Most cleaning consists of at least the three basic steps of washing, rinsing and drying. Wash – The purpose of washing is to remove contaminants …

How do you measure surface tension?

In the world of industrial cleaning technology we talk about surface tension a lot! So much so, in fact, that it is hard to enter into any discussion of cleaning without having the subject of surface tension arise.  In cleaning chemistry, for example, we are always looking for lower surface tension to promote penetration of small surface features …

Surface Tension and/or Wettability

A few days ago, I sat down to write what I thought would be a simple explanation of surface tension and how it is measured in the laboratory (a blog which will be published shortly if I can figure all of this out).  In doing the normal background research, however, I started to see contradictions …

Is it Viscosity or is it Surface Tension??

Viscosity and surface tension are properties that are often intuitively linked to one another.  Because these properties are of primary importance in cleaning it will be worth the while to understand them a bit better. Surface tension is the property of a liquid that exists at the interface of the liquid with another media (usually …

Chemical Concentration – Economic and Process Considerations (cont.)

My previous blog addressed the chemical cost of using too much (or perhaps too little) “soap” in a cleaning process based on chemical cost.  Today we look at process issues. You might be saying, “What the heck?  So I use too much chemical.  Soap is cheap and I look at it as “insurance”.”  Well, that “insurance” …

Chemical Concentration – Economic and Process Considerations

I have talked before on the blog about the subject of chemical concentration and its relationship to cleaning.  A couple of recent incidents prompt me to re-address the subject of chemical concentration but from a little different angle. It’s a “no-brainer” that cleaning chemicals are expensive and, with the possible exception of heat and labor, …

Other Oil Removal Options

In some cases, previously described oil removal technologies based on the gravity separation of oil from the cleaning solution are unjustifiably cumbersome and expensive.  Fortunately, smaller scale solutions are available for use in such applications. Oil Skimmers – Oil skimmers utilize a material which preferentially attracts oil (hydrophobic) to skim floating oil from a surface …