Breaking Emulsions by Jack Jones of Riverstones Biodiesel Questions? Comments? Feedback? Click Here INTRODUCTION EMULSION DEFINED BREAKING AN EMULSION This page provides a pictorial walk-through for creating and breaking a small biodiesel emulsion. We start with clean biodiesel. Since clean biodiesel will not emulsify with water alone we must also add soap to the biodiesel. The soap we add is, ironically enough, provided by biodiesel by-product. With the combination of clean biodiesel, soap (biodiesel by-product), water, and a very aggressive mixing of the liquids we easily create a biodiesel emulsion. With the biodiesel emulsion created we then break the emulsion by adding the solvents (the biodiesel by-product). We add small amounts of the by-product to determine how much is really needed to break our emulsion. It is important not to mix these solvents too aggressively or their emulsion breaking power will be halted by the emulsion creating power of the soap that is present. A thorough mixing is all that is needed. It is also important to have the mixture a little warm at this point. We heated the mixture up to 90F. Start with 500ml of nice clean biodiesel Add 50ml of biodiesel by-product (glycerin, soap, methanol etc.) Notice the layer on the bottom Now notice the layer of water/by-prodcut on the bottom And shake some more until it emulsifies Remember what it looked like before the emulsion? Add 50ml by-product and gently mix That didn't break the emulsion so add another 50ml by-product and gently mix It's starting to work but we need another 50ml by-product and gently mix A total of 150ml by-product broke the emulsion |
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