go here Artisan has developed unique thermal separation processes using our thin-film technology for the pre– and post–reaction steps in the biodiesel manufacturing process. Artisan’s thin-film technology is ideally suited to purify biodiesel from its chemical by-products downstream of the esterification and/or transesterification reactions. Using Artisan’s biodiesel purification process eliminates the need for a separate glycerin purification process.
go here Most biodiesel processes require less than 1% free fatty acid (FFA) in the feedstock. The price of these feed materials, generally, vegetable oils, has skyrocketed with increasing demand. Using our Rototherm® technology, Artisan developed an economical one–step process that yields a material with only 1% FFA from inexpensive low–grade feedstocks containing up to 25% FFA with no need for additives. The process also produces high quality fatty acids that can be sold or further esterified to produce biodiesel.
http://ninacrews.com/2017/11/trailer-seeing-tomorrow/ For every nine pounds of biodiesel produced in any reaction, one pound of glycerin is also produced. The crude glycerin contains inorganic salts, heavies, solvent and water and is considered a hazardous waste as generated from most biodiesel processes. Artisan has developed a cost effective process to purify the glycerin from crude to fuel grade, tech grade, or USP grade, depending on the quality of the feedstock used in the process.