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The global increase in biodiesel production has led to a marked increase in world glycerin production. Glycerin is produced as an approximately 11 percent byproduct in the transesterification of triglycerides, which are the predominant feedstock material for producing biodiesel. Glycerin remains one of the most versatile and valuable known chemicals and has a wide variety…
Crude glycerin from storage is first heated to 194 degrees Fahrenheit on a plate heat exchanger, using energy recovered from the purified glycerin stream, plus live steam. After a safety filtration to protect the downstream processing steps from fouling by suspended materials, the hot and clean crude glycerin is carefully degassed before entering a chromatographic…
The ion exchange system uses cation, anion, and mixed bed exchangers to remove catalyst and other impurities. The removal of ionic substances by ion exclusion chromatography is the concentration step. Due to their charge, the ionic substances are repelled from the resin surface which stays in the liquid volume. The non-ionic substances are accommodated in…