Crude & Refined Glycerine

Refining purifies crude glycerine to a USP or BS high purity product. Crude glycerine is delivered to the crude still, evaporated, contacted with stripping steam throughout the column and is recovered in the packed column section. The deodorizer further purifies the glycerine by removing unacceptable volatiles. The purified product is cooled and passes through activated carbon beds, then through a polishing filter and cooler. For purification of the crude still residue, a foots still is low maintenance and economical. For large installations, scraped surface recovery systems can be installed, providing a very high, total system recovery.

Natural crude glycerine can come from many sources, including fat splitting (hydrolysis of fat), saponification (adding caustic soda to fat as part of the neutralization process), and transesterification (adding alcohol to fat).

Alternatively, there are also methods of making synthetic glycerine starting from propylene, although Crown does not offer these processes at this time.

Features of our Glycerine Refining System include: 

• Crude still design assures intimate steam/glycerine contact throughout vessel.
• Unique deodorizer ensures stripping of volatiles, produces a higher yield and superior concentration of purified product. 
• Acid conditioning of residue avoids polymerization and glycerine degradation when exposed to high stripping temperatures.