glycerin(Glycerol) is a colorless, odorless, sweet-tasting organic substance that appears as a clear, viscous liquid under normal circumstances. However, under the following circumstances, the smell, color and taste of glycerin will change. Let’s take a look at it below:
As long as you use high-quality raw materials and store crude glycerin properly, you can avoid long-term high temperatures and most odor and color problems. All can be avoided. Impurities in crude glycerin, especially non-glycerol organic matter (MONG), can affect the quality and yield of distilled glycerol. If the content of non-glycerin organic matter is very high (3%-5%), the finished product will have odor, taste and color change problems. The presence of trimethylene glycol in non-glycerol organic matter can affect the color of glycerol and cause storage problems.
The boiling point is close The impurities and most odorous substances can be removed using a deodorizing tower or degassing device, which is installed after the distillation column and operates with direct steam (or: “spray” steam) under high vacuum. The remaining pigment substances are removed by activated carbon adsorption.
In Iron ions, iron salts. Acrolein is produced in the presence of acids or neutral salts. The smell of acrolein is unique and can be smelled by the human nose at very low levels.
remains in Glycerol in various processing equipment (especially in carbon adsorption columns) can be prepared and produce odorous substances that are difficult to remove. Therefore, the process equipment must be thoroughly cleaned after shutdown, and the carbon adsorption column must be dried with air and washed with water. Fresh activated carbon sometimes also contains odor-causing impurities. These chars can be washed with distilled glycerol, which can be recycled through reforming or sold as a low-grade product. </span
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