Glycerin (glycerol) is a colorless, odorless, sweet organic substance with a clear, viscous liquid appearance under normal conditions. However, under the following circumstances, the smell, color and taste of glycerol will change. Here is a brief introduction to let you know:
Most odor and color problems can be avoided as long as high-quality raw materials are used, crude glycerol is properly stored, and long-term high temperature is avoided. Impurities in crude glycerol, especially non-glycerol organics (MONG), will affect the quality and output of distilled glycerol. If the content of non-glycerol organic matter is very high (3% - 5%), the finished product will have odor, taste and color problems. The presence of trimethylene glycol in non-glycerol organic matter will affect the color of glycerol and cause problems in storage.
Impurities with close boiling points and most odor substances can be removed by a deodorizer or degassing device, which is installed after the distillation column and operated with direct steam (or "jet" steam) under high vacuum. The remaining pigment substances are removed by adsorption of activated carbon.
There are iron ions and iron salts. In the presence of acid or neutral salt, acrolein will be produced. The smell of acrolein is very special. People can smell it when the content is very low.
The glycerol remaining in various processing equipment (especially in carbon adsorption column) will be prepared and produce odor substances that are difficult to remove. Therefore, the process equipment shall be cleaned after shutdown, and the carbon adsorption column shall be dried with air and washed with water. Fresh activated carbon sometimes contains impurities that produce odor. These carbons can be washed with distilled glycerin, which can be recycled through rearrangement or sold as low-grade products.
In addition, glycerin is harmless to the skin. Its function is to absorb water and moisturize. It will not cause damage to the skin in terms of composition or efficacy, and will not have side effects even if it is used for a long time. Just pay attention to the use method and precautions of glycerin. If it is not used properly, it may dry the skin. As long as it is used reasonably, it can be used safely! You can come to our website http://www.mybuildingdesignz.com Consult more related matters!