Preparation of glycerol from propane
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- The most important process is the epichlorohydrin process, which involves chlorinating propylene to produce allyl chloride, which is then oxidized with hypochlorite to produce dichlorohydrins, which react with a strong base to produce epichlorohydrin. After that, the epichlorohydrin is hydrolyzed to produce glycerol.
- The progil process converts propene to propene oxide, which is then isomerized to allyl alcohol. A second epoxidation with peracetic acid is performed, and the resulting glycidol is hydrolyzed to glycerol.
- Glycerol can be manufactured using a variety of processes and feedstocks. It can be obtained, for example, through propylene synthesis via various pathways, hydrolysis of oil, or transesterification of fatty acids/oils.
- Gravity separation or centrifugation are the most common methods for removing glycerol. This method yields crude glycerol, which may still contain ppm levels of impurities such as methanol, oil, soap, salt, and other organic materials.
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