![]() When the water is distilled out of the reaction at elevated temperatures considerable amounts of chlorohydrin glycerides, resinous polymers, and similar high boiling and undesirable residues are produced. If the water of reaction be allowed to accumulate in the process, there is obtained on fractional distillation of the product a substantial fraction composed of water, hydrogen chloride, acetic acid, and glycerol dichlorohydrin, from which the desired dichlorohydrin product is very difficult of recovery. While it is old to react glycerol with hydrogen chloride in the presence of a suitable catalyst such as acetic acid to form glycerol dichlorohydrin and two molecules of water, the known processes either allow the water of reaction to accumulate, favoring equilibrium conditions long before complete reaction can be obtained, or drive the water out of the reaction mixture by conducting the reaction at elevated temperatures, i. This invention concerns the use of organic solvents in the preparation of glycerol dichlorohydrin (alpha).
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