Process for the preparation of polyglycerols

摘要

A process for preparation of polyglycerol is provided, comprising the steps of (a) reacting glycerol or diglycerol with hydrogen chloride at between about 340 DEG K. and about 410 DEG K. to yield a mixture that comprises an alpha -monochlorohydrin of glycerol or an alpha -monochlorohydrin of diglycerol, (b) mixing the alpha -monochlorohydrins and an alkali metal glycerolate or an alkali metal diglycerolate at a temperature of between about 320 DEG K. and 410 DEG K. to yield a mixture of alkali metal chloride and glycerol and/or diglycerol and polyglyerol, (c) separating the alkali metal chloride from the glycerols and (d) separating the polyglycerol from glycerol and/or diglycerol.