Process for the production of polyglycerines

Details Process for the production of polyglycerines Process for the production of polyglycerines

C - Chemistry, Metallurgy

07

C

260/632.2

C07C 41/03 (2006.01) C07C 41/26 (2006.01) C07C 41/42 (2006.01) C07C 43/13 (2006.01)

Patent

CA 1304757

ABSTRACT OF THE DISCLOSURE: A method for producing polyglycerols low in cyclic components comprises reacting glycerol with chlorohydrins at an elevated temperature. The polyglycerols thus produced are obtained in good yield with only small amounts of undesireable cyclic compounds. Furthermore, isolation of intermediates and end-product reprocessing is unnecessary using this process which, more particularly, comprises reacting glycerol or diglycerol or a higher polyglycerol with epichlorohydrin (instead of the conventional chlorohydrin) at specific temperatures and specific molar ratios of glycerol or diglycerol or higher polyglycerol to the epichlorohydrin. An alkaline reacting (preferably aqueous) solution is added to the unseparated reaction mixture thus obtained at a temperature of 50 to 120°C, the quantity depending on the amount of organically bound chlorine contained in the reaction mixture. After the addition of water, the reaction-mixture is desalinated by one or more cation- and subsequent anion-exchangers, is then dehydrated by distillation and finally the glycerol- polyglycerol mixture is separated, by fractional distillation, into glycerol, diglycerol and higher polyglycerols.

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