| abstract |
The present invention includes a step of applying a catalyst salt having catalytic activity for a etherification reaction of a polyol selected from the group of glycerin and oligoglycerin on a carrier, and a catalyst salt on the carrier from the group of glycerin and oligoglycerin. The present invention relates to a method for preparing polyglycerin comprising: contacting with a fluid phase containing a selected polyol; and subjecting the polyol in the fluid phase to an etherification reaction in the presence of a catalyst salt, thereby obtaining polyglycerin. [Selection] Figure 3A |