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AssigneesClariant International Ltd., Universiteit Utrecht Holding B.V.
InventorsAnton Kaiser, Bert Marc Weckhuysen, Dirk Leinweber, Fiona Kirby, Franz Xaver Scherl, Hans Joachim Metz, Pieter Cornelis Antonius Bruijnincx
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The invention relates to a method for preparing polyglycerol, comprising —providing a catalyst salt on a support, the catalyst salt having catalytic activity with respect to an etherification reaction of a polyol selected from the group of glycerol and oligoglycerols, —contacting the catalyst salt on the support with a fluid phase comprising a polyol selected from the group of glycerol and oligoglycerols, —and subjecting the polyol in the fluid phase to an etherification reaction in the presence of the catalyst salt, thereby forming the polyglycerol.
Method for preparing polyglycerol, comprising
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Method according to any of the preceding claims, wherein the support is a carbon nanofiber.
Method according to any of the preceding claims, wherein the support is activated carbon.
Method according to any of the preceding claims, wherein the catalyst salt is a salt selected from the group of alkaline earth metal salts and alkali metal salts, preferably an alkaline earth metal salt, in particular an alkaline earth metal salt selected from the group of calcium oxide, magnesium oxide, barium oxide, strontium oxide, calcium hydroxide, calcium carbonate, magnesium hydroxide, barium hydroxide and strontium hydroxide, more preferably from the group of calcium oxide, magnesium oxide, calcium hydroxide, calcium carbonate and magnesium hydroxide, and even more preferably calcium oxide.
Method according to any of the preceding claims, wherein the support comprises 1-15 wt. % catalyst salt, in particular 2-10 wt. % catalyst salt, based on the total weight of the catalyst salt and support.
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Polyglycerol mixture, in particular a mixture obtainable by a method according to the invention, having a hydroxyl value in the range of 846-1072 mg KOH/g, as determined by DIN 53240;
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Catalyst salt on a support, the catalyst salt having catalytic activity with respect to an etherification reaction of a polyol selected from the group of glycerol and oligoglycerols, wherein the salt is a calcium salt and the support is a carbon support material, which carbon support material is selected from the group consisting of carbon nanofibers and activated carbon.
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Dependencies are inferred from the claim text.