| 摘要 |
Ethylene glycol is prepared from a carbohydrate source in a process, wherein hydrogen, the carbohydrate source, a liquid diluent and a catalyst system are provided as reactants into a reaction zone; wherein the catalyst system comprises a tungsten compound and at least one hydrogenolysis metal selected from the groups 8, 9 or 10 of the Periodic Table of the Elements; wherein the carbohydrate source is reacted with hydrogen in the presence of the catalyst system to yield a product mixture comprising ethylene glycol and one or more alkylene glycols, wherein at least part of the product mixture is converted with a carbonyl group containing compound to form a mixture of dioxolanes; wherein the mixture of dioxolanes are separated to yield at least a fraction comprising the dioxolane formed from ethylene glycol; and wherein at least said fraction is hydrolyzed to yield ethylene glycol. |
