Process for preparing ethylene glycol from a carbohydrate
First Claim
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1. Process for preparing ethylene glycol from a carbohydrate source,wherein hydrogen, the carbohydrate source, a liquid diluent and a catalyst system are introduced 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 diluent that is introduced into the reaction zone comprises an alkylene glycol; and
wherein the carbohydrate source is reacted with hydrogen in the presence of the catalyst system to yield an ethylene glycol-containing product.
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Abstract
Ethylene glycol is prepared from a carbohydrate source in a process,
- wherein hydrogen, the carbohydrate source, a liquid diluent and a catalyst system are introduced 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 diluent that is introduced into the reaction zone comprises an alkylene glycol; and
- wherein the carbohydrate source is reacted with hydrogen in the presence of the catalyst system to yield an ethylene glycol-containing product.
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25 Claims
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1. Process for preparing ethylene glycol from a carbohydrate source,
wherein hydrogen, the carbohydrate source, a liquid diluent and a catalyst system are introduced 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 diluent that is introduced into the reaction zone comprises an alkylene glycol; and wherein the carbohydrate source is reacted with hydrogen in the presence of the catalyst system to yield an ethylene glycol-containing product. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. Continuous process comprising a first step starting the continuous process,
wherein the first step comprises a process for preparing ethylene glycol from a carbohydrate source, wherein hydrogen, the carbohydrate source, a liquid diluent and a catalyst system are introduced 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 diluent that is introduced into the reaction zone comprises an alkylene glycol; and
wherein the carbohydrate source is reacted in a reaction with hydrogen in the presence of the catalyst system to yield an ethylene glycol-containing product; andwherein the reaction is started with a mixture of carbohydrate, diluent, catalyst system and hydrogen, wherein the diluent comprises an alkylene glycol.
- 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;
Specification