One vessel process for making 1,2-propanediol from a high fructose feedstock
A process is described for directly converting a high fructose feedstock to a product mixture including one or more lower polyols in which 1,2-propanediol is produced in preference to any other lower polyols, wherein a high fructose feed and a source of hydrogen are supplied to a reaction vessel and reacted in the presence of a copper-containing, supported ruthenium catalyst to provide the product mixture.
1. A process for converting a high fructose feedstock to a product mixture including one or more lower polyols in which 1,2-propanediol is produced in preference to any other lower polyols in a single stage, wherein a high fructose feed and a source of hydrogen are supplied to a reaction vessel and reacted in the presence of a copper-containing, supported ruthenium catalyst to provide the product mixture.
2. The process of claim 1 , wherein the high fructose feed comprises at least 42 percent by weight of fructose.
3. The process of claim 2 , wherein the high fructose feed comprises 53 percent by weight of glucose.
4. The process of claim 1 , wherein the high fructose feed comprises 55 percent by weight of fructose and 42 percent by weight of glucose.
5. The process of claim 1 , wherein the high fructose feed comprises 90 percent by weight of fructose and 10 percent by weight of glucose.
6. The process of claim 1 , wherein the high fructose feed is comprised of the hydrogenolysis product of a fructose-containing biomass.
7. The process of claim 1 , wherein the copper-containing, supported ruthenium catalyst is a copper-containing, sulfided ruthenium catalyst on a support.
8. The process of claim 7 , wherein the support is carbon.
9. The process of any of claims 1 - 8 , conducted as a semi-batch process wherein the high fructose feed is supplied to the reaction vessel at a first concentration and subsequently at one or more later times in the course of a batch at the first or a greater concentration.
10. The process of any of claims 1 - 8 , conducted as a continuous process wherein the high fructose feed is supplied to the reaction vessel at a first concentration and at one or more points along the length of the reaction vessel downstream of the reaction vessel inlet at the first or a greater concentration.