Preparation of Derivative of Polyhydric Alcohols
First Claim
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1. A system for treating glycerol or sorbitol comprising:
- a reactor operably configured to convert the glycerol or the sorbitol to a reaction product comprising propylene glycol and a butanediol selected from the group consisting of 1,2-butanediol, 1,3-butanediol, 1,4-butanediol, 2,3-butanediol, and combinations of any thereof;
a first conduit comprising the glycerol or the sorbitol operably connected to the reactor;
a product purifier operably configured to remove the butanediol from the reaction product; and
a second conduit comprising the reaction product operably connected to the reactor and the product purifier.
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Abstract
A method for converting a polyhydric alcohol into propylene glycol and butanediols is disclosed. Also disclosed are methods for converting polyhydric alcohols into three-carbon products and four-carbon products. Also disclosed are methods for maximizing conversion of polyhydric alcohols and minimizing formation of reaction products that are difficult to remove from the desired product. In other embodiments, methods are described to optimize use of reactants, including hydrogen, in hydrogenolysis of polyhydric alcohols.
12 Citations
41 Claims
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1. A system for treating glycerol or sorbitol comprising:
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a reactor operably configured to convert the glycerol or the sorbitol to a reaction product comprising propylene glycol and a butanediol selected from the group consisting of 1,2-butanediol, 1,3-butanediol, 1,4-butanediol, 2,3-butanediol, and combinations of any thereof; a first conduit comprising the glycerol or the sorbitol operably connected to the reactor; a product purifier operably configured to remove the butanediol from the reaction product; and a second conduit comprising the reaction product operably connected to the reactor and the product purifier. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8-9. -9. (canceled)
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10. A process for converting a polyhydric alcohol into a three-carbon compound, a four-carbon compound or a combination thereof, the process comprising:
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combining the polyhydric alcohol with hydrogen, thus forming a reaction mixture; heating the reaction mixture; placing the reaction mixture in contact with a catalyst, thus forming a reaction product; acidifying the reaction product; and removing the three-carbon compound, the four-carbon compound, or any combination thereof from the acidified reaction product. - View Dependent Claims (11, 12, 17, 18, 19, 20, 22, 24, 32, 34)
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13-16. -16. (canceled)
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21. (canceled)
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23. (canceled)
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25-31. -31. (canceled)
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33. (canceled)
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35-38. -38. (canceled)
- 39. A composition comprising a bio-based propylene glycol having a measurable content of butanediol, wherein the content of butanediol is less than 0.25%.
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41-45. -45. (canceled)
Specification