PROCESSES FOR ISOLATING OR PURIFYING PROPYLENE GLYCOL, ETHYLENE GLYCOL AND PRODUCTS PRODUCED THEREFROM
First Claim
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1. A process for isolating or purifying bio-based propylene glycol, bio-based ethylene glycol or a combination thereof, the process comprising:
- placing the bio-based propylene glycol, the bio-based ethylene glycol or the combination thereof, and a polar solvent in an apparatus;
distilling the bio-based propylene glycol, the bio-based ethylene glycol or the combination thereof, and the polar solvent in the apparatus; and
collecting the bio-based propylene glycol, the bio-based ethylene glycol or the combination thereof.
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Accused Products
Abstract
Processes for separating butanediols from glycols are disclosed, as well as products and compositions resulting therefrom.
45 Citations
21 Claims
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1. A process for isolating or purifying bio-based propylene glycol, bio-based ethylene glycol or a combination thereof, the process comprising:
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placing the bio-based propylene glycol, the bio-based ethylene glycol or the combination thereof, and a polar solvent in an apparatus; distilling the bio-based propylene glycol, the bio-based ethylene glycol or the combination thereof, and the polar solvent in the apparatus; and collecting the bio-based propylene glycol, the bio-based ethylene glycol or the combination thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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- 8. An isolated or purified bio-based propylene glycol, an isolated or purified biobased ethylene glycol, or a combination thereof, having less than 0.2 weight percent of 1,2-butanediol, 2,3-butanediol or a combination thereof.
- 13. An isolated or purified bio-based propylene glycol, having less than 0.2 weight percent of 1,2-butanediol, 2,3-butanediol or a combination thereof.
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17. A system for removing butanediols from bio-based propylene glycol, bio-based ethylene glycol or a combination thereof, comprising:
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a first conduit comprising the bio-based propylene glycol, the bio-based ethylene glycol, or the combination thereof; an apparatus configured for distilling a mixture the bio-based propylene glycol, the bio-based ethylene glycol or the combination thereof, and the butanediols; a second conduit comprising an isolated or purified bio-based propylene glycol, an isolated or purified bio-based ethylene glycol or a combination thereof; and a third conduit comprising the butanediols. - View Dependent Claims (18, 19, 20)
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21-68. -68. (canceled)
Specification