Ethylene Glycol → Propylene Glycol

HRID 2407640Notes

Reaction equation

HRID 2407640 reaction equation
[OH:1][CH2:2][CH:3]([CH2:5]O)[OH:4].[H][H].C(O)CO>O.[Pt]>[CH2:2]([OH:1])[CH:3]([OH:4])[CH3:5].[CH3:5][C:3]([CH2:2][OH:1])=[O:4]

Participants

7

Reactant 3

HCID 174Ethylene GlycolHCID 753Glycerol2×HCID 178418361HCID 178418361, compound

Product 2

HCID 1030Propylene GlycolHCID 8299Hydroxyacetone

Reagents, catalysts & solvents 2

HCID 23939PlatinumCatalystHCID 962WaterSolvent

Procedure

20 wt % glycerol was hydrogenated at 500 psi hydrogen pressure at 220° C. using 80 g of water as solvent. 0.01 g/ml catalyst of 3% Pt/C catalyzed the reaction in 5 h to give glycerol conversion of 32% with 91% selectivity to 1,2-propylene glycol, 2% to acetol and 7% ethylene glycol and <0.01% other products.

Workup

  1. customthe reaction in 5 h

Sources & evidence

ORD record
ord-f8888e7cbc46463087b9064cdedd9dca
Source dataset
uspto-grants-2014_08
Patent number
US08809593B2

Reaction notes

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