Ethanol → Diethyl Carbonate

HRID 2168860Notes

Reaction equation

HRID 2168860 reaction equation
[C:1](=[O:4])([OH:3])[OH:2].[CH2:5]([OH:11])[CH2:6][CH2:7][CH:8]([OH:10])[CH3:9].[CH2:12](O)[CH3:13]>>[C:1](=[O:3])([O:2][CH2:12][CH3:13])[O:4][CH2:5][CH3:6].[C:1](=[O:2])([OH:4])[OH:3].[CH2:5]([OH:11])[CH2:6][CH2:7][CH:8]([OH:10])[CH3:9]

Participants

4

Reactant 2

HCID 702EthanolHCID 867022981,4-Pentanediol carbonate

Product 2

HCID 7766Diethyl CarbonateHCID 867022981,4-Pentanediol carbonate

Procedure

Adding 1,4-pentanediol carbonate and ethanol in a tubular ester exchange reactor; then adding the prepared metal-rare earth oxide composite catalyst, uniformly mixing and performing an ester exchange reaction, then distilling the reaction product to obtain diethyl carbonate, wherein the mole ratio of 1,4-pentanediol carbonate to ethanol is 1:10, and the weight ratio of the metal-rare earth oxide composite catalyst to the total weight of 1,4-pentanediol carbonate and ethanol is 1:100; the ester exchange reaction is performed at a temperature of 180° C. and under an absolute pressure of 2 MPa for 10 minutes; in the ester exchange reaction, the conversion rate of 1,4-pentanediol carbonate is 100%, and yield of diethyl carbonate is 95%.

Workup

  1. additionuniformly mixing
  2. distillationdistilling the reaction product

Sources & evidence

ORD record
ord-e0ee9011949947d2b0cd5cb79d94f8b4
Source dataset
uspto-grants-2015_06
Patent number
US09045707B2

Reaction notes

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