Methyl Acetate → Propylene Glycol

HRID 903028Notes

Reaction equation

HRID 903028 reaction equation
[C:1]([O:4][CH2:5][CH:6]([O:8]C(=O)C)[CH3:7])(=[O:3])[CH3:2].[C:12](OC)(=[O:14])C>CO>[C:1]([O:4][CH3:5])(=[O:3])[CH3:2].[CH3:12][OH:14].[CH2:5]([OH:4])[CH:6]([OH:8])[CH3:7]

Participants

5

Reactant 2

HCID 6584Methyl AcetateHCID 12198Propylene Glycol Diacetate

Product 2

HCID 1030Propylene GlycolHCID 11389366Methyl acetate methanol

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent2×

Conditions

Temperature
62 °C

Procedure

A suspension is prepared from 800 parts of 1,2-diacetoxypropane, 960 parts of methanol and 176 parts of cation exchanger (®Lewatit SPC 108) in a stirred reactor, provided with a distillation unit, by stirring at 300 rpm, and the mixture is heated at 62° C. (The exchange resin is a sulfonated styrene/divinylbenzene copolymer resin; it has a macro-porous structure and a particle size of from 0.3 to 15 mm). 910 parts of the azeotropic mixture of methanol and methyl acetate, of boiling point 54° C., are distilled off in the course of 4 hours. The ion exchanger is then filtered off. Distillation gives 470 parts of a methyl acetate/methanol mixture and 376 parts of 1,2-propanediol.

Workup

  1. customprovided with a distillation unit
  2. distillationof boiling point 54° C., are distilled off in the course of 4 hours
  3. filtrationThe ion exchanger is then filtered off
  4. distillationDistillation

Sources & evidence

ORD record
ord-4a84a36c96df4b4dbf58e30dea49f1ff
Source dataset
uspto-grants-1980_10
Patent number
US04226780

Reaction notes

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