Acetaldehyde → AcOH AcOAc

HRID 1414137Notes

Reaction equation

HRID 1414137 reaction equation
[C:1]([O:4][C:5](=[O:7])[CH3:6])(=[O:3])[CH3:2].C(=O)C.O=O>[Cu].[Co].C(O)(=O)C>[C:1]([OH:4])(=[O:3])[CH3:2].[C:1]([O:4][C:5](=[O:7])[CH3:6])(=[O:3])[CH3:2]

Participants

7

Reactant 3

HCID 177Acetaldehyde2×HCID 977OxygenHCID 7918Acetic Anhydride

Product 1

HCID 21895370AcOH AcOAc

Reagents, catalysts & solvents 3

HCID 23978CopperCatalystHCID 104730CobaltCatalystHCID 176Acetic AcidSolvent

Procedure

A process for the continuous production of acetic acid and acetic anhydride by reacting acetaldehyde by oxidizing it with gaseous oxygen in liquid phase in the presence of copper acylate and cobalt acylate as a catalyst and in the presence of an aliphatic carboxylic acid ester as a diluent in a reaction zone, which comprises: effecting the reaction at temperatures of 62° to 90° C. over a period of less than 20 minutes with the use of the diluent and acetaldehyde in a quantitative ratio of 60:40 to 40:60; delivering the resulting reaction products to a distilling zone; distilling overhead the carboxylic acid ester and water; separating the carboxylic acid ester phase from the water phase and recycling the organic phase with a reflux ratio of at least 1:1 to the distilling zone; delivering base product accumulating in the distilling zone to an evaporating zone and evaporating it therein so as to obtain 2 to 12 parts by weight of an acetic acid/acetic anhydride-mixture as distillate per part by weight of catalyst solution as base product.

Workup

  1. customthe resulting reaction products to a distilling zone
  2. distillationdistilling overhead the carboxylic acid ester and water
  3. customseparating the carboxylic acid ester phase from the water phase
  4. customevaporating it

Sources & evidence

ORD record
ord-513780b30f224327b20cfe0df78750cb
Source dataset
uspto-grants-1981_02
Patent number
US04252983

Reaction notes

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