C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 67/04 (2006.01) C07C 69/14 (2006.01)
Patent
CA 2565751
A process for the production of ethyl acetate by reacting ethylene with acetic acid and water in the presence of a heteropolyacid catalyst in which the concentrations of reactants in the feed stream to the reactor are such that the mole ratio of ethylene to acetic acid lies in the range 6.0 to 12.2, the mole ratio of ethylene to water lies in the range 8.0 to 17.0 and the mole ratio of acetic acid to water lies in the range 1.25 to 1.40. It has been found that by careful control of the relative concentration of the reactants and of the process operating conditions the relative amounts of methyl ethyl ketone (MEK, 2-butanone) coproduced with the desired ethyl acetate can be reduced and the catalyst life can thereby be extended.
L'invention concerne un procédé d'élaboration d'acétate d'éthyle par réaction entre éthylène, acide acétique et eau, en présence de catalyseur hétéropolyacide. Les concentrations des réactants dans le flux d'alimentation du réacteur sont tels que le rapport molaire éthylène/acide acétique est compris entre 6 et 12,2, que le rapport molaire éthylène/eau est compris entre 8 et 17, et que le rapport molaire acide acétique/eau est compris entre 1,25 et 1,40. On a constaté qu'un contrôle attentif de la concentration relative des réactants et des conditions de déroulement de l'opération permettait de réduire les quantités relatives méthyl éthyl cétone (MEK, 2-butanone) coproduites avec l'acétate d'éthyle recherché, et permettait aussi d'étendre la durée de vie du catalyseur.
Fullerton William
Miller Andrew John
Bp Chemicals Limited
Fetherstonhaugh & Co.
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