Separation of ethyl acetate from ethanol and water by extractive distillation
OwnerLloyd Berg, Pisant Ratanapupechinventors
Life of this patent
Estimating the term…
Abstract
Ethyl acetate cannot be completely removed from ethanol and water mixtures by distillation because of the presence of the minimum ternary azeotrope. Ethyl acetate can be readily removed from mixtures containing it, ethanol and water by using extractive distillation in which the extractive distillation agent is a higher boiling oxygenated of nitrogenous organic compound or a mixture of these. Typical examples of effective agents are: dimethylsulfoxide, glycerine and diethylene glycol, 1-naphthol, hydroquinone and N,N-dimethylformamide.
Claims9
A method for recovering ethyl acetate from a mixture of ethyl acetate, ethanol and water which comprises distilling a mixture of ethyl acetate, ethanol and water in a rectification column in the presence of an effective amount of an extractive agent, recovering essentially pure ethyl acetate as overhead product and obtaining the extractive agent, ethanol and water from the stillpot or reboiler, the extractive agent includes dimethylsulfoxide.
A method for recovering ethyl acetate from a mixture of ethyl acetate, ethanol and water which comprises distilling a mixture of ethyl acetate, ethanol and water in a rectification column in the presence of an effective amount of an extractive agent, recovering essentially pure ethyl acetate as overhead product and obtaining the extractive agent, ethanol and water from the stillpot or reboiler, the extractive agent includes N,N-dimethylformamide.
A method for recovering ethyl acetate from a mixture of ethyl acetate, ethanol and water which comprises distilling a mixture of ethyl acetate, ethanol and water in a rectification column in the presence of an effective amount of an extractive agent, recovering essentially pure ethyl acetate as overhead product and obtaining the extractive agent, ethanol and water from the stillpot or reboiler, the extractive agent includes ethylene glycol.
A method for recovering ethyl acetate from a mixture of ethyl acetate, ethanol and water which comprises distilling a mixture of ethyl acetate, ethanol and water in a rectification column in the presence of an effective amount of an extractive agent, recovering essentially pure ethyl acetate as overhead product and obtaining the extractive agent, ethanol and water from the stillpot or reboiler, the extractive agent includes propylene glycol.
A method for recovering ethyl acetate from a mixture of ethyl acetate, ethanol and water which comprises distilling a mixture of ethyl acetate, ethanol and water in a rectification column in the presence of an effective amount of an extractive agent, recovering essentially pure ethyl acetate as overhead product and obtaining the extractive agent, ethanol and water from the stillpot or reboiler, the extractive agent includes a mixture of diethylene glycol and dioctylphthalate.
A method for recovering ethyl acetate from a mixture of ethyl acetate, ethanol and water which comprises distilling a mixture of ethyl acetate, ethanol and water in a rectification column in the presence of an effective amount of an extractive agent, recovering essentially pure ethyl acetate as overhead product and obtaining the extractive agent, ethanol and water from the stillpot or reboiler, the extractive agent includes a mixture of diethylene glycol and diisooctylphthalate.
A method for recovering ethyl acetate from a mixture of ethyl acetate, ethanol and water which comprises distilling a mixture of ethyl acetate, ethanol and water in a rectification column in the presence of an effective amount of an extractive agent, recovering essentially pure ethyl acetate as overhead product and obtaining the extractive agent, ethanol and water from the stillpot or reboiler, the extractive agent includes a mixture of hydroquinone and ethylacetoacetate.
Dependencies are inferred from the claim text.