摘要:
Ethanol production from the hydrogenation of acetic acid requires energy to drive the hydrogenation reaction and the purification of the crude ethanol product. Heat integration process to recover heat from one part of the production process to be used within the process improves efficiencies and reduces costs.
摘要:
Recovery of ethanol from a crude ethanol product obtained from the hydrogenation of acetic acid using a low energy process. The crude ethanol product is separated in a column to produce a distillate stream comprising acetaldehyde and a residue stream comprising ethanol, acetic acid, ethyl acetate and water. The ethanol product is recovered from the residue stream.
摘要:
Recovery of ethanol from a crude ethanol product obtained from the hydrogenation of acetic acid by hydrolyzing a portion of the crude ethanol product or one or more derivative streams obtained therefrom. The one or more derivative streams comprise ethyl acetate and the hydrolyzed stream is directly or indirectly fed to the distillation zone or the hydrogenation reactor.
摘要:
Ethanol production process for recovering ethanol from a crude ethanol product obtained from the hydrogenation of acetic acid. Ethanol recovery is improved by esterifying a vapor crude ethanol product to reduce unreacted acetic acid concentration.
摘要:
Purifying and/or recovery of ethanol from a crude ethanol product obtained from the hydrogenation of acetic acid. Separation and purification processes of crude ethanol mixture are employed to allow recovery of ethanol and remove impurities. In addition, the process involves returning acetaldehyde separated from the crude ethanol product to the reactor.
摘要:
A denatured fuel ethanol composition for blending with fuels, including gasoline and diesel fuel. The composition includes an ethanol composition comprising at least 92 wt. % ethanol; and from 95 wppm to 1,000 wppm isopropanol; and at least 1.96 vol. % fuel denaturant.
摘要:
Recovery of ethanol from a crude ethanol product obtained from the hydrogenation of acetic acid and by reacting a portion of the crude ethanol product or one or more derivative streams containing ethyl acetate obtained therefrom in the presence of hydrogen, via hydrogenolysis. The one or more derivative streams comprise ethyl acetate that are reacted in via hydrogenolysis form additional ethanol that may be directly or indirectly fed to the separation zone or the hydrogenation reactor.
摘要:
A crude ethanol product obtained from the hydrogenation of acetic acid comprises ethanol and ethyl acetate. Using a distillation column operated at a pressure of from 0.1 to 100 kPa, the ethyl acetate and ethanol may be effectively separated. In addition, maintaining the amount of water that is fed to the distillation column to an amount less than 10 wt. %, based on the weight of all components fed to the distillation column, provides an energy benefit.
摘要:
To reduce acetal concentrations when separating ethanol from a crude product in one or more distillation column, at least one of the columns is operated at a higher pressure to increase the equilibrium constant that favors hydrolysis of the acetal. The crude product may comprise ethanol, acetaldehyde, water and one or more acetals, such as diethyl acetal. The acetal concentration may be reduced thus reducing the need to separate acetal from the crude product.
摘要:
Recovery of ethanol from a crude ethanol product obtained from the hydrogenation of acetic acid. The crude ethanol product is fed to a distillation column to yield an ethanol sidestream.