The invention relates to a process for treating an hydroalcoholic feedstock comprising ethanol and butanol in order to produce an ethanol-rich effluent, a water-rich effluent and a butanol-rich effluent, comprising a) a water-ethanol separation step comprising a distillation column fed with said hydroalcoholic feedstock and comprising at least 14 theoretical plates, a molar reflux ratio of less than or equal to 1.2, a side withdrawal in the butanol accumulation zone and two injections of recycled streams resulting from steps b) and c); b) a demixing step comprising a section for mixing the stream withdrawn in step a) and the fraction withdrawn in step c), and a decanting section, the heavy phase being recycled to the distillation column of step a); c) a butanol separation step comprising a distillation column fed with the light phase resulting from step b), comprising a side withdrawal of a water/butanol/ethanol fraction recycled to the mixing section of step b) and producing a butanol-rich effluent and an ethanol-water distillate which is recycled to the distillation column of step a). This process appears to be particularly advantageous for the treatment of the hydroalcoholic effluent from the Lebedev process.

The invention relates to a process for treating an hydroalcoholic feedstock comprising ethanol and butanol in order to produce an ethanol-rich effluent, a water-rich effluent and a butanol-rich effluent, comprising a) a water-ethanol separation step comprising a distillation column fed with said hydroalcoholic feedstock and comprising at least 14 theoretical plates, a molar reflux ratio of less than or equal to 1.2, a side withdrawal in the butanol accumulation zone and two injections of recycled streams resulting from steps b) and c); b) a demixing step comprising a section for mixing the stream withdrawn in step a) and the fraction withdrawn in step c), and a decanting section, the heavy phase being recycled to the distillation column of step a); c) a butanol separation step comprising a distillation column fed with the light phase resulting from step b), comprising a side withdrawal of a water/butanol/ethanol fraction recycled to the mixing section of step b) and producing a butanol-rich effluent and an ethanol-water distillate which is recycled to the distillation column of step a). This process appears to be particularly advantageous for the treatment of the hydroalcoholic effluent from the Lebedev process.

The invention relates to a process for treating an hydroalcoholic feedstock comprising ethanol and butanol in order to produce an ethanol-rich effluent, a water-rich effluent and a butanol-rich effluent, comprising a) a water-ethanol separation step comprising a distillation column fed with said hydroalcoholic feedstock and comprising at least 14 theoretical plates, a molar reflux ratio of less than or equal to 1.2, a side withdrawal in the butanol accumulation zone and two injections of recycled streams resulting from steps b) and c); b) a demixing step comprising a section for mixing the stream withdrawn in step a) and the fraction withdrawn in step c), and a decanting section, the heavy phase being recycled to the distillation column of step a); c) a butanol separation step comprising a distillation column fed with the light phase resulting from step b), comprising a side withdrawal of a water/butanol/ethanol fraction recycled to the mixing section of step b) and producing a butanol-rich effluent and an ethanol-water distillate which is recycled to the distillation column of step a). This process appears to be particularly advantageous for the treatment of the hydroalcoholic effluent from the Lebedev process.

Systems and methods in accordance with the present invention provide for the efficient distillation of ethanol in an ethanol plant including a beer column. Heat is captured in the distillation process and utilized to drive operations in the ethanol plant.

Systems and methods in accordance with the present invention provide for the efficient distillation of ethanol in an ethanol plant including a beer column. Heat is captured in the distillation process and utilized to drive operations in the ethanol plant.

What is provided is a carbon dioxide treatment device having high energy efficiency for recovering and reducing carbon dioxide, and a method of producing a carbon compound using the carbon dioxide treatment device. In a carbon dioxide treatment device (100) including a recovery device (1) that recovers carbon dioxide, an electrochemical reaction device (2) that electrochemically reduces carbon dioxide recovered by the recovery device (1), and a homologation reaction device (4) that increases the number of carbons by multimerizing ethylene generated when carbon dioxide is reduced in the electrochemical reaction device (2), and in an absorption unit (12) of the recovery device (1), carbon dioxide gas is absorbed into an absorption liquid (A1), an absorption liquid (A2) that has absorbed carbon dioxide is heated in a discharge unit (13), and a carbon dioxide gas (G3) is discharged, and heat generated in a multimerization reaction in a homologation reaction device (4) is used to heat the absorption liquid (A2) in the discharge unit (13).

What is provided is a carbon dioxide treatment device having high energy efficiency for recovering and reducing carbon dioxide, and a method of producing a carbon compound using the carbon dioxide treatment device. In a carbon dioxide treatment device (100) including a recovery device (1) that recovers carbon dioxide, an electrochemical reaction device (2) that electrochemically reduces carbon dioxide recovered by the recovery device (1), and a homologation reaction device (4) that increases the number of carbons by multimerizing ethylene generated when carbon dioxide is reduced in the electrochemical reaction device (2), and in an absorption unit (12) of the recovery device (1), carbon dioxide gas is absorbed into an absorption liquid (A1), an absorption liquid (A2) that has absorbed carbon dioxide is heated in a discharge unit (13), and a carbon dioxide gas (G3) is discharged, and heat generated in a multimerization reaction in a homologation reaction device (4) is used to heat the absorption liquid (A2) in the discharge unit (13).

This disclosure describes energy efficient process to distill a process stream in a production facility. A process uses multiple effect evaporators, ranging from one evaporator to eight evaporators in each effect. The process arrangement shows an example of four effect evaporators, with a zero-effect evaporator having a single evaporator, a first-effect evaporator having a set of three evaporators, a second-effect evaporator having a set of three evaporators, and a third-effect evaporator having a set of evaporators to create condensed distillers solubles.

This disclosure describes energy efficient process to distill a process stream in a production facility. A process uses multiple effect evaporators, ranging from one evaporator to eight evaporators in each effect. The process arrangement shows an example of four effect evaporators, with a zero-effect evaporator having a single evaporator, a first-effect evaporator having a set of three evaporators, a second-effect evaporator having a set of three evaporators, and a third-effect evaporator having a set of evaporators to create condensed distillers solubles.

An assembly for rehabilitating alcohol, including a pressure controllable chamber, a cooler in thermal communication with the pressure controllable chamber, a liquid inlet port in fluidic communication with the pressure controllable chamber, a liquid outlet port in fluidic communication with the pressure controllable chamber, and a gas outlet port in fluidic communication with the pressure controllable chamber. The assembly further includes a partial vacuum source in fluidic communication with the gas outlet port for establishing a partial vacuum in the pressure controllable chamber, and a liquid collection vessel in fluidic communication with the liquid outlet port. The residence time from when a liquid is flowed into the pressure controllable chamber until the liquid exits the chamber is no more than sixty seconds. The partial vacuum is insufficient to evaporate an ethanol solution during residence time in the pressure controllable chamber.