A method for removing one or more congeners from an alcoholic composition, including placing a quantity of an alcoholic composition in a pressure-controllable environment, decreasing the pressure of the pressure-controllable environment, removing one or more unwanted congeners from the alcoholic composition to yield a purified alcoholic composition, and removing the purified alcoholic composition from the pressure-controllable environment.

A method for removing one or more congeners from an alcoholic composition, including placing a quantity of an alcoholic composition in a pressure-controllable environment, decreasing the pressure of the pressure-controllable environment, removing one or more unwanted congeners from the alcoholic composition to yield a purified alcoholic composition, and removing the purified alcoholic composition from the pressure-controllable environment.

The disclosure is directed to an apparatus and method for recovering ethanol from a fermentation broth. The fermentation broth comprises microbial biomass, ethanol, methanol, ethyl acetate, at least one thiol, and at least one compound having 3 or more carbon atoms. The method comprises separating at least microbial biomass from the fermentation broth to generate a process stream; removing, in any order, from the process stream: ethyl acetate by reacting ethyl acetate with a base compound followed by distillation; at least one thiol by adsorption or reaction to disulfide; methanol by distillation; compounds having 3 or more carbon atoms by distillation; and recovering ethanol by distillation; wherein the distillations may be conducted in a single column or two or more columns.

The disclosure is directed to an apparatus and method for recovering ethanol from a fermentation broth. The fermentation broth comprises microbial biomass, ethanol, methanol, ethyl acetate, at least one thiol, and at least one compound having 3 or more carbon atoms. The method comprises separating at least microbial biomass from the fermentation broth to generate a process stream; removing, in any order, from the process stream: ethyl acetate by reacting ethyl acetate with a base compound followed by distillation; at least one thiol by adsorption or reaction to disulfide; methanol by distillation; compounds having 3 or more carbon atoms by distillation; and recovering ethanol by distillation; wherein the distillations may be conducted in a single column or two or more columns.

Embodiments described herein provide a method, comprising reducing pH of a glycol vaporization separator purge stream to form an acid stream; distilling the acid stream to form an overhead stream and a bottoms stream; and recycling the bottoms stream to the vaporization separator.

Various aspects of the disclosure relate to 2-[(1R,6R)-6-isopropenyl-3-methylcyclohex-2-en-1-yl]-3-hydroxy-5-pentylphenolate and compositions comprising 2-[(1R,6R)-6-isopropenyl-3-methylcyclohex-2-en-1-yl]-3-hydroxy-5-pentylphenolate.

Various aspects of the disclosure relate to 2-[(1R,6R)-6-isopropenyl-3-methylcyclohex-2-en-1-yl]-3-hydroxy-5-pentylphenolate and compositions comprising 2-[(1R,6R)-6-isopropenyl-3-methylcyclohex-2-en-1-yl]-3-hydroxy-5-pentylphenolate.

A method of and apparatus for recovering an alcohol solvent from a liquid mixture of the solvent and plant oil and decarboxylating the plant oil may include, pressurizing the liquid mixture to a super-atmospheric pressure, recirculating the pressurized liquid mixture a plurality of times through at least one membrane separator to separate some of the solvent from the mixture to provide a concentrated mixture of the plant oil with less solvent, reducing the pressure of the liquid concentrated mixture to less than 15 psig, heating it at a pressure of less than 15 psig to a temperature sufficient to vaporize the solvent in the concentrated mixture, removing sufficient heat from the vaporized solvent to condense it to a liquid solvent at atmospheric pressure and temperature conditions, and heating the plant oil to a temperature desirably of at least 215° F. to decarboxylate the plant oil.

A method of and apparatus for recovering an alcohol solvent from a liquid mixture of the solvent and plant oil and decarboxylating the plant oil may include, pressurizing the liquid mixture to a super-atmospheric pressure, recirculating the pressurized liquid mixture a plurality of times through at least one membrane separator to separate some of the solvent from the mixture to provide a concentrated mixture of the plant oil with less solvent, reducing the pressure of the liquid concentrated mixture to less than 15 psig, heating it at a pressure of less than 15 psig to a temperature sufficient to vaporize the solvent in the concentrated mixture, removing sufficient heat from the vaporized solvent to condense it to a liquid solvent at atmospheric pressure and temperature conditions, and heating the plant oil to a temperature desirably of at least 215° F. to decarboxylate the plant oil.

The presently claimed invention relates to a process for the recovery of 3-methyl-3-buten-1-ol from a stream obtained in the production of 3-methyl-3-buten-1-ol from 2-methylprop-1-ene and formaldehyde, by treating the stream with an amine catalyst.