The present disclosure provides an apparatus and method for producing a policosanol having a specific chromatographic fingerprint. The apparatus of the present disclosure has a feed tank and receiving tanks which are connected to a vacuum system. The method of the present disclosure is carried out by a high vacuum rectification process and includes: firstly, feeding a saponified crude alkanol into a melting tank in which the material is melted and then flows into the feed tank, and then injecting the material into a rectifying still using a delivery pump, followed by first rectification under vacuum condition and sequential collection of fractions at different phases from the tower top and stillage residue from the tower bottom; and after the completion of the rectification of the first batch crude product, carrying out second feeding on the basis of consistent vacuum in the feed tank and the rectifying tower.

A method for separating monoethylene glycol (MEG) from one or more oxygenates. The method includes providing a stream comprising MEG and one or more oxygenates to a distillation column, providing a water feed stream to a bottom of the distillation column, and removing a recovery stream comprising MEG from the distillation column. The distillation column is operated at higher temperatures than the thermal stability of MEG and the one or more oxygenates.

A method for separating monoethylene glycol (MEG) from one or more oxygenates. The method includes providing a stream comprising MEG and one or more oxygenates to a distillation column, providing a water feed stream to a bottom of the distillation column, and removing a recovery stream comprising MEG from the distillation column. The distillation column is operated at higher temperatures than the thermal stability of MEG and the one or more oxygenates.

A method for separating monoethylene glycol (MEG) from one or more oxygenates. The method includes providing a stream comprising MEG and one or more oxygenates to a distillation column, providing a water feed stream to a bottom of the distillation column, and removing a recovery stream comprising MEG from the distillation column. The distillation column is operated at higher temperatures than the thermal stability of MEG and the one or more oxygenates.

The present invention is directed to a process for the purification of ethylene glycol from a crude stream thereof. The process comprises passing the stream of crude ethylene glycol to a first distillation column in which light compounds within the crude stream are separated overhead and a lights-removed crude ethylene glycol stream is removed from at or near the bottom of the first distillation column; passing the lights-removed crude ethylene glycol stream removed from at or near the bottom of the first distillation column to a second distillation column in which purified ethylene glycol is separated and recovered from heavy components present in the lights-removed crude ethylene glycol stream; removing a stream from at or near the bottom of the second distillation column which comprises residual ethylene glycol together with diethylene glycol and heavy compounds and passing said stream to a third distillation column in which the heavy compounds are separated from the stream comprising ethylene glycol and diethylene glycol; and removing the stream comprising ethylene glycol and diethylene glycol from the third distillation column and passing said stream to a fourth distillation column in which the ethylene glycol is separated from the diethylene glycol.

The present invention is directed to a process for the purification of ethylene glycol from a crude stream thereof. The process comprises passing the stream of crude ethylene glycol to a first distillation column in which light compounds within the crude stream are separated overhead and a lights-removed crude ethylene glycol stream is removed from at or near the bottom of the first distillation column; passing the lights-removed crude ethylene glycol stream removed from at or near the bottom of the first distillation column to a second distillation column in which purified ethylene glycol is separated and recovered from heavy components present in the lights-removed crude ethylene glycol stream; removing a stream from at or near the bottom of the second distillation column which comprises residual ethylene glycol together with diethylene glycol and heavy compounds and passing said stream to a third distillation column in which the heavy compounds are separated from the stream comprising ethylene glycol and diethylene glycol; and removing the stream comprising ethylene glycol and diethylene glycol from the third distillation column and passing said stream to a fourth distillation column in which the ethylene glycol is separated from the diethylene glycol.

In a method and a system for decolorizing and deodorizing a polyhydric alcohol according to embodiments of the present invention, a mixture liquid containing a first polyhydric alcohol obtained by a separation process is prepared. The mixture liquid is subjected to a distillation treatment to preliminarily remove substances with different colors and odors to generate a pre-treatment liquid. The pre-treatment liquid is subjected to an adsorption treatment. Through a combination of the distillation treatment and the adsorption treatment, the removing efficiency of the substances with different colors and odors can be increased.

In a method and a system for decolorizing and deodorizing a polyhydric alcohol according to embodiments of the present invention, a mixture liquid containing a first polyhydric alcohol obtained by a separation process is prepared. The mixture liquid is subjected to a distillation treatment to preliminarily remove substances with different colors and odors to generate a pre-treatment liquid. The pre-treatment liquid is subjected to an adsorption treatment. Through a combination of the distillation treatment and the adsorption treatment, the removing efficiency of the substances with different colors and odors can be increased.

A process of producing allyl alcohol by reacting glycerin with ReO.sub.3—Al.sub.2O.sub.3 in the presence of gamma-valerolactone (GVL) in a reactor is described. More specifically, a process to produce allyl alcohol, comprising the step of: a) reacting glycerin with ReO.sub.3—Al.sub.2O.sub.3 in the presence of an inert solvent, GVL, in a reactor, and b) collecting the product comprising allyl alcohol.

A process of producing allyl alcohol by reacting glycerin with ReO.sub.3—Al.sub.2O.sub.3 in the presence of gamma-valerolactone (GVL) in a reactor is described. More specifically, a process to produce allyl alcohol, comprising the step of: a) reacting glycerin with ReO.sub.3—Al.sub.2O.sub.3 in the presence of an inert solvent, GVL, in a reactor, and b) collecting the product comprising allyl alcohol.