The methods apparatuses described herein involve recovering of glycol from an aqueous phase to form a stream of recovered glycol and a glycol recovery system. The aqueous phase is fed to the top of a lower theoretical stage in a distillation column. An overhead vapor stream is drawn from the distillation column overhead of an upper theoretical stage, and a bottom stream comprising a stream of regenerated glycol is drawn from the distillation column via a bottom outlet configured below the lower theoretical stage. The stream of recovered glycol comprises the regenerated glycol. In addition, a first middle theoretical stage is situated within the distillation column gravitationally above the lower theoretical stage and below the upper theoretical stage. A side stream of liquid water is drawn from the bottom of the upper theoretical stage in the distillation column.

The claimed invention provides a technique wherein the two column system is combined into a single column. The light components are concentrated on the prefractionation side (feed side) of the column, where they are removed as an overhead top product. The middle boiling components are removed as an overhead product on the opposite side of dividing wall. For the same product specifications, top divided column requires substantially lower capital and operating cost than a conventional two-column system.

Provided are a purification device and method. The purification device and method make most use of an internal heat source in the distillation column in the process of distilling the raw material, and reduce use of an external heat source. Thereby, the purification device and method can improve energy efficiency of all the processes.

The present application relates to a distillation device. The distillation device of the present application can minimize energy loss occurring in a purification process of the olefin monomer, the solvent, and the raw material including, for example, 1-octene, iso-octene, and n-hexane, used in a polymerization process of the polyolefin elastomer, and can increase economic efficiency by isolating a high-purity product.

The present disclosure relates to a method and an apparatus for decomposing a phenolic by-product generated in a bisphenol A preparation process, the method including: a step (S10) of feeding the phenolic by-product to a multistage reactive distillation column; a step (S20) of separating the phenolic by-product into an upper discharge stream containing an active component, a side discharge stream containing acetophenone, and a bottom discharge stream containing tar by the multistage reactive distillation column; and a step (S30) of mixing the side discharge stream discharged from the multistage reactive distillation column and the bottom discharge stream discharged from the multistage reactive distillation column to form a mixed discharge stream.

The present disclosure relates to a method and an apparatus for decomposing a phenolic by-product generated in a bisphenol A preparation process, the method including: a step (S10) of feeding the phenolic by-product to a multistage reactive distillation column; a step (S20) of separating the phenolic by-product into an upper discharge stream containing an active component, a side discharge stream containing acetophenone, and a bottom discharge stream containing tar by the multistage reactive distillation column; and a step (S30) of mixing the side discharge stream discharged from the multistage reactive distillation column and the bottom discharge stream discharged from the multistage reactive distillation column to form a mixed discharge stream.

Heat integrated distillation column for separating components in a fluid mixture. The heat integrated distillation column is provided with a stripper part (S), a rectifier part (R) and a compressor (2) between the stripper part (S) and the rectifier part (R). Furthermore, a heat exchange assembly for transferring heat between the stripper part (S) and the rectifier part (R), and a mass transfer assembly for condensation and vaporization in the heat integrated distillation column are provided. The stripper part (S), the rectifier part (R), or the stripper part (S) and rectifier part (R), comprise a channel formed by adjacent channel assemblies (6), each forming a structural part of the heat integrated distillation column and a functional part of the heat exchange assembly and of the mass transfer assembly. A plate (8) and a structured packing in the form of two or more corrugated plates (7) are provided.

Heat integrated distillation column for separating components in a fluid mixture. The heat integrated distillation column is provided with a stripper part (S), a rectifier part (R) and a compressor (2) between the stripper part (S) and the rectifier part (R). Furthermore, a heat exchange assembly for transferring heat between the stripper part (S) and the rectifier part (R), and a mass transfer assembly for condensation and vaporization in the heat integrated distillation column are provided. The stripper part (S), the rectifier part (R), or the stripper part (S) and rectifier part (R), comprise a channel formed by adjacent channel assemblies (6), each forming a structural part of the heat integrated distillation column and a functional part of the heat exchange assembly and of the mass transfer assembly. A plate (8) and a structured packing in the form of two or more corrugated plates (7) are provided.

The invention relates to a retaining device for retaining a heat and/or mass exchange means intended for a heat and/or mass exchange column and having at least one flexible strip in which there are formed at least two cutouts, the strip extending predominantly in a main direction of extension between two longitudinal ends. The cutouts are configured to adjust a dimension of elongation of the strip, in the main direction of extension, to suit a dimension of the heat and/or mass exchange column.

The invention relates to a retaining device for retaining a heat and/or mass exchange means intended for a heat and/or mass exchange column and having at least one flexible strip in which there are formed at least two cutouts, the strip extending predominantly in a main direction of extension between two longitudinal ends. The cutouts are configured to adjust a dimension of elongation of the strip, in the main direction of extension, to suit a dimension of the heat and/or mass exchange column.