초록 ▼

A process for recovering processing liquids such as gas-treating liquids wherein a feed mixture containing the processing liquid and components or impurities that are more volatile and less volatile than the processing liquid is initially heated in a first heating zone to a temperature sufficient to

A process for recovering processing liquids such as gas-treating liquids wherein a feed mixture containing the processing liquid and components or impurities that are more volatile and less volatile than the processing liquid is initially heated in a first heating zone to a temperature sufficient to volatilize at least one of the more volatile components and a portion of the processing liquid, the temperature being maintained below the decomposition temperature of the processing liquid to produce a vapor stream containing the less volatile component and the vaporized portion of the processing liquid and a residuum containing the processing liquid, a reduced concentration of the more volatile components and the less volatile components, the vapor stream being separated from the residuum in a first separation zone, a portion of the residuum being passed through a second heating zone at a temperature below the decomposition temperature of the processing liquid to produce a first heated recycle stream, the heated recycle stream being admixed with the feed mixture to effect the initial heating of the feed mixture, the concentration of the less volatile components in the residuum being reduced, preferably on a continuous basis, any processing liquid present in the vapor stream being recovered for further use.

대표청구항 ▼

[ What is claimed is:] [1.] A continuous process for recovering a processing liquid from a feed mixture, comprising said processing liquid, at least one component that is more volatile than said processing liquid, and at least one component that is less volatile than said processing liquid, comprisi

[ What is claimed is:] [1.] A continuous process for recovering a processing liquid from a feed mixture, comprising said processing liquid, at least one component that is more volatile than said processing liquid, and at least one component that is less volatile than said processing liquid, comprising:introducing said feed mixture into a first heating zone and initially heating said feed mixture to a temperature sufficient to volatilize at least some of said at least one more volatile component and at least a portion of said processing liquid, said temperature in said first heating zone being below the decomposition temperature of said processing liquid, to produce a vapor stream comprising said at least one more volatile component and said vaporized portion of said processing liquid, and a residuum containing said processing liquid, a reduced concentration of said at least one more volatile component, and said at least one less volatile component;separating said vapor stream from said residuum in a first separation zone to produce a separated residuum;passing a first portion of said separated residuum through a second heating zone at a temperature below the decomposition temperature of said processing liquid to produce a heated, first recycle stream;admixing said heated, first recycle stream with said feed mixture to effect said initial heating of said feed mixture;passing a second portion of said separated residuum through a solids/liquid separation zone to remove any solids present in said second portion of said separated residuum and produce a substantially solids-free, second recycle stream, said second recycle stream being recycled to said first separation zone; andrecovering processing liquid from said vapor stream.