Recovery of isopropyl acetate and ethanol from an isopropyl acetate ethanol and water-containing stream
USRE35107E · kind E · reissue
Assignee
Inventor
Key dates
| Filing date | Aug 11, 1992 |
| Grant date | Dec 5, 1995 |
| Priority date | — |
| Expiry date | Aug 11, 2012 |
Classification
- Technology area (CPC —)General
Abstract
High purity isopropyl acetate and ethanol are recovered from a process stream containing isopropyl acetate, ethanol and water by a multiple step process including extracting substantially all of the ethanol from the stream using water as a solvent, stripping the extract stream to remove substantially all of the remaining isopropyl acetate as an overhead recycle stream, which is combined with the fresh feed stream prior to the extraction step, fractionating the ethanol-rich stripping column bottoms stream to produce a ethanol-water azeotropic overhead stream and using a portion of the fractionating column bottoms stream as the solvent for the extraction step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.