Recovery of isopropyl acetate and ethanol from an isopropyl acet

Details Recovery of isopropyl acetate and ethanol from an isopropyl acet Recovery of isopropyl acetate and ethanol from an isopropyl acet

1992-08-11

1995-12-05

Bascomb, Jr., Wilbur

Distillation: processes, separatory

With disparate physical separation

Utilizing liquid-liquid extracting of distillation product

203 73, 203 98, 203DIG11, 560248, 568918, B01D 316, C07C 2986, C07C 6758

Patent

active

RE0351075

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.

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79.09.17, J54119411, JP 54-119411.

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