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Document Number
US Patent 7553397
Issued Date
June 30, 2009
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Abstract
A process is described for the recovery of substantially pure ethyl acetate from a feedstock including ethyl acetate, ethanol and water. The process includes supplying the feedstock to a first distillation zone maintained under first distillation conditions effective for distilling from the feedstock a first distillate including ethyl acetate, ethanol, and less than about 10 mol % water. The first distillate is recovered from the first distillation zone and is supplied to a second distillation zone maintained under second distillation conditions, which include use of a higher pressure than that of the first distillation zone. The second distillation conditions are effective for distilling from the first distillate a second distillate including ethanol, water, and a minor proportion of ethyl acetate and yielding a substantially pure ethyl acetate bottom product, which is recovered. The second distillate is returned to the first distillation zone.
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Number of Claims:
13
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Published
June 30, 2009
Application Number
09/806,180
Filed
September 29, 1999
US Classification
203/14   203/19 203/75 203/77 203/78 203/80 560/248 568/890 568/913 568/916
Int'l Classification
B01D   3/00   (20060101)   C07C   45/82   (20060101)   C07C   67/54   (20060101)  
Attorney/Law Firm
Priority Data
Oct 01, 1998 [EP] 98308010
USPTO Field of Search
203/14   203/19   203/75   203/77   203/78   203/80   560/248   258/890   258/913   258/916  
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