Claims
- 1. Continuous process for preparing tertiary butyl ester comprising:
I. continuously feeding a gaseous ketene and a liquid reaction composition comprising t-butyl alcohol containing a finite concentration of water to a reaction zone to provide a product comprising an ester of tertiary butyl alcohol; and II. continuously removing said product from said reaction zone.
- 2. Process according to claim 1 wherein said ketene is of the formula
- 3. Process according to claim 2 wherein said reaction zone is maintained at a temperature of about 0 to 100° C.
- 4. Continuous process for preparing tertiary butyl acetate comprising:
I. continuously feeding gaseous ketene and a liquid reaction composition comprising t-butyl alcohol containing about 1 to 5 wt % water into an absorber reactor at a temperature of about 25 to 75° C. to provide a product comprising tertiary butyl acetate; and II. continuously removing said product from said reaction zone.
- 5. Process according to claim 4 wherein said absorber reactor is a packed column or a plate column.
- 6. Process according to claim 5 wherein said gaseous ketene is contacted with said liquid reaction medium in a countercurrent flow.
- 7. Process according to claim 6 further comprising
I. continuously feeding said product from said reaction zone of Step II to a first distillation column; II. continuously removing a lower boiling component comprising tertiary butyl alcohol from the top of said first distillation column III. continuously removing a higher boiling component from the bottom of said first distillation column comprising tertiary butyl acetate IV. recycling said lower boiling component to said absorber reactor
- 8. Process according to claim 7 further comprising
I. continously feeding said higher boiling component from said first distillation column to a second distillation column; II. continuously removing from the top of said second distillation column a lower boiling component comprising tertiary butyl acetate containing lower boiling impurities; and III. continuously removing from the middle of said second distillation column a higher boiling component comprising tertiary butyl acetate; IV. recycling said lower boiling component from said second distillation column to said absorber reactor.
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is a continuation-in-part of application Ser. No. 09/811,715, filed Mar. 19, 2001, incorporated herein by reference, which claims the benefit under 35 USC §119 of U.S. Provisional Application No. 60/229,284 filed Aug. 31, 2000.
Provisional Applications (1)
|
Number |
Date |
Country |
|
60229284 |
Aug 2000 |
US |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
09811715 |
Mar 2001 |
US |
Child |
10108148 |
Mar 2002 |
US |