| PATENT ASSIGNEE'S COUNTRY | USA |
| UPDATE | 07.99 |
| PATENT ASSIGNEE | This data is not available for free |
| PATENT CLAIMS |
- Continuously feeding to first reaction zone MeOAc (I), MeI (II), Dissolved catalyst comp. comprising rhodium & promo ters (III), AcOH solvent (IV) & CO, wherein CO is fed below surface of liquid reaction mixt to produce first liquid reaction mixt comprising (I), (II), (III), (IV), dissolved CO & acetic anhy dride product - Feeding first liquid reaction mixt from first to second reaction zone comprising reaction vessel in which is maintained a liquid phase comprising first liquid reaction mixt & an over head vapor space wherein total pressure 40 - 50 bar absolu te is maintained, no CO is fed below surface of liquid phase & residence time is > 2 min to produce second liquid reac tion mixt comprising (I), (II), (III), (IV), dissolved CO & acetic anhydride product - Removing second liquid reaction mixt. from second reac tion zone Whereby utilization of CO in process is increased |
| PATENT PHOTOCOPY | Available on request |
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