| PATENT ASSIGNEE'S COUNTRY | USA |
| UPDATE | 07.99 |
| PATENT ASSIGNEE | This data is not available for free |
| PATENT CLAIMS |
Process for coproducing purified fumaric acid & maleic anhy dride comprising (a) Deriving a compn comprising molten maleic anhydride & fumaric acid from a system for the catalytic oxidation of bu tane by (1) Deriving a stream comprising vapor phase MAN from a system for the catalyticoxidation of butane (2) Condensing a portion of said MAN vapor & separating crude MAN thus formed from uncondensed MAN vapor (3) Deriving aq soln of maleic acid by adding water to the uncondensed maleic anh. vapor at a T sufficient to form maleic acid without forming fumaric acid (4) Dehydrating the maleic acid soln & recovering a crude maleic anh. stream & a dehydrator bottoms stream com prising molten maleic anh. & fumaric acid (b) Cooling the dehydrator bottoms stream to T sufficient to precipitate the fumaric acid (c) Separating the fumaric acid ppcc from (b) from the molten maleic anh., removing residual maleic anh. from the fuma ric acid ppcc, & recovering purified fumaric acid & (d) Distilling crude maleic anh. stream obtained in (a4) & the crude maleic anh, obtained in (a2) to obtain pure maleic anh. |
| PATENT PHOTOCOPY | Available on request |
|
Want more information ? Interested in the hidden information ? Click here and do your request. |