| 摘要 |
<p>PCT No. PCT/FI96/00538 Sec. 371 Date Jun. 19, 1998 Sec. 102(e) Date Jun. 19, 1998 PCT Filed Oct. 11, 1996 PCT Pub. No. WO97/13567 PCT Pub. Date Apr. 17, 1997An extraction method is disclosed, where organic impurities are removed from a phase essentially containing sulfuric acid, by means of supercritical or liquid carbon dioxide. In particular, the spent sulfuric acid from a process for production of alkylate fuel may be regenerated for re-introduction into the process without incineration.</p> |
