Synthesis of 2-butanone in carbon dioxide-enriched near-critical water

2-Butaneone was synthesized from pinacol rearrangement of 2,3-butanediol (BDL) dehydration by using a cleaner and more environment benign approcah, which reaction systhem was in near-critical water (NCW). The result showed that the addition of carbon dioxide was benefit for the conversiotn of BDL while was not advantageous for the yeild of 2-butaneone. According the experimental results, the mechanism of dehydration of BDL in NCW was proposed.