近临界水中苯甲醛稳定性的研究  

Study on Stability of Benzaldehyde in Near-Critical Water

作　　者：高飞[1] 吕秀阳[1] 

机构地区：[1]浙江大学材料与化工学院制药工程研究所,杭州310027

出　　处：《化学反应工程与工艺》2005年第5期468-471,共4页Chemical Reaction Engineering and Technology

基　　金：国家自然科学基金项目(20476089;20176054)

摘　　要：测定了压力15 MPa,温度260-310 ℃下苯甲醛在近临界水中的稳定性数据。由Arrhenius方程拟合得到苯甲醛分解反应的表观活化能为51．65 kJ／mol。利用气相色谱-质谱(GC／MS)对分解产物进行了定性分析,表明分解产物中除了苯甲醇和苯甲酸外,还有大分子物质,进而探讨了苯甲醛在近临界水中的分解机理。Effects of temperature and residence time on benzaldehyde decomposition in near-critical water were investigated for temperatures from 260℃ to 310 ℃ and pressure at 15 MPa. The evaluated activation energy of benzaldehyde decomposition was 51.65 kJ/mol. Qualitative analysis of benzaldehyde decomposition products was made with gas-chromatgraph/mass-spectrum （GC/ MS）. Besides higher molecular weight products, the existence of benzalcohol and benzoic acid in the products was confirmed. The decomposition mechanism was discussed.

关 键 词：近临界水 苯甲醛 稳定性 

分 类 号：TQ031[化学工程]