CAJ | 학술논문

为了开发甲苯液相氧化的新催化体系，寻求合适的反应条件提高甲苯选择性氧化生成苯甲醛、苯甲醇的选择性。以分子氧为氧源，在无溶剂条件下，采用N-羟基邻苯二甲酰亚胺(NHPI)与双水杨醛缩乙二胺合钴配合物(Co(Salen))复合催化甲苯液相氧化反应。详细考察了NHPI单独催化以及NHPI与Co(Salen)复合催化过程中NHPI用量、Co(Salen)用量、反应温度、反应时间和氧压对甲苯选择性氧化反应的影响。结果表明：在甲苯0.22 mol，NHPI的摩尔分数2%，Co(Salen)的摩尔分数0.02%，氧压1.60 MPa，110℃的条件下反应2 h，甲苯转化率达到13.6%，苯甲醛选择性32.7%，苯甲醇选择性10.8%，苯甲醛、醇、酸总选择性达97.7%，该反应条件为较佳的工艺条件。
위료개발갑분액상양화적신최화체계，심구합괄적반응조건제고갑분선택성양화생성분갑철、분갑순적선택성。이분자양위양원，재무용제조건하，채용N-간기린분이갑선아알(NHPI)여쌍수양철축을이알합고배합물(Co(Salen))복합최화갑분액상양화반응。상세고찰료NHPI단독최화이급NHPI여Co(Salen)복합최화과정중NHPI용량、Co(Salen)용량、반응온도、반응시간화양압대갑분선택성양화반응적영향。결과표명：재갑분0.22 mol，NHPI적마이분수2%，Co(Salen)적마이분수0.02%，양압1.60 MPa，110℃적조건하반응2 h，갑분전화솔체도13.6%，분갑철선택성32.7%，분갑순선택성10.8%，분갑철、순、산총선택성체97.7%，해반응조건위교가적공예조건。
For development of a new catalysis system for liquid phase oxidation of toluene to improve the selectivity of intermediate products benzaldehyde and benzyl alcohol at appropriate reaction conditions, N-hydroxylphthalimide (NHPI) and N,N′-bis(salicylidene) ethylenediiminocobalt (Co(Salen)) composite were adopted to catalyze the liquid-phase oxidation of toluene with oxygen molecular without any solvent. The effects of the amount of NHPI catalyst and NHPI/Co(Salen) composite catalyst, reaction temperature, reaction time and O2 pressure on the selectivity oxidation of toluene were investigated carefully. The results showed that the conversion of toluene was 13.6%, the selectivity of benzaldehyde and benzyl alcohol were 32.7%and 10.8%respectively, the total selectivity to benzaldehyde, benzyl alcohol and benzoic acid was up to 97.7%, under the optimum conditions of toluene 0.22 mol, NHPI molar fraction 2%, Co(Salen) molar fraction 0.02%, oxygen pressure 1.60 MPa and temperature of 110 ℃ for 2 h.