Chromium-containing small pore mesoporous silicas: Synthesis, characterization and catalytic behavior in the liquid phase oxidation of cyclohexane

Synthesis, Characterization and Catalytic Activity of Dialdehyde Starch-Schiff Base Co(II) Complex in the Oxidation of Cyclohexane

“…However, difficulty of recovery is one of the major drawbacks of these homogeneous catalysts, so a great deal of efforts has been devoted to the development of heterogeneous catalysts [12][13][14][15][16][17][18][19][20]. The encapsulation in zeolites [16,19,20], the grafting on polymers [12,18] or silica [13][14][15]17] have been used as supporting methods.…”

An Efficient and Reusable Catalyst of Bismuth-Containing SBA-15 Mesoporous Materials for Solvent-free Liquid Phase Oxidation of Cyclohexane by Oxygen

“…In recent years, there are some reports on using other redox molecular sieves as catalyst for this reaction, such as metal heteroatom (Fe, Mn, Co, or Ce)-containing aluminophosphate [11,13,15], Au/ZSM-5, Co/ZSM-5 [12,14], metal heteroatom (Cr, Bi, or Au)-containing MCM-41, MCM-48, or small pore mesoporous silica [16][17][18][19], and Au/SBA-15 [20]. As shown in Table 4, the KA-oil yield of lower than 15.7% is obtained while using most of these catalysts.…”

“…Various metal heteroatoms, such as Cr [22], Mn [23], Ti [24,25], Fe [26], Zr [27], Ga [28,29], Al [30,31], and V [32], have been incorporated in the framework of SBA-15, and most of them have been tested for their catalytic activities in a certain reaction. According to the literatures, metal heteroatom-containing aluminophosphate, ZSM-5, MCM-41, MCM-48 or small pore mesoporous silica has been used as catalyst for cyclohexane oxidation [11][12][13][14][15][16][17][18][19][20]. However, to the best of our knowledge, no research has been reported on using heteroatom-incorporated SBA-15 as catalyst for the selective oxidation of cyclohexane with O 2 in a solvent-free system.…”

“…In recent years, redox molecular sieves have been studied extensively as catalysts for cyclohexane oxidation using oxygen as oxidant in a solvent-free system [11][12][13][14][15][16][17][18][19][20]. SBA-15 mesoporous molecular sieves, synthesized by , have attracted considerable attention due to its tunable pore diameter, thicker walls, high hydrothermal stability and potential applications in a wide variety of fields [21].…”

Influence of Organic Additives on Catalysts of Liquid-Phase Cyclohexane Oxidation

“…These products are used as raw materials for the synthesis of polyamide fibers -nylon and kapron [1][2][3][4][5]12].…”