Facile photoinduced pH-adjusting synthesis of high amount framework Ti-containing meso-silica catalyst for cyclohexane oxidation

Wu, Mei; Li, Xinhao; Xu, Wen; Wang, Yuqi; Li, Shuang; Han, Haifeng; Ni, Lingli; Jiang, Jinlong; Chen, Jing

doi:10.1016/j.catcom.2019.105851

Cited by 2 publications

(1 citation statement)

References 31 publications

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“…Due to the excellent catalytic oxidation performance with H 2 O 2 under mild conditions, TS-1 attracted much attention in the last three decades. TS-1-catalyzed reactions include alkene epoxidation, [2][3][4][5][6][7][8] aromatics hydroxylation, [9,10] ketone ammoximation, [11][12][13] alkane oxidation, [14,15] and other oxidative reactions. [16][17][18][19] Tetrahedrally coordinated Ti (framework Ti, [TiO 4 ]) is the main active center for selective oxidation in TS-1.…”

Section: Introductionmentioning

confidence: 99%

Role of Recrystallization in Alkaline Treatment on the Catalytic Activity of 1‐Butene Epoxidation

et al. 2020

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Two alkylol amines, which were ethanolamine (EOA) and triethanolamine (TEOA), were used to posttreat nanosized titanium silicalite‐1 (TS‐1) to improve its catalytic activity for 1‐butene epoxidation. Comparative studies were conducted to clarify the influences of the EOA and TEOA concentrations on the physicochemical properties through detailed characterization. EOA treatment can dissolve the framework Si, [SiO4], on the external surface of TS‐1, generating some macropores. TEOA serves as structure‐directing agent to form MFI topology other than the dissolution of [SiO4], and promotes the recrystallization of [SiO4], forming new TS‐1 particles over the external surface. The two treatments can both improve the catalytic activity of 1‐butene epoxidation, but the samples treated with TEOA exhibit better catalytic stability. This can be attributed to the characteristic recrystallization of [SiO4] in the case of TEOA treatment, stabilizing the structure of TS‐1 and maintaining more framework Ti and intercrystal space.

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Section: Introductionmentioning

confidence: 99%

Role of Recrystallization in Alkaline Treatment on the Catalytic Activity of 1‐Butene Epoxidation

et al. 2020

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A comprehensive and updated review of studies on the oxidation of cyclohexane to produce ketone-alcohol (KA) oil

Abutaleb

Ali

2021

Reviews in Chemical Engineering

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Oxidation of cyclohexane is an essential chemical reaction for the industrial manufacture of cyclohexanol and cyclohexanone. These two compounds, together known as ketone–alcohol (KA) oil, are the main feedstock for nylon 6 and nylon 6,6 productions. Several types of catalysts and reaction conditions have been used for cyclohexane oxidation. This paper presents a thorough literature review of catalytic materials used for cyclohexane oxidation to produce KA oil using oxygen, air and other oxidizing agents as well as utilizing different solvents. This review covers research and development reported over the years 2014–2020. This review aims to comprehend the type of catalysts, solvents, oxidants and other reaction parameters used for the oxidation of cyclohexane. Three types of cyclohexane oxidation processes namely thermocatalytic, photocatalytic and microwave-assisted catalytic have been reported. The results of the review showed that metal and metal oxide loaded silica catalysts performed excellently and provided high selectivity of KA oil and cyclohexane conversion. The use of peroxides is not feasible due to their high price compared to air and oxygen. Gold nanoparticles supported on silica performed with high selectivity and good conversion. The use of hydrochloric acid as an additive was found very effective to enhance the photocatalytic oxidation of cyclohexane. Water on the catalyst surface enhanced the reactivity of the photocatalysts since it helps in the generation of hydroxyl radicals.

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Facile photoinduced pH-adjusting synthesis of high amount framework Ti-containing meso-silica catalyst for cyclohexane oxidation

Cited by 2 publications

References 31 publications

Role of Recrystallization in Alkaline Treatment on the Catalytic Activity of 1‐Butene Epoxidation

Role of Recrystallization in Alkaline Treatment on the Catalytic Activity of 1‐Butene Epoxidation

A comprehensive and updated review of studies on the oxidation of cyclohexane to produce ketone-alcohol (KA) oil

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