Hydroxylation of aromatics with hydrogen peroxide over titanosilicates with MOR and MFI structures: effect of Ti peroxo species on the diffusion and hydroxylation activity

Article Abstract:

A study was conducted to analyze shape selectivity in the liquid-phase hydroxylation of aromatic hydrocarbons supporting hydrogen peroxide on two types of titanosilicate. The hydroxylation of aromatic hydrocarbons with H2O2 was performed in a flask reactor at 363 K under vigorous agitation while the liquid-phase adsorption was carried out in a glass cell. Results indicated that the addition of H2O2 to H2O solvent reduced the diffusivity of aromatics.

Hydrogen peroxide, Silicates, Aromatic compounds, Hydroxylation

---

Catalytic performance of [Ti, Al]-beta in the alkene epoxidation controlled by the postsynthetic ion exchange

Article Abstract:

Novel methods for enhancing the epoxide selectivity in the alkene epoxidation over [Ti, Al]-Beta are developed. When as-synthesized [Ti, Al]-Beta was treated with aqueous ammonium nitrate solution and successively calcined at low temperature, a dramatic enhancement of epoxide selectivity was attained in the liquid-phase epoxidation of cyclohexene using H2O2 as an oxidant in protic solvent methanol.

Science & research, Nitrogenous Fertilizer Manufacturing, Cyclic crudes and intermediates, Nitrogenous fertilizers, Cyclohexane, Ammonium Nitrate, Photochemical research, Chemical synthesis, Olefins, Alkenes, Epoxy compounds

---

A novel titanosilicate with MWW structure. I. Hydrothermal synthesis, elimination of extra framework titanium, and characterizations

Article Abstract:

A novel MWW-type titanosilicate containing the tetrahedral Ti species in the framework is successfully prepared. This is achieved by an acid treatment on a corresponding lamellar precursor, which is hydrothermally synthesized with the coexistence of boron and titanium using piperidine (PI) or hexamethyleneimine (HM) as a structure-directing agent.

Industrial Organic Chemicals, Heterocyclics NEC, Spectra, Titanium dioxide, Heterocyclic aromatic compounds, Structure

Similar abstracts:

• Abstracts: Interaction of Hydrogen Chloride with Thin Ice Films: the Effect of Ice Morphology and Evidence for Unique surface species on Crystalline Vapor-Deposited ice
• Abstracts: Cation migration in zeolites: an in situ powder diffraction and MAS NMR study of the structure of zeolite Cs(Na)-Y during dehydration
• Abstracts: Evaluation of pore structure in pure silica zeolite MFI low-k thin films using positronium annihilation lifetime spectroscopy
• Abstracts: Catalytic monolayer voltammetry and in situ scanning tunneling microscopy of copper nitrite reductase on cysteamine-modified Au(111) electrodes
• Abstracts: Relaxation dynamics in glycerol-water mixtures: I. Glycerol-rich mixtures. Chair-chair conformational flexibility of monosaccharides linked to the anomer equilibrium

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.