Halogenation of Diamantane by Halomethanes Under the Action of Zeolites

Catalytic chlorination and bromination of diamantane with halomethanes was performed under the action of zeolites NaY-mmm, HY-mmm, and FeHY-mmm. Optimal ratios of the catalyst, reagents and conditions for selective synthesis of chloro- and bromo-substituted diamantanes were found.     

Role of the Aluminophosphate Gel Aging Stage in Controlling the Morphology and Secondary Pore Structure of AlPO4-11 Molecular Sieves

Kinetics and Catalysis - The effect of the aging stage on the chemical and phase composition and pore structure characteristics of aluminophosphate gels synthesized using boehmite and phosphoric...     

Selective dimerization of higher cycloolefins in the presence of micro- and micromesoporous zeolite catalysts

Selective synthesis of dimers of cycloolefins C₆-C₈ was carried out in the presence of highly dispersed zeolite catalysts HY, HBeta, and HZSM-12 and granulated zeolite HY-WB, which differ in acidic properties and pore structure. The high selectivity of microporous zeolite HZSM-12 in cyclohexene dimerization (100%) and micromesoporous zeolite HY-WB in cycloheptene and cyclooctene dimerization (90–95%) was established.     

Synthesis and adsorption properties of the cation exchange forms of OFF-type zeolite

The possibility of the ion-exchange of Na⁺ and K⁺ cations contained in OFF-type zeolite for H⁺, Ni²⁺, Cu²⁺, Co²⁺, and La³⁺ cations is investigated. Chemical and phase compositions, the morphology of crystals, and the adsorption properties of synthesized samples are studied via X-ray fluorescence and X-ray diffraction analysis, IR spectroscopy, scanning electron microscopy, and adsorption measurements.     

Methylation of aniline and its derivatives with dimethyl carbonate in the presence of binder-free micro-, meso-, and macroporous zeolites KNaX,NaY, and HY

Aniline and its derivatives undergo methylation when treated with dimethyl carbonate in the presence of binder-free micro-, meso-, and macroporous zeolites KNaX, NaY, and HY leading to the formation of N-methyl- and N,N-dimethylanilines.     

Hydrogenation of α-methylstyrene linear dimers in the presence of Pd- and Ni-containing catalysts

Hydrogenation of α-methylstyrene linear dimers and of 4-methyl-2,4-diphenylpentane on commercial Pd-containing and Ni (GM-3 grade) catalysts was studied under the following conditions: T = 75–190°C, P(H₂) = 0.2–0.8 MPa, G _c = 2.5–10 wt %, and τ = 1–4 h.     

Co-aggregation of fullerene C60 and thiophene in the non-aromatic solvent cyclohexene

Co-aggregation of fullerene C₆₀ and thiophene has been studied calorimetrically in cyclohexene at 25 °C. The total aggregation heat is found to depend on initial concentration of thiophene and fall between −1.9 and −5.8 kJ mol⁻¹. The corresponding thiophene/fullerene molar ratio (“co-aggregation number”) ranges from 7 to 12. The data are rationalized by formation of heteromolecular nanoaggregates with intermolecular contacts of both fullerene–thiophene and fullerene–fullerene types. A physical model describing interaction between fullerenes and π-donors in solution is substantiated and used to explain heterogeneity of composites containing fullerenes.     

Granulated Hierarchical Zeolite Y and Dealuminated Samples Based on It in Pentene Oligomerization

Kinetics and Catalysis - The catalytic properties of a number of FAU (Y) zeolite samples (microporous zeolite H-Y, granular hierarchical zeolite H-Yh, zeolite H-USYh dealuminated by...