Buscar
Mostrando ítems 1-10 de 38
Faujasites exchanged with alkylammonium cations applied to basic catalysis
(Elsevier B.V., 2019-07-01)
NaX and NaY faujasites (with Si/Al ratios of 1.3 and 2.5, respectively) were subjected to different degrees of ionic exchange with linear monoalkylammonium cations containing between 1 and 6 carbon atoms. The products were ...
Preparation and evaluation of inclusion complexes of commercial sunscreens in cyclodextrins and montmorillonites: Performance and substantivity studies
(Taylor & Francis IncPhiladelphiaEUA, 2008)
Aplicação de peneiras moleculares contendo cátions orgânicos em catálise básica
(Universidade Federal de São CarlosBRUFSCarPrograma de Pós-Graduação em Engenharia Química - PPGEQ, 2008-12-12)
This thesis was aimed at studying novel basic catalysts based on molecular sieves containing alkylammonium cations. The studied molecular sieves were faujasite zeolites (FAU) and mesoporous silicate (like MCM-41). The ...
Identification and quantification of the interaction mechanisms between the cationic surfactant HDTMA-Br and montmorillonite
(Clay Minerals Society, 2013-04)
Using a montmorillonite and the cationic surfactant hexadecyltrimethylammonium bromide (HDTMABr), a series of organoclays were synthesized with progressively increasing surfactant loads of between 0.2 and 4.0 times the ...
The intercalation of n-alkyldiamines into crystalline layered titanate
(Pergamon-elsevier Science LtdOxfordInglaterra, 2000)
Facile modification of montmorillonite by intercalation and grafting: The study of the binding mechanisms of a quaternary alkylammonium surfactant
(Elsevier Science, 2020-09)
Modified clays are among the most investigated organic-inorganic hybrid materials. Traditionally, they are prepared via reaction of the clay mineral with an organic substrate that can be bonded by cation exchange or by ...
Alkylammonium Alpo-kanemite As Support For Tuning Catalytic Activity Of Metallocene: In Situ Preparation Of Polyethylene Nanocomposites
(Elsevier Science BVAmsterdam, 2016)
Propriedades de zeólitas x formadas por partículas micro- e nanométricas contendo cátions alquilamônio lineares
(Universidade Federal de São CarlosUFSCarPrograma de Pós-Graduação em Engenharia Química - PPGEQCâmpus São Carlos, 2016-02-15)
Nanosized NaX zeolites (FAU) (crystallite size = 16 nm; Si/Al ratio = 1,5) were
synthesized and modified through ion exchange with linear alkylammonium cations containing
from one to six carbons, with the intent to ...