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Synthesis of Smectites and Porous Pillared Clay Catalysts: A Review
This paper reviews the synthesis of smectites and porous pillared clay catalysts. Synthetic as well as natural smectites serve as precursors for the synthesis of Al, Zr, Ti, Fe, Cr, Ga, V, Si, andExpand
Synthesis of Smectite Clay Minerals: A Critical Review
Smectites are one of the most important groups of phyllosilicates found in soils and sediments, and certainly one of the most difficult to study. New information about the formation mechanisms,Expand
Characterization of Synthetic Na-Beidellite
Na-beidellite, a member of the smectite group, was grown hydrothermally from a gel of composition 0.35Na2O·2.35Al2O3·7.3SiO2 in NaOH solutions at a pH between 7.5 and 13.5, a pressure of 1 kbar, andExpand
Low temperature synthesis and characterization of nesquehonite
Nesquehonite, Mg(HCO3)(OH).2H2O or MgCO3.3H2O, was named after its type locality in Nesquehoning, Pennsylvania, USA. The structure of nesquehonite can be envisaged as infinite chains of cornerExpand
XPS study of basic aluminum sulphate and basic aluminium nitrate
Basic aluminium sulphate and nitrate crystals were prepared by forced hydrolysis of aluminium salt solution followed by precipitation with a sulphate solution or by evaporation for the basicExpand
Homogeneous forced hydrolysis of aluminum through the thermal decomposition of urea.
Homogeneous hydrolysis of aluminum by decomposition of urea in solution was achieved because the urea coordinates to the Al3+ in solution, forming [Al(H2O)5 (urea)]3+ and to a lesser extent [Al(H2O)4Expand
Thermal stability of basic aluminum sulfate
The tridecameric aluminum polymer [AlO4Al12(OH)24(H2O)12]7+ is prepared by forced hydrolysis of an Al(NO3)3 solution by NaOH up to an OH:Al mol ratio of 2.2. Upon addition of sulfate the tridecamerExpand
Development of Ammonium-Saponites from Gels with Variable Ammonium Concentration and Water Content at Low Temperatures
Ammonium-saponite is hydrothermally grown at temperatures below 300°C from a gel with an overall composition corresponding to (NH4)0.6Mg3Si34Al0.6O10(OH)2. The synthetic saponite and coexisting fluidExpand
THE EFFECT OF THERMAL TREATMENT ON THE PROPERTIES OF HYDROXY-AL AND HYDROXY-GA PILLARED MONTMORILLONITE AND BEIDELLITE
A B S T R A C T : The pillaring process of montmorillonite and beidellite with A1 and Ga polymers has been studied using XRD, IR, 27A1, 71Ga, and 29Si MAS NMR, TGA, TEM, N2 adsorption and chemicalExpand
Synthesis and characterization of saponite clays
Abstract A new procedure has been developed for fast preparation of saponite clays under non-hydrothermal synthesis conditions of 90 °C and 1 atmosphere. Saponites were synthesized from aExpand
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