ADSORPTION AND MICROCALORIMETRIC INVESTIGATIONS OF N-BUTYLAMINE INTERCALATION IN ALPHA-ZIRCONIUM AND GAMMA-ZIRCONIUM PHOSPHATES

The intercalation process of n-butylamine was investigated. The adsorp tion of n-butylamine in interlamellar space had stepwise character in case of both crystalline forms of zirconium phosphate. The intercalate d n-butylamine existed at low concentration as bilayered complex. The reaction heat was determined by a microcalorimetric method. It was fou nd that about 90% of it refers to the neutralization of n-butylamine a nd only about 10% is related with surface adsorption (ion exchange). T he steps of adsorption are 6.0 J/g add 1.0 J/g reaction heat values, r espectively. The enthalpy balance of total process in dilute solution system (c(0) = 3.0 vol%) is 14.67 kJ/mol. The calculated value for ion adsorption (exchange) was 1.37 kJ/mol.