NOTE
Effects of Organic Solvents in the Intercalation of Octylamine into H-magadiite Biddy ( 5 ) . Materials used were silica gel ( Wakogel Q-63 ) and analytical reagent grades of NaOH and Na 2 CO 3 . The reaction was carried out at
The intercalation of octylamine into H-magadiite was investi-150ΠC for 72 h in a stainless steel autoclave under autogenous pressure gated in n -hexane, hexadecane, 2,2,4-TMP, and mesitylene at without stirring using molar ratios of SiO 2 :NaOH:Na 2 CO 3 :H 2 O Γ
room temperature. Equilibrium of uptake is reached after 48 hr 15:1:2:300. The reaction product was separated from the mother liquid for all solvents. Uptake increased with increased of concentraby filtration, washed with deionized water, and then dried in air at 40ΠC. tion of octylamine and also exhibited the influence of the specific H-magadiite was prepared by titration of Na-magadiite with 0.1 N HCl solvent used. The basal spacings of organic solvent / octylammby the method of Lagaly et al. ( 13 ) . A suspension of 40 g of Na- onium-magadiite gels were shown to increase by 2 -8 A Λcommagadiite per 500 ml of deionized water was stirred for 1 hr. The suspen- pared with those of octylammonium magadiite gel prepared sion was then titrated with 0.1 N HCl to a final pH of 2.0, and then with no solvent. The results suggest that gallery height can be maintained at the same value for additional 24 h. The H-magadiite was affected by the solvation of intercalated octylamine as well recovered by filtering, washed with deionized water until Cl-free, and then dried in air at 40ΠC. as by the steric effect of solvated molecules.