Cyclodextrins incorporated in natural zeolitic materials of the clinoptilolite type

Combinations of natural and synthetic inclusion compounds and their thermal stability

“…The CT type of Slovak zeolitic material used in our papers [14-19, 34, 35, 46, 47] is capable to exchange the M(I) or M(II) metals in its cationic part by other cations, sometimes as included in intrazeolitic way [15,30,31]. It is capable to exchange the original guest (water) for various organic or inorganic compounds [16].…”

“…The individual modified forms of cyclodextrins are also sensible to the presence of individual metals [12,15,18,75]. Even more when the cyclodextrins were combined with montmorillonites [5,6], clinoptilolitic or other natural [15,18,30] or synthetic [72] zeolites.…”

“…Therefore it is known, that it sorbs different organic compounds as guests. Some of them are inserted in the interlayers on the basis of a cation ex- Time/d For the amelioration of the sorption in clays the Ca(II), Cu(II) or otherwise exchanged minerals from the original Na(I) form [6,14,15,63,64] are often used. In the case of the alkylammonium exchanged montmorillonites the thermal stability is decreasing with the increasing length of the alkyl chain.…”

“…Some aliquot of metals is not only substituting the cations present in the host of clays or mineral compounds [25][26][27][28][29]. But the ions or atoms [15,[25][26][27][28] are in structural way dispersed [30 -32], sometimes whole halides [16,[32][33][34] are enclosed in the host layer.…”

“…The results of Kijima syntheses [5,6] depended -equally as later and also in the case of other products in our laboratories [14][15][16][17][18][19] -upon the cationic form of the mineral host.…”