Ionite

THE MODIFICATED BY THE DYE POLIMERIC IONITES IN THE HYBRID SPECTROSCOPIC METHODS OF ANALYSIS... 

Metallic nitrates, supported on clays, have been used for nitrations and oxidations. Recent interesting studies involve nitration of 4-hydroxybenzaldehyde with Fe nitrate and KIO montmori I Ionite, in which nuclear nitration was preferentially realized and practically no oxidation of the aldehyde occurred. Even more interesting, simple addition of Fe nitrate to dealuminated or natural clay gave comparable or even better results. A 100% yield was realized at 60 °C with toluene as the solvent (Bekassy et al., 1998). 

The aluminosilicates examined were chosen as end members of those groups of phyl losil icates that commonly occur in soils muscovite and biotite mica, Fithian and Morris illite, Montana vermicul ite, montmoril Ionites from Upton (Wyoming bentonite), Camp Berteau, Redhill and New Mexico, and kaolinites from St. Austell, England, and Georgia, U.S.A. 

If mica-type sites are truly indicative of mica surfaces, and so on for montmoril Ionite etc., then of the clays examined, only the mica could be regarded as pure. The Montana vermiculite contained much montmoril Ionite, the Fithian illite contained mica and montmoril Ionite, the Wyoming bentonite contained some mica,... 

Table 4. Chemical composition o/ the crushed / ionite used os shining inoierial for e.xperimrntal run (IRA, 4...

Scheme 6.10 Montmoril Ionite I<10—Fe (111) as reusable catalyst for the quantitative acylation of anisole by p-nitrobenzoyl chloride.

Ionite layer. It is likely that the stability of the A1 interlayers (and Mg, Fe, etc.) and the reaction of the various molar ratios are to a large extent controlled by the charge and a, b dimensions of the 2 1 template. 

Ionite (given the specific name tosudite). Chemical analyses are given in Table L. All of the samples described have some impurities. This, coupled with the inability to properly proportion the octahedral sheets, makes the calculated structural formula of little value. By attempting to balance the layer charges the following compositions have been calculated for the tetrahedral sheets ... 

K. M. Saldadze and V. D. Kopylova-Valova, Complex Forming Ionites, Khimiya, Moscow, 1980. (Russian)... 

A. I. Voljinsky and V. A. Konstantinov, Regeneration of Ionites, Khimiya, Leningrad, 1990. (Russian)... 

N. I. Nikolaev, Ed., Diffusiorud Process in Ionites, NllTEHIM, Moscow, 1973. (Russian)... 

Finely dispersed clay minerals are present in soils and sediments as well as in my Ionites of crystalline rocks. Thus these materials make up some of the colloids found in the waters draining from these areas. Montmorillonite and illite are relatively abundant. 

Chromia pillared and pillared-delaminated clays have been synthesized from different montmori I Ionites and characterized by a variety of methods. Chromia-sulfide pillared materials show a high activity and selectivity in thiophene HDS and the consecutive hydrogenation of butene. The use of different clays as starting materials for the preparation of Cr-PILC enables control of their textural properties and chromium loading and thus to tailor the activity of these catalysts. 

Ionite muscovite natural, green and ruby, flat KNO3, io- -io- ... 

The cracking of petrochemical products is probably the most common dealkylation reaction. Silica-alumina, silica-magnesia, and a clay (monimoril-Ionite) are common dealkylation catalysts. 

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