Electric Literature of 1941-30-6, In heterogeneous catalysis, the catalyst is in a different phase from the reactants. At least one of the reactants interacts with the solid surface in a physical process called adsorption in such a way. 1941-30-6, name is Tetrapropylammonium bromide. In an article£¬Which mentioned a new discovery about 1941-30-6
Synthesis of aluminophosphate and derived materials with the ZON structure-type
Materials with the ZON structure-type were synthesized between 120C and 180C from gels with the composition: v P2O5; w Al2O3; x SiO2; y MeO; a (CH3)4NCl; b HF; c (HOCH2CH2)2NH; 80H2O. Diethanolamine was used as a pH modifier without templating effects. The crystallization of AlPO4 materials needs the presence of F- anions which compensate the M(CH3)4N+ cationic template. The calcined AlPO4 is stable and adsorbs water but not n-hexane, the eight-membered ring of the framework aperture being probably too distorted. Pure SAPO materials could be obtained with silica by decreasing the amount of F- in the gel in order to allow the formation of negative framework charges by the Si ? P substitution. Nevertheless, sodalite-type SAPO is formed in the complete absence of F-. Co substituted easily for Al in the CoAPO-ZON, and the amount of F- necessary for the synthesis could be decreased to zero. No conditions were found for the preparation of a continuous series of materials with compositions between AlPO4 and the completely substituted CoAPO. The substitution of Al by Zn was more difficult and no MgAPO-ZON could be obtained. Materials with the ZON structure-type were synthesized between 120C and 180C from gels with the composition: upsilon P2O5; w A12O3; x SiO2; y MeO; a (CH3)4NC1; b HF; c (HOCH2CH2)2NH; 80H2O. Diethanolamine was used as a pH modifier without templating effects. The crystallization of A1PO4 materials needs the presence of F- anions which compensate the M(CH3)4N+ cationic template. The calcined A1PO4 is stable and adsorbs water but not n-hexane, the eight-membered ring of the framework aperture being probably too distorted. Pure SAPO materials could be obtained with silica by decreasing the amount of F- in the gel in order to allow the formation of negative framework charges by the Si ? P substitution. Nevertheless, sodalite-type SAPO is formed in the complete absence of F-. Co substituted easily for A1 in the CoAPO-ZON, and the amount of F- necessary for the synthesis could be decreased to zero. No conditions were found for the preparation of a continuous series of materials with compositions between A1PO4 and the completely substituted CoAPO. The substitution of A1 by Zn was more difficult and no MgAPO-ZON could be obtained. (C) 2000 Elsevier Science B.V. All rights reserved.
Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.1941-30-6. In my other articles, you can also check out more blogs about 1941-30-6
Reference£º
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI