caa a22 4500 475844661 CHVBK 20180406123910.0 cr unu---uuuuu 170329e20000301xx s 000 0 eng 10.1023/A:1019107916156 doi (NATIONALLICENCE)springer-10.1023/A:1019107916156 A study of the influence of the synthesis conditions upon the catalytic properties of silicoaluminophosphate molecular sieves [Elektronische Daten] [C.M. López, F.J. Machado, B. Méndez, M. Pinto, V. Sazo, J. Goldwasser, M.M. Ramírez] The skeletal isomerization of 1‐butene was performed over a series of silicoaluminophosphate molecular sieves with AEL structure (SAPO‐11). The results were compared with those obtained over an aluminophosphate molecular sieve (AlPO4‐11). The three SAPO‐11 samples, with different acidic properties, were synthesized by either varying the chemical composition of the synthesis gel or by varying the preparation time of the aforementioned gel. The catalytic results indicate that irrespective of how the acidity of the SAPO‐11 samples is changed (viz., independently of the method elected to modify the acidic properties of the samples), a close parallelism between the selectivity towards the skeletal isomerization and the number of (moderate + strong) Brønsted acid sites (sites retaining pyridine above 623 K) was observed for the SAPO‐11 solids. These results, definitively, indicate the participation of these acid sites in the skeletal isomerization process. Kluwer Academic Publishers, 2000 1‐butene nationallicence silicoaluminophosphates nationallicence molecular sieves nationallicence skeletal isomerization nationallicence Brønsted acidity nationallicence López C.M. INTEVEP, SA, Apartado 76343, 1070‐A, Caracas, Venezuela aut Machado F.J. INTEVEP, SA, Apartado 76343, 1070‐A, Caracas, Venezuela aut Méndez B. INTEVEP, SA, Apartado 76343, 1070‐A, Caracas, Venezuela aut Pinto M. INTEVEP, SA, Apartado 76343, 1070‐A, Caracas, Venezuela aut Sazo V. INTEVEP, SA, Apartado 76343, 1070‐A, Caracas, Venezuela aut Goldwasser J. INTEVEP, SA, Apartado 76343, 1070‐A, Caracas, Venezuela aut Ramírez M.M. Centro de Catálisis, Petróleo y Petroquímica, Escuela de Química, Facultad de Ciencias, Universidad Central de Venezuela, Apartado Postal 47102, Los Chaguaramos, 1020‐A, Caracas, Venezuela aut Topics in Catalysis Kluwer Academic Publishers-Plenum Publishers 10/1-2(2000-03-01), 65-71 1022-5528 10:1-2<65 2000 10 11244 https://doi.org/10.1023/A:1019107916156 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1019107916156 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- López C.M. INTEVEP, SA, Apartado 76343, 1070‐A, Caracas, Venezuela aut NATIONALLICENCE 700 1- Machado F.J. INTEVEP, SA, Apartado 76343, 1070‐A, Caracas, Venezuela aut NATIONALLICENCE 700 1- Méndez B. INTEVEP, SA, Apartado 76343, 1070‐A, Caracas, Venezuela aut NATIONALLICENCE 700 1- Pinto M. INTEVEP, SA, Apartado 76343, 1070‐A, Caracas, Venezuela aut NATIONALLICENCE 700 1- Sazo V. INTEVEP, SA, Apartado 76343, 1070‐A, Caracas, Venezuela aut NATIONALLICENCE 700 1- Goldwasser J. INTEVEP, SA, Apartado 76343, 1070‐A, Caracas, Venezuela aut NATIONALLICENCE 700 1- Ramírez M.M. Centro de Catálisis, Petróleo y Petroquímica, Escuela de Química, Facultad de Ciencias, Universidad Central de Venezuela, Apartado Postal 47102, Los Chaguaramos, 1020‐A, Caracas, Venezuela aut NATIONALLICENCE 773 0- Topics in Catalysis Kluwer Academic Publishers-Plenum Publishers 10/1-2(2000-03-01), 65-71 1022-5528 10:1-2<65 2000 10 11244 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer