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Showing papers by "Rolf Fricke published in 1990"


Journal ArticleDOI
TL;DR: The silicoaluminophosphate molecular sieve SAPO-31 has been synthesized and characterized by XRD, 27Al, 29Si, and 31P MASNMR, IR spectroscopy, electron microscopy, DTA-TGA, chemical analysis, and catalytic conversion of methanol to light olefins.
Abstract: The silicoaluminophosphate molecular sieve SAPO-31 has been synthesized and characterized by XRD, 27Al, 29Si, and 31P MASNMR, IR spectroscopy, electron microscopy, DTA-TGA, chemical analysis, and the catalytic conversion of methanol to light olefins. The results from XRD and NMR investigations show that hydration causes structural changes of the framework.

46 citations


Patent
05 Jul 1990
TL;DR: In this article, an economically and ecologically advantageous process for the production of an aluminophosphate molecular sieve or its Si-containing modification which has a defined structure and pore orifices and whose diameter is at least 0.8mm is presented.
Abstract: 2.1 Molecular sieves which belong to the aluminosilicates of the zeolite type have long been known. They are distinguished by the fact that their structure consists of AlO2- and SiO2 tetrahedra whose sequence in the lattice leads to a characteristic pore structure. These and other properties give some of these solids outstanding properties in catalytic conversions and in material separation processes. However, the disadvantage of the molecular sieve types known to date is that their pore openings are between about 2.1 and 7.4 ANGSTROM and they are therefore incapable of adsorbing molecules having effective cross-sections which are greater than these pore sizes. It is intended to develop an economically and ecologically advantageous process for the production of an aluminophosphate molecular sieve or its Si- containing modification which has a defined structure and pore orifices and whose diameter is at least 0.8mm. 2.2 The process is characterised in that the gel-like reaction mixture or components thereof is or are cooled to temperatures below 20 DEG C for a period of 15 minutes to 24 hours before it is subjected to hydrothermal crystallisation in a pressure vessel. 2.3 Preferred use of the molecular sieve as a catalyst, as a catalyst component, as a selective adsorbent or as a sensor matrix.

4 citations


Journal ArticleDOI
TL;DR: The silicoaluminophosphate molecular sieve SAPO-31 has been synthesized and characterized by XRD, 27Al, 29Si, and 31P MASNMR, IR spectroscopy, electron microscopy, DTA-TGA, chemical analysis, and catalytic conversion of methanol to light olefins as discussed by the authors.
Abstract: The silicoaluminophosphate molecular sieve SAPO-31 has been synthesized and characterized by XRD, 27Al, 29Si, and 31P MASNMR, IR spectroscopy, electron microscopy, DTA-TGA, chemical analysis, and the catalytic conversion of methanol to light olefins. The results from XRD and NMR investigations show that hydration causes structural changes of the framework.

Patent
05 Jul 1990
TL;DR: In this article, anorganisches Syntheseverfahren zur Herstellung eines weitporigen Alumophosphat-Molekularsiebes bzw.
Abstract: 2.1 Molekularsiebe, die zum zeolithischen Typ der Alumosilikate gehoren, sind bereits seit langem bekannt. Sie zeichnen sich dadurch aus, das ihre Struktur aus A102-- und Si02-Tetraedern aufgebaut ist, deren Abfolge im Gitter zu einer charakteristischen Porenstruktur fuhrt. 2.2 Es soll ein okonomisch und okologisch vorteilhaftes Verfahren insbesondere ein templatfreies bzw. rein anorganisches Syntheseverfahren zur Herstellung eines weitporigen Alumophosphat-Molekularsiebes bzw. seiner Si-enthaltenden Modifikation mit definierter Struktur entwickelt werden. Das kristalline Alumophosphat-Molekularsieb mit mikroporoser Hohlraumstruktur, dessen Poreneingangssoffnungen groser oder gleich 0,8 nm sind, das mindestens aus AlO2 -- und P02 -Tetraederbausteinen besteht und das aus einem gelartigen Reaktionsgemisch, bestehend aus einer Aluminiumverbindung, einer Phosphorverbindung, Wasser und gegebenenfalls Kristallisationskeimen durch Kristallisation hergestellt ist, ist dadurch gekennzeichnet, das eine -P-O-P-Baugruppen enthaltende Phosphorverbindung zur Herstellung des gelartigen Reaktionsgemisches verwendet wird und das fertige Gemisch hydrothermal 2 - 150 Stunden bei Temperaturen von 95 °C bis 300 °C behandelt wird. 2.3 Verwendung des Alumophosphat-Molekularsiebes als Katalysatorkomponente, als selektives Adsorbens oder als Sensormatrix.