Abstract:
La presente invención describe el empleo de catalizadores sólidos, obtenidos por calcinación de un cincato de un metal alcalinotérreo o de un metal de transición divalente, para la producción de biocarburantes (biodiésel) mediante transesterifícación en condiciones suaves de temperatura y presión atmosférica, de aceites o grasas vegetales o animales, con alcoholes de bajo peso molecular. Ventajas, además de las propias de la catálisis heterogénea: - Simplicidad, reproducibilidad y fácil escalado de la síntesis. - El precursor del catalizador activo es estable en aire. - La temperatura de descomposición o activación del catalizador es inferior a la de otros catalizadores sólidos básicos. - La cinética de la reacción es similar a la descrita en reacciones de catálisis homogénea, y significativamente más rápida que en el caso de otros catalizadores sólidos.
Abstract:
The present invention relates to the use of a silicon-based porous catalytic system for oligomerising light olefins said porous silicon-based catalytic system having an average pore diameter of between about 1 nm and about 5 nm and an acidity level of between about 150 µmol/g and about 650 µmol/g, and prepared from at least one hydrolysable silicon-based compound, or other source of silicon, and at least one non-ionic surface active agent.The invention also relates to a process for oligomerising light olefins using said silicon-based porous catalytic system, and to certain silicon-based porous catalytic systems.
Abstract:
The present invention relates to the use of a silicon-based porous catalytic system for oligomerising light olefins said porous silicon-based catalytic system having an average pore diameter of between about 1 nm and about 5 nm and an acidity level of between about 150 µmol/g and about 650 µmol/g, and prepared from at least one hydrolysable silicon-based compound, or other source of silicon, and at least one non-ionic surface active agent.The invention also relates to a process for oligomerising light olefins using said silicon-based porous catalytic system, and to certain silicon-based porous catalytic systems.
Abstract:
The present invention relates to the use of a silicon-based porous catalytic system for oligomerising light olefins said porous silicon-based catalytic system having an average pore diameter of between about 1 nm and about 5 nm and an acidity level of between about 150 µmol/g and about 650 µmol/g, and prepared from at least one hydrolysable silicon-based compound, or other source of silicon, and at least one non-ionic surface active agent.The invention also relates to a process for oligomerising light olefins using said silicon-based porous catalytic system, and to certain silicon-based porous catalytic systems.
Abstract:
Process of preparation of silicon-based multifunctional catalytic systems synthesised together with one or more surface active agents, 2) multifunctional silicon-based porous catalytic system comprising at least one porous catalytic support structurally comprising silica and at least one other metal or non-metal oxide chosen from aluminium, zirconium, and boron, said catalytic support being synthesised together with one or more surface active agents, and at least one or more catalyst chosen from among metallic elements of groups 6-10 of the periodic table of the elements, 3) the catalytic systems are useful in hydrogenation and/or decyclisation reactions of (poly)aromatic compounds, especially for improving the quality of diesel fuels and increasing their cetane number.
Abstract:
Process of preparation of silicon-based multifunctional catalytic systems synthesised together with one or more surface active agents, 2) multifunctional silicon-based porous catalytic system comprising at least one porous catalytic support structurally comprising silica and at least one other metal or non-metal oxide chosen from aluminium, zirconium, and boron, said catalytic support being synthesised together with one or more surface active agents, and at least one or more catalyst chosen from among metallic elements of groups 6-10 of the periodic table of the elements, 3) the catalytic systems are useful in hydrogenation and/or decyclisation reactions of (poly)aromatic compounds, especially for improving the quality of diesel fuels and increasing their cetane number.