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Síntesis de MOF en escala de kilogramo verde y evolución estructural inducida por acetona para el tamiz de benceno a
Zhi-Jie Jiang1, Ying Wang1, Weigang Lu1
1College of Chemistry and Materials Science, Guangdong Provincial Key Laboratory of Supramolecular Coordination Chemistry, Jinan University, Guangzhou 510632, China.
Journal of the American Chemical Society
|August 13, 2025
Resumen
Un nuevo marco metal-orgánico, JNU-81-C, separa eficientemente las mezclas de benceno y ciclohexano. Este material permite la recuperación de ciclohexano de ultra alta pureza mediante un proceso de adsorción energéticamente eficiente.
Área de la Ciencia:
- Ciencias de los materiales
- Ingeniería Química
- Ciencia de la separación
Sus antecedentes:
- Las mezclas de benceno y ciclohexano plantean desafíos de separación en los productos petroquímicos debido a la formación de azeótropos.
- La destilación convencional es ineficaz para separar el benceno y el ciclohexano.
- El desarrollo de métodos de separación eficientes y ahorradores de energía es fundamental para la industria.
Objetivo del estudio:
- Para sintetizar un nuevo marco metal-orgánico (MOF) capaz de separar el benceno y el ciclohexano.
- Investigar la evolución estructural del MOF bajo diferentes condiciones.
- Evaluar el rendimiento del MOF en la separación de benceno/ciclohexano.
Principales métodos:
- Síntesis por lotes de kilogramo de JNU-81-A en agua/etanol a temperatura ambiente
- Evolución estructural de un solo cristal a un solo cristal a JNU-81-B y JNU-81-C provocada por la acetona.
- Caracterización de la estructura de JNU-81-C y la flexibilidad de apertura de la puerta inducida por el benceno.
- Experimentos de perforación y extracción de la columna de fase líquida para la evaluación del rendimiento de la separación.
Principales resultados:
- Fácil síntesis de JNU-81-A y su transformación estructural en JNU-81-C.
- JNU-81-C exhibe un mecanismo de apertura de puerta inducido por benceno para la adsorción selectiva.
- Ciclohexano de ultraalta pureza (99,9%) obtenido a partir de mezclas de benceno y ciclohexano mediante el uso de JNU-81-C.
- Eficiencia y tasa de recuperación demostradas en la extracción en fase líquida a gran escala.
Conclusiones:
- JNU-81-C ofrece una alternativa prometedora y energéticamente eficiente basada en la adsorción para la separación de benceno/ciclohexano.
- La estructura ajustable del MOF y las propiedades de apertura de puertas son clave para sus capacidades de separación.
- Este trabajo proporciona una solución viable para un difícil proceso de separación industrial.
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