Compuestos relacionados con la diimida de silicio, método de obtención, y su aplicación en la preparación de un material poroso amorfo

Compuestos relacionados con la diimida de silicio, método de obtención, y su aplicación en la preparación de un material poroso amorfo. La presente invención se refiere a un compuesto de fórmula general: SixM1-xNyHz donde M se refiere al menos a un elemento del grupo formado por germanio, aluminio y galio; x está comprendido entre 0 y 0.5; y está comprendido entre 2 y 4; y z está comprendido entre 2 y 8; dicho compuesto conteniendo enlaces entre los átomos de silicio y átomos de nitrógeno y entre el elemento M y los átomos de nitrógeno. Asimismo, la presente invención se refiere a un método de obtención del compuesto mediante reacción de amonolisis con los compuestos precursores en líquido iónico y amoniaco gaseoso a una temperatura comprendida entre -15ºC y 200ºC. Otro objeto de la invención es el método de preparación de un material poroso amorfo a partir del compuesto descrito, así como el propio material y sus múltiples usosPeer reviewedConsejo Superior de Investigaciones CientíficasB1 Patente sin examen previ

Revalorización y difusión del patrimonio bibliográfico histórico-químico presente en las bibliotecas españolas

Presenta el proyecto cuyo objetivo es la puesta en valor de los fondos antiguos relevantes para el estudio de la historia de la química, que se encuentran en la Biblioteca Histórica “Marqués de Valdecilla” de la Universidad Complutense de Madrid, en las bibliotecas pertenecientes al Consejo Superior de Investigaciones Científicas y en la Biblioteca Nacional de España. El proyecto consiste en la elaboración de un catálogo razonado que incluya la totalidad de los títulos previamente identificados, los cuales abarcarían todos los aspectos de la química y temas estrechamente relacionados, proporcionando un enlace al texto completo y a la ficha bibliográfica. Todo ello conforma la “Biblioteca Histórica Química Virtual”, accesible a través de la web del Instituto de Catálisis y Petroleoquímica del CSIC. Particularmente significativa es la inclusión de obras escritas en español, tanto originales como traducidas, de gran importancia en la historia de la química española. A continuación se muestra una pequeña selección, centrada principalmente, aunque no de manera exclusiva, en las obras conservadas en la Biblioteca Histórica de la Univesidad Complutense

Zeolites and ordered porous solids: fundamentals and applications

Pérez Pariente, J.; Martínez Sánchez, MC. (2011). Zeolites and ordered porous solids: fundamentals and applications. Editorial Universitat Politècnica de València. http://hdl.handle.net/10251/11205Archivo delegad

Procedimiento de aplicación de sepiolitas básicas como catalizadores en reacciones de condensación de Knoevenagel

Referencia OEPM: P8904192.-- Fecha de solicitud: 12/12/1989.-- Titular: Consejo Superior de Investigaciones Científicas (CSIC).El procedimiento de invención se refiere a la aplicación de sepiolitas básicas como catalizadores en reacción de condensación de Knoevenagel. Las sepiolitas empleadas se obtienen mediante modificación de la sepiolita natural con iones alcalinos o alcalinotérreos. Estos catalizadores poseen una elevada área superficial y un elevado volumen de poro.Peer reviewe

Síntesis de zeolita beta

Referencia OEPM: P9501552.-- Fecha de solicitud: 01/08/1995.-- Titular: Universidad Politécnica de Valencia (UPV).En la presente invención se reivindica un nuevo método de síntesis de zeolita Beta, caracterizado porque en la preparación de la mezcla de síntesis se evita la presencia de cationes alcalinos. La zeolita Beta obtenida se caracteriza por su pequeño tamaño de cristal, su capacidad de formar suspensiones coloidales estables y porque su calcinación permite obtener la forma ácida sin recurrir a procesos de intercambio catiónico. Se reivindica también el uso del material obtenido en procesos catalíticos de transformación de hidrocarburos, para preparación de membranas zeolíticas y como activador de otras síntesis de zeolitas. El método consiste en el calentamiento a 363-473K de una mezcla de reacción que contiene una fuente de silicio, una fuente de aluminio, un catión orgánico director de estructura como hidróxido y agua, evitándose la presencia de cationes alcalinos. Se obtiene una suspensión coloidal de zeolita Beta de la que puede separarse la zeolita.Peer reviewe

Vectores energéticos químicos basados en carbono: Combustibles sintéticos y biocarburantes

Vectores energéticos químicos basados en carbono: Combustibles sintéticos y biocarburantes

Beyond Avelino's scientific achievements: The building process of a community in catalysis

[EN] The scientific career of Avelino has recently been reviewed in some detail [1] and the contributions included in this special issue provide additional valuable and extensive insights into several aspects of his activities from a variety of perspectives, written with the purpose of completing the picture of Avelino as the author of outstanding breakthroughs in zeolite science and catalysis. But, it is precisely his excellence in science that motivates some key questions that have never been properly addressed, not at least in printing form: how all these achievements came into being? What is the nature of the process that has made such wide range of innovations possible? How the material and human resources required for that successful process were gathered and organized? These questions are usually not of primary concern for scientific journals, as this one is, and are in general best regarded as more suitable for historically oriented publications, and even for social and philosophical aspects of the scientific research. However, we think that these questions are relevant to those scientists who are actively contributing to the fields that Avelino has explored so successfully over the years, as well as to all those who wish to understand through the study of Avelino's career how science is practiced and organized as a human activity.The authors are very grateful to Prof Vicente Fornes for providing us some invaluable information that has been included in this article. Unfortunately, Prof Fornes has refused to appear on the list of authors of this article. The authors also thank Dra. Julia Aguilar, who belonged to ITQ, for providing us with a copy of the picture included in Fig. 2. Also, the Generalitat Valenciana, Conselleria d'Innovacio, Universitats, Ciencia i Societat Digital is acknowledged for their funding via project Prometeo/2021/077.Miro, P.; Lázaro, J.; Pérez Pascual, M.; Frontela, J.; Rey Garcia, F.; Pérez Pariente, J. (2023). Beyond Avelino's scientific achievements: The building process of a community in catalysis. Microporous and Mesoporous Materials. 358. https://doi.org/10.1016/j.micromeso.2022.11240335

Template-controlled acidity and catalytic activity of ferrierite crystals

A synthesis strategy to tailor the acid sites location in ferrierite crystals has been developed. The zeolite catalysts were synthesised in fluoride medium using different combinations of organic structure directing agents (SDAs) in the absence of inorganic cations. Therefore, the negative charge associated to the incorporation of aluminium to the framework was compensated exclusively by the positive charge of the organic SDAs. In this way, Al sitting in the zeolite framework was driven by the specific location of the different SDA molecules within the zeolite void volume. Following this synthesis strategy, it has been found that the distribution of strongly acidic hydroxyl groups in the proton form of the zeolites obtained after removal of the organic templates was dependent on the combination of organic molecules used as SDAs. Moreover, the catalytic activity of the zeolites in m-xylene and 1-butene isomerisation increased as the relative population of strong Brönsted acid groups in sterically constrained sites inside the ferrierite cavity decreased.This work has been financially supported by the MICINN (project CTQ2006-06282).Peer reviewe

Immune signaling kinases in amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD)

Amyotrophic lateral sclerosis (ALS) is the most common neurodegenerative disorder of motor neurons in adults, with a median survival of 3–5 years after appearance of symptoms, and with no curative treatment currently available. Frontotemporal dementia (FTD) is also an adult-onset neurodegenerative disease, displaying not only clinical overlap with ALS, but also significant similarities at genetic and pathologic levels. Apart from the progressive loss of neurons and the accumulation of protein inclusions in certain cells and tissues, both disorders are characterized by chronic inflammation mediated by activated microglia and astrocytes, with an early and critical impact of neurodegeneration along the disease course. Despite the progress made in the last two decades in our knowledge around these disorders, the underlying molecular mechanisms of such non-cell autonomous neuronal loss still need to be clarified. In particular, immune signaling kinases are currently thought to have a key role in determining the neuroprotective or neurodegenerative nature of the central and peripheral immune states in health and disease. This review provides a comprehensive and updated view of the proposed mechanisms, therapeutic potential, and ongoing clinical trials of immune-related kinases that have been linked to ALS and/or FTD, by covering the more established TBK1, RIPK1/3, RACK I, and EPHA4 kinases, as well as other emerging players in ALS and FTD immune signaling.Ministerio de Economía y Competitividad RTI2018- 098432-B-I00, RYC-2017-23127Junta de Andalucía US-1265227, PY20_0109

A survey of parallel hybrid applications to the permutation flow shop scheduling problem and similar problems

Parallel algorithms have focused an increased interest due to advantages in computation time and quality of solutions when applied to industrial engineering problems. This communication is a survey and classification of works in the field of hybrid algorithms implemented in parallel and applied to combinatorial optimization problems similar to the to the permutation flowshop problem with the objective of minimizing the makespan, Fm|prmu|Cmax according to the Graham notation, the travelling salesman problem (TSP), the quadratic assignment problem (QAP) and, in general, those whose solution can be expressed as a permutation