摘要:
The invention relates to a method for separating xylenes by means of a simulated mobile bed using an agglomerated zeolitic adsorbent solid, preferably based on faujasite zeolite with a Si/Al ratio of between 1 and 6, said solid being used in the form of particles having a diameter of between 150 μm et 500 μm.
摘要:
The present invention relates to a zeolitic granular material having a connected zeolitic structure across the entire volume thereof, having high mechanical resistance to crushing in the bed, and optimised material transfer in the macro-mesopores. The invention also relates to the method for preparing said zeolitic granular material, as well as to the use thereof as an adsorbent material in co-current or counter-current liquid phase separation methods, typically in a simulated mobile bed.
摘要:
The present invention relates to zeolitic adsorbents based on agglomerated crystals of FAU zeolite comprising barium and/or potassium, with a large external surface area, combining optimum properties in terms of selectivity and mechanical strength. These adsorbents find applications in the separation of fractions of C8-aromatic isomers and in particular of xylenes, in the separation of isomers of substituted toluene such as nitrotoluene, diethyltoluene or toluenediamine, and in the separation of cresols, and polyhydric alcohols, such as sugars.
摘要:
The present invention concerns zeolite materials in the form of agglomerates comprising at least one mesoporous zeolite, Faujasite, having an Si/Al ratio strictly higher than 1.4 and having, at the same time, the characteristics of mesoporous zeolites, the properties associated with microporosity, and the mechanical properties of zeolite agglomerates without a mesoporous zeolite. The invention also concerns the method of preparing said zeolite materials in the form of agglomerates.
摘要:
The present invention concerns zeolite materials in the form of agglomerates comprising at least one mesoporous zeolite and having both the features of mesoporous zeolites, the properties linked to microporosity and the mechanical properties of zeolite agglomerates without a mesoporous zeolite. The invention also concerns the method for preparing said zeolite materials in the form of agglomerates.
摘要:
The present invention relates to spherical agglomerates based on zeolite(s) and clay(s), having controlled size and morphology, in particular a size of less than or equal to 600 µm, very good sphericity, and a high content of zeolitic material, and also to the process for the production thereof. These agglomerates are particularly suitable for uses in gas-phase and/or liquid-phase adsorption processes.
摘要:
The invention relates to zeolitic absorbents based on at least one zeolite with hierarchical porosity, containing barium or barium and potassium, to the uses thereof for separating para-xylene from aromatic fractions containing 8 carbon atoms, and to the method for separating para-xylene from aromatic fractions containing 8 carbon atoms.
摘要:
The present invention relates to a zeolite absorbent comprising at least one FAU zeolite with hierarchical porosity and comprising barium or barium and potassium, and the external surface area of which is greater than 20 m 2 .g -1 , and the non-zeolite phase content being between 6% and 12% by weight with respect to the total weight of the absorbent. The present invention also relates to the use of such a zeolite absorbent as an adsorption agent, as well as the method for separation of para -xylene from aromatic isomer fractions with 8 carbon atoms.
摘要:
The invention relates to a method for separating meta -xylene from C8 aromatic fractions, using a zeolitic adsorbent based on sodium-exchanged or sodium-and-lithium-exchanged agglomerated crystals of zeolite Y, with a large external surface area.