INORGANIC SOLIDS MIXTURE
The present invention relates to mixtures comprising at least a first population P1 of inorganic solids of volume-average diameter VAD1 and a second population P2 of inorganic solids of volume-average diameter VAD2, the VAD2/VAD1 ratio of which is of between 0.10 and 0.60, limits included. The present invention also relates to the use of said mixtures for catalytic reactions or separating or drying operations on gases and/or liquids.
1 . Mixture comprising at least a first population P1 of inorganic solids of volume-average diameter VAD1 and a second population P2 of inorganic solids of volume-average diameter VAD2, the VAD2/VAD1 ratio of which is of between 0.10 and 0.60, limits included, preferably between 0.15 and 0.55, limits included, advantageously between 0.20 and 0.50, limits included, and more particularly between 0.25 and 0.50, limits included.
2 . Mixture according to claim 1 , in which the inorganic solids of the population P1 exhibit a volume-average diameter VAD1 of between 0.4 mm and 5 mm, preferably between 0.4 mm and 2.5 mm, more preferably between 0.4 mm and 1 mm and very particularly preferably between 0.4 mm and 0.8 mm, limits included.
3 . Mixture according to claim 1 or claim 2 , in which the VADm/VAD1 ratio is greater than 0.85, preferably greater than 0.88 and more preferably greater than 0.90, where VADm represents the volume-average diameter of said mixture.
4 . Mixture according to any one of the preceding claims , in which the amount of inorganic solids of the second population P2 represents up to 25%, preferably up to 15%, for example from 0.5% to 25%, better from 1% to 15%, by weight, limits included, with respect to the combined P1+P2 inorganic solids.
5 . Mixture according to any one of the preceding claims , in which the volume-average diameter of the inorganic solids of the population P2 is less than 2 mm, preferably less than 1 mm, more preferably less than 0.5 mm, more particularly less than 0.4 mm and typically less than 0.3 mm.
6 . Mixture according to any one of the preceding claims , in which the volume-average diameter of the inorganic solids of the population P2 is greater than 0.05 mm and more preferably greater than 0.1 mm.
7 . Mixture according to any one of the preceding claims , in which the inorganic solids are chosen from adsorbents, and catalysts, and more particularly from zeolite agglomerates, also called molecular sieves, and solid catalysts, whether in the form of powders, crushed materials, extrudates, spun yarns, moulded bodies or any other form.
8 . Mixture according to any one of the preceding claims , in which the inorganic solids are agglomerates of crystals of zeolites, said zeolites being chosen from zeolites of LTA type, preferably 3A, 4A and 5A zeolites, zeolites of FAU type, preferably of X, LSX, MSX or Y type, zeolites of MFI type, preferably of ZSM-5 type and silicalites, zeolites P, zeolites of SOD type, zeolites of MOR type, zeolites of CHA type, zeolites of HEU type, and also homologues having hierarchical porosity, and mixtures of two or more of them in all proportions.
9 . Mixture according to any one of the preceding claims , chosen from mixtures of at least a first population P1 of zeolite agglomerates and of at least a second population P2 of zeolite agglomerates, where the zeolite agglomerates are identical or different and are chosen from agglomerates of zeolites LTA (such as 3A, 4A or 5A), X, LSX, MSX and Y.
10 . Use of a mixture according to any one of the preceding claims , in static mode or in dynamic mode, for separations of gases and/or of liquids, for drying operations on gases and/or on liquids, separations of organic molecules, in the gas and/or liquid phase, catalytic reactions in the gas and/or liquid phase, and others.