Synthesis of zeolite with the CHA crystal structure, synthesis process and use thereof for catalytic applications
AssigneesConsejo Superioer de Investigaciones Cientificas, Universitat Politècnica de València
InventorsAvelino Corma Canós, Manuel Moliner Marín, Nuria Martín García
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Abstract
Disclosed is a synthesis process of a crystalline material with the CHA structure, which comprises the following steps: i) Preparation of a mixture that comprises one source of water, one source of a tetravalent element Y, one source of an alkaline or alkaline earth cation (A), one source of a trivalent element X, and one organic molecule (OSDA1) with the structure [R1R2R3R4N+]Q−, being the molar composition: nX2O3:YO2:aA:mOSDA1:zH2O, ii) crystallisation of the mixture obtained in i) in a reactor, iii) recovery of the crystalline material obtained in ii).
Claims25
A crystalline material with the CHA zeolite structure made by a process comprising, at least, the following steps:
- i) Preparation of a mixture that comprises at least one source of water, at least one source of a tetravalent element Y, at least one source of an alkaline or alkaline earth cation A, at least one source of a trivalent element X, and at least one organic molecule (OSDA1) with the structure [R1R2R3R4N+]Q−,
- wherein R1, R2, R3 and R4 are selected from linear alkyl groups, and wherein R1, R2, R3 and R4 each have between 1 and 4 carbon atoms, but at least two of them must have at least two carbon atoms, and wherein Q− is an anion, being the molar composition:
- nX2O3:YO2:aA:mOSDA1:zH2O
- wherein
- n ranges between 0.01 and 0.1;
- a ranges between 0 and 0.8;
- m ranges between 0.1 and 0.6;
- z ranges between 2 and 20;
- ii) Crystallization of the mixture obtained in i) in a reactor, and
- iii) Recovery of the crystalline material obtained in ii).
Dependencies are inferred from the claim text.