Method for the direct synthesis of Cu-containing silicoaluminate material with the AEI zeolite structure, and the catalytic applications thereof
AssigneesConsejo Superior de Investigaciones Cientificas, Universitat Politècnica de València
InventorsAvelino Corma Canós, Manuel Moliner Marín, Nuria Martín García
Life of this patent
Estimating the term…
Abstract
The present invention provides a new method for preparing the copper-containing silicoaluminate form of the AEI zeolite structure by means of a direct synthesis methodology. This new process involves combining a organometallic copper-complex with an additional organic molecule capable of directing the crystallization of the silicoaluminate form of the AEI zeolite structure as organic structure-directing agents (OSDAs).
Claims37
Process for the direct synthesis of a material with the copper-containing silicoaluminate form of the AEI zeolite structure, which comprises, at least, the following steps:
- (i) preparation of a mixture containing, at least,
- one source of water,
- one source of copper,
- one polyamine,
- one source of tetravalent element Y, one source of trivalent element X,
- one cyclic ammonium cation with alkyl substituents as the OSDA and
- one source of alkaline or alkaline-earth cations (A), where the synthesis mixture has the following molar composition:
- YO2:aX2O3:bOSDA:cA:dH2O:eCu:f Polyamine
- where
- a ranges between 0.001 and 0.2;
- b ranges between 0.01 and 2;
- c ranges between 0 and 2;
- d ranges between 1 and 200;
- e ranges between 0.001 and 1;
- and
- f ranges between 0.001 and 1;
- (ii) crystallisation of the mixture obtained in (i) in a reactor;
- and
- (iii) recovery of the crystalline material obtained in (ii).
Process for the direct synthesis of a material with the copper-containing silicoaluminate form of the AEI zeolite structure, which comprises, at least, the following steps:
- (i) Preparation of a mixture containing, at least,
- one source of water,
- one source of copper,
- one polyamine, selected from tetraethylenepentamine, triethylenetetramine, 1,4,8,11-tetraazacyclotetradecane, 1,4,8,11-tetramethyl-1,4,8,11-tetraazacyclotetradecane, or mixtures thereof,
- one source of tetravalent element Y, which is Si, and one source of trivalent element X, which is Al, wherein a zeolite with the FAU structure is the only source of Y and X,
- one cyclic ammonium cation with alkyl substituents as the OSDA, selected from N,N-dimethyl-3,5-dimethylpiperidinium (DMDMP), N,N-diethyl-2,6-dimethylpiperidinium (DEDMP), N,N-dimethyl-2,6-dimethylpiperidinium, N-ethyl-N-methyl-2,6-dimethylpiperidinium and combinations thereof and
- one source of alkaline or alkaline-earth cations (A), selected from a source of Na, K, and combinations thereof, where the synthesis mixture has the following molar composition:
- YO2:aX2O3:bOSDA:cA:dH2O:eCu:f Polyamine
- where
- a ranges between 0.001 and 0.2;
- b ranges between 0.01 and 2;
- c ranges between 0.01 and 0.8;
- d ranges between 1 and 200;
- e ranges between 0.001 and 1;
- f ranges between 0.001 and 1;
- and wherein the molar ratio of A:YO2 is at least 0.1,
- wherein the mixture formed in (i) is free from any source of phosphorous,
- wherein the mixture formed in (i) is free from any source of fluorine,
- (ii) Crystallisation of the mixture obtained in (i) in a reactor,
- (iii) Recovery of the crystalline material obtained in (ii).
Dependencies are inferred from the claim text.