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, selected from a source of Na, K and combinations thereof, where the synthesis mixture has the following molar composition: YO 2: a X 2 O 3: b OSDA: c A: d H 2 O: e Cu: 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; 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). (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, selected from a source of Na, K and combinations thereof, where the synthesis mixture has the following molar composition: YO 2: a X 2 O 3: b OSDA: c A: d H 2 O: e Cu: 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; 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, - 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, selected from a source of Na, K and combinations thereof, where the synthesis mixture has the following molar composition: YO 2: a X 2 O 3: b OSDA: c A: d H 2 O: e Cu: 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; 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).