SMALL CRYSTAL FERRIERITE AND METHOD OF MAKING THE SAME Russian patent published in 2017 - IPC C01B39/44 B01J29/70 

FIELD: chemistry.

SUBSTANCE: method of producing a crystalline microporous material having a ferrierite-type framework is proposed. For the production, a reaction mixture containing silica and alumina is used, the silica to alumina molar ratio (SAR) varying from 10 to 60. The average crystal size of the resulting material is 200 nm or less. The method includes the stage of forming the mixture for the synthesis containing a source of silica, a source of alumina, a source of alkali metal, and organic structure-forming agents. In the reaction mixture, the first organic structure-forming agent (OSDA-1) containing tetramethylammonium cation and the second organic structure-forming agent (OSDA-2), which stimulates the formation of ferrierite structure, are used. OSDA-2 includes pyrrolidine, ethylenediamine, 1,3-diaminopropane, 1-methylpyrrolidine, piperidine, pyridine, and 1,4-diaminobutane. The molar ratio of OSDA-1 to OSDA-2 is from 0.2 to 1.0.

EFFECT: material is characterized by high specific surface and volume of micropores, has a high catalytic activity.

15 cl, 22 dwg, 11 ex