ZEOLITE Y Russian patent published in 2013 - IPC B01J29/08 C01B39/02 C01B39/24 B01J37/00 B01J20/18 

FIELD: chemistry.

SUBSTANCE: present invention relates to a modified zeolite Y and a method for production thereof. The invention describes a method of producing modified zeolite Y, involving calcination of zeolite Y, having molar ratio of silicon dioxide to aluminium oxide of at least 10, at temperature from 700 to 1000°C, wherein: (i) partial pressure of water vapour is at most 6 kPa (0.06 bar) at temperature from 700 to 800°C; (ii) partial pressure of water vapour is at most 8 kPa (0.08 bar) at temperature from 800 to 850°C; (iii) partial pressure of water vapour is at least 3 kPa (0.03 bar) at temperature from 850 to 900°C; and (iv) partial pressure of water vapour is at least 5 kPa (0.05 bar) at temperature from 900 to 950°C; and (v) partial pressure of water vapour is at least 7 kPa (0.07 bar) at temperature from 950 to 1000°C; modified zeolite Y obtained using said method; zeolite Y, having molar ratio of silicon dioxide to aluminium oxide of at least 10, the infrared spectrum of which has a peak at 3700 cm^-1, but essentially does not have peaks at 3605 and 3670 cm^-1; and zeolite Y, having molar ratio of silicon dioxide to aluminium oxide of at least 10, wherein said zeolite Y has acidity, measured by exchange with perdeuterated benzene, of at most 20 mcmol/g; a method of using zeolite Y as an adsorbent.

EFFECT: obtaining a zeolite having modified properties, enabling reduction of acidity of the zeolite, obtaining a zeolite with a defined infrared spectrum.

9 cl, 4 tbl, 2 ex