Manufacture of zeolites

Details Manufacture of zeolites Manufacture of zeolites

B - Operations, Transporting

01

J

252/2.A

B01J 29/06 (2006.01) C01B 39/40 (2006.01)

Patent

CA 1166620

MANUFACTURE OF ZEOLITES ABSTRACT OF THE DISCLOSURE A crystalline zeolite of the ZSM family is prepared by acid-leaching a calcined clay mineral at a temperature and for a time sufficient to extract at least part of the aluminium oxide content of said calcined clay mineral and increase the molar ratio or SiO2:Al2O3 in the calcined clay mineral, washing the acid-leached product with water; mixing the washed product with water and a quaternary compound or with water and a mixture of a quaternary compound and an alkali metal compound, at least a major proportion of the quaternary compound or of the quaternary compound and the alkali metal compound being a hydroxide, in the proportions required to form a zeolite of the ZSM family; heating the mixture thus formed at an elevated pressure and at an elevated temperature for a time sufficient to form a crystalline zeolite, and separating the crystalline zeolite from the reaction mixture in which it is formed. The temperature at which the method is carried out is not greater than 200°C. -1-

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