METHOD OF PRODUCTION OF SYNTHETIC ZEOLITE OF TYPE Y Russian patent published in 2002 - IPC

FIELD: inorganic chemistry, sorbents. SUBSTANCE: invention relates to production of granulated synthetic zeolite of type Y no containing a binding substance. Natural clay mineral kaolin as the parent material taken in the amount 70-85% of kaolin total mass is subjected for calcination at 700-900 C and treated with sulfuric acid. Insoluble precipitate containing silicon dioxide is washed out with water, mixed with kaolin remained part to provide the final ratio SiO₂ : Al₂O₃ = (10-12):1 and carbon-containing addition (activated carbon, polyethylene, polypropylene or polystyrene). Water is added to a mixture to form the homogeneous plastic mass and the latter is formed to make granules. Then thermal activation, cooling and crystallization are carried out. The prepared adsorbent can be used in chemical and petroleum chemical industry as a catalyst. EFFECT: high adsorption and strength indices of zeolite. 1 tbl, 4 ex