Metal-substituted a-type zeolite and its manufacture

Abstract

Abstract PURPOSE: To manufacture inorg. powder usable as an additive for improving the physical properties of various kinds of org. substances, a filler or a catalyst by substituting divalent metallic ions for part of the Na of sodium A-type zeolite. CONSTITUTION: An aqueous soln. of sodium silicate is mixed with an aqueous soln. of sodium aluminate in 0.5W3mol ratio of SiO 2 /Al 2 O 3 without causing back mixing, and the resulting amorphous aluminosilicic acid gel is aged to form sodium A-type zeolite crystals. The crystals are separated by filtration, washed in water, dispersed in water again, and brought into contact with an aqueous soln. of salt of Mg, Ca, Ba, Sr or other divalent metal having >5pH to substitute metallic ions for part of the Na ions. Thus, metal-substituted A type zeolite powder contg. residual Na ions by ≤10% as Na 2 O is manufactured. This powder has a uniform particle size distribution in which ≤6μm particle size occupies ≥80%. COPYRIGHT: (C)1982,JPO&Japio

Inventors

• 👤 Hiroyuki Kashiwase
• 👤 Shozo Takatsu
• 👤 Muneo Mita
• 👤 Genichi Sato
• 👤 Toshihiko Morishita
• 👤 Yutaka Konose

Bibliographic Details