Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group iib metal
Patent
1997-11-03
1999-01-26
Bell, Mark L.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group iib metal
423716, 423DIG21, 423DIG22, 423DIG24, 423DIG32, C01B 3920, C01B 3916, C01B 3936, C01B 3952
Patent
active
058635165
ABSTRACT:
The present invention relates to colloidal suspensions of discrete particles of colloidal zeolite and a method for preparing such zeolite from clear tetraalkylammonium stabilized aluminiumsilicate solutions. Smaller amounts of well defined and controlled metal hydroxide solutions are added to these alumiumsilicate solutions to enable the synthesis of a specific zeolite as well as to control zeolite yield. The colloidal suspensions are characterized by an average particle size of less than 250 nanometers and preferably, less than 200 nanometers together with the fact that the particle size distribution expressed as the geometric standard deviation is less than 1.30 and preferably less than 1.20. Zeolite sols synthesized according to this invention display Tyndall light scattering typical for colloidal suspensions as well as a very low rate of sedimentation due to the small particle size. Zeolite sols synthesized according to this invention can be prepared so as to contain negligable amounts of amorphous material.
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Otterstedt Jan-Erik
Schoeman Brian J.
Sterte Per Johan
Bell Mark L.
Exxon Chemical Patent Inc.
Sample David
Sherer Edward F.
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