C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
23/186
C01B 33/26 (2006.01) B01D 71/02 (2006.01) C02F 1/28 (2006.01) C04B 35/622 (2006.01)
Patent
CA 1135938
ABSTRACT SYNTHETIC IMOGOLITE An inorganic material skin to imogolite is synthesised. Imogolite is a natural product having tubular structure and occurs in some soils. The synthetic product has tubes of 13-17% greater diameter, and is made by preparing an aqueous hydroxyaluminium silicate solution containing up to 0.5 molar aluminium and of pH 3.1 to 5.0 by acid-hydrolysing aluminium alkoxides and (introduced not earlier than the alkoxide) tetraalkyl silicate. The atomic proportion of Si: Al is up to 0.6:1. The solution thus prepared is digested, say at 96°C for a day, until a product is obtained displaying discernible electron diffraction peaks at 1.4.ANG., 2.1.ANG. and 4.2.ANG.. The synthesised imogolite finds use as a molecular sieve, a catalytic material, or a gel former or sorbent.
331091
Gowling Lafleur Henderson Llp
National Research Development Corporation
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