Structure material of the zeolite type with ultralarge pores and

Details Structure material of the zeolite type with ultralarge pores and Structure material of the zeolite type with ultralarge pores and

1995-02-15

1998-07-21

Bell, Mark L.

Chemistry of inorganic compounds

Zeolite

Organic compound used to form zeolite

423702, 423703, 423704, 423705, 423706, C01B 3320, B01J 2904

Patent

active

057831670

ABSTRACT:
The invention relates to a material comprised of silicotitanates having a crystalline structure similar to MCM-41 zeolites, said material being characterized in that it contains in its lattice atoms of titanium and channels in its porous structure whose average sizes exceed 10 .ANG., making possible its utilization in catalytic reactions wherein are involved large organic molecules, such as the oxidation of olefins to epoxides and glycols, alcohols to cetones, thio-ethers to sulfoxides and sulfones, and phenol to catechol and hydroquinone, and if Al is introduced into the structure it is then possible to prepare bifunctional catalysts "oxidant-acid/base." In order to obtain such product, and aqueous solution is used which contains the ion NR.sub.1 N.sub.2 N.sub.3 N.sub.4.sup.+ as well as another aqueous solution which contains tetramethyl ammonium hydroxide and a silica source (e.g. aerosil.RTM.. After homogenization, !. The resultant gel is heated in an autoclave at a temperature between 80.degree. and 200.degree. C. It is used for catalytic oxidation.

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Titanium-Containing Mesoporous Molecular Sieves For Catalytic Oxidation of Aromtic Compounds (Peter T. Tanev, Malama Chibwe & Thomas J. Pinnavala, Nature vol. 368, Mar. 24, 1994).

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