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Abstract

This invention relates to a porous crystalline synthetic material constituted by silicon and titanium oxides, a method for synthesizing said material, and the use thereof as a catalyst. Said material is given the name titanium silicalite or TS-1, and corresponds to the following formula: xTiO.sub.2.(1-x)SiO.sub.2 where x lies between 0.0005 and 0.04, preferably between 0.01 and 0.025. The material is prepared starting from a mixture constituted by a source of silicon oxide and a source of titanium oxide. The reaction takes place in the aqueous phase at a temperature of 130.degree. to 200.degree. C., and the solid product obtained is calcined in air at 550.degree. C. The TS-1 can be used for alkylation of toluene with methanol, or benzene with ethylene or ethanol, disproportioning of toluene to produce paraxylol, for cracking, hydrocracking, isomerization of n-paraffins and naphthenes, reforming, isomerization of substituted polyalkyl aromatics, disproportioning of aromatics, conversion of dimethylether and/or methanol or other alcohols to hydrocarbons, polymerization of compounds containing olefine or acetylene bonds, conversion of aliphatic carbonyl compounds into at least partly aromatic hydrocarbons, separation of ethyl benzene from other C.sub.8 aromatic hydrocarbons, hydrogenation and dehydrogenation of hydrocarbons, methanation, oxidation, dehydration of aliphatic compounds containing oxygen, and conversion of olefines into compounds of high octane number.

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First Claim