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AssigneeSasol Germany GmbH
InventorsMichael Sakuth, Gregor Lohrengel, Dietrich Maschmeyer, Guido Stochniol
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What is claimed is a dealuminated catalyst carrier, a process for producing a catalyst carrier with reduced aluminum content based on naturally occurring lattice-layer silicates, such as, for example, montmorillonite, as well as a process for the hydration reaction of C2- or C3-olefins in which said catalyst carrier with reduced aluminium content is used. For acid-catalysed hydration reaction the catalyst carrier is impregnated with phosphoric acid. The improvements according to the invention of the hydration reaction compared to conventional processes include the fact that no aluminium is leached out of the carrier in the presence of the phosphoric acid. As a result no more blockage of the succeeding apparatus due to aluminium phosphate is expected.
A method of producing a phosphoric impregnated catalyst/catalyst carrier containing less than 0.3% by weight aluminum comprising impregnating a lattice-layer silicate with an acid, hydrothermally treating the acid-impregnated lattice-layer silicate at a temperature of between 160 and 300° C. and a partial water vapor pressure of between 4 and 80 barabs, and washing the hydrothermally treated, acid-impregnated, lattice-layer silicate with a wash solution selected from the group consisting of acidic solutions, basic solutions, and neutral solutions, wherein as part of the method, the lattice layer silicate is impregnated with phosphoric acid.
Dependencies are inferred from the claim text.