Patent ID: 6638889
Filing Date: 2003-10-28
Classification: B01J,C07C

Abstract:
A method of pre-treating a catalyst support to be used in a catalyst-forming process involving impregnation of the support in neutral or acidic conditions, which method comprises introducing onto and/or into an untreated particulate catalyst support selected from the group consisting in Al2O3, titania (TiO2) and magnesia (MgO), a modified component which is capable, when present in and/or on the catalyst support, of suppressing the solubility of the catalyst support in aqueous acid solutions and/or neutral aqueous solutions, said modifying component being selected from the group consisting in Si, Zr, Cu, Zn, Mn, Ba, Co, Ni and La and calcining the resultant modifying component-containing catalyst support to decompose organic groups or to form spinel structures with the support, at a temperature from 400Â° C. to 800Â° C. and for a period of from 1 minute to 4 hours, to obtain a protected modified catalyst support which is less soluble or more inert in the aqueous acid solutions and/or the neutral aqueous solutions, than the untreated catalyst support, with the modifying component being present, in the modified catalyst support particles, on the particle surfaces by being chemically bonded to the particle surfaces, provided that when the modifying component comprises Co or Zr, the calcination temperature is from 600Â° C. to 800Â° C.