Process for treating a carrier, a process for preparing a catalyst, the catalyst, and use of the catalyst

A process for treating an alumina carrier, or a precursor thereof, to at least partly remove impurities from the alumina carrier, or the precursor thereof, comprising:

• contacting the alumina carrier, or the precursor thereof, with a treatment solution comprising a salt in a concentration of from 0.0001 molar to 0.05 molar at a temperature of greater than 40° C. wherein the salt comprises a cation and an anion, and wherein the cation is selected from ammonium, organic cations and combinations thereof, and wherein the anion is selected from organic anions, inorganic carboxylates, oxyanions of elements from Groups IIIA through VIIA of the Periodic Table of Elements, and combinations thereof;
• and
• separating at least part of the treatment solution from the alumina carrier, or the precursor thereof.