| http://www.w3.org/ns/prov#value | - The processes may be carried out at relatively low temperatures, for example from about 135??? to about 165??? C., or from 140??? C. to 165??? C., or from 140??? to 160??? C., with the cobalt atoms being present in an amount of at least about 1,800 ppm, or at least about 1,900 ppm, or at least 2,000 ppm, or at least 2,500 ppm, or from about 1,800 to about 6,000 ppm, or from about 1,900 to about 6,
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