Abstract: Process for the production of boron-containing nickel-aluminum oxide catalysts. Solutions containing nickel and aluminum are reacted with aqueous sodium borohydride. Precipitation occurs, followed by drying and compressing the resultant precipitate into catalyst shapes. The precipitation may occur in the presence of metallic promoter salts. The catalysts are used for the methanization of carbon monoxide by hydrogen. Good results and long catalyst life are furthered by methanizing a mixture of H.sub.2 :CO of about 3:1 by volume, at an operating pressure between about 40-45 bar, and a spatial velocity between about 2.times.10.sup.4 to 10.sup.5 h.sup.-1.