CHEMICALS TO ASSIST IN THE PURIFICATION OF CHEMICAL AND FEEDSTOCKS AND [ BATCHERS ] * BATCHES * OF INDUSTRIAL LIQUIDS, VAPOURS, AND GASES; CATALYSTS; CHEMICAL ABSORBENTS AND CHEMICAL ADSORBENTS FOR USE IN AMMONIA AND METHANOL PLANTS AND FOR USE IN HYDROGENATION FOR DE-AROMATIZATION OF COMMERCIAL SOLVENTS, AND OF WHITE OILS PRODUCTION; HYDROGENATION CATALYSTS FOR PYROLYSIS GASOLINE HYDROGENATION, BENZENE HYDROGENATION FOR HIGH PURITY CYCLOHEXANE, AROMATIC AND OLEFIN SATURATION IN NAPHTHAS AND ...