Activated carbons for environmental protection industry; Aluminium silicate; Chemical adsorbents for removing impurities from fuel; Chemical getters; Chemicals for absorbing oil; Chemicals for treating hazardous waste; Chemicals for use in decontamination of polluted sites; Grease-removing preparations for use in manufacturing processes; Mineral substances in the nature of filtering materials in environmental protection industry; Oil-purifying chemicals; Oil-separating chemicals; Water-purifying chemicals

'absorb':20 'activ':1 'adsorb':10 'aluminium':7 'carbon':2 'chemic':9,16,18,22,27,59,63,67 'decontamin':31 'environment':4,53 'filter':50 'fuel':15 'getter':17 'greas':36 'grease-remov':35 'hazard':25 'impur':13 'industri':6,55 'manufactur':42 'materi':51 'miner':44 'natur':48 'oil':21,57,61 'oil-purifi':56 'oil-separ':60 'pollut':33 'prepar':38 'process':43 'protect':5,54 'purifi':58,66 'remov':12,37 'separ':62 'silic':8 'site':34 'substanc':45 'treat':24 'use':29,40 'wast':26 'water':65 'water-purifi':64

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