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PL341169A1
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Method of obtaining sodium tripolyphosphate
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PL337596A1
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Catalyst for selectively oxidising ammonia to nitrous oxide by means of molecular oxygen
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PL336610A1
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Nitrous oxide decomposition catalyst for gaseous oxygen and gaseous nitrogen
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PL331266A1
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Method of utilising chromium wastes containing chromium in the form of hydrogenated chromium oxides
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PL331267A1
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Method of obtaining sodium chromate
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PL320428A1
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Method of obtaining artificial fluorite from wastes generated in production of a fodder phosphate
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PL310927A1
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Method of reducing chromium and recovering magnesium contained in chromium production mud
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PL310926A1
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Method of utilising chromium production mud with simutaneous recovery of chromium and magnesium contained therein
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PL294716A1
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Method of obtaining magnesite-chromite refractories
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PL164945B1
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Composite magnesia-calcium-chromite clinker and method of obtaining the same
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