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2002-04-02 |
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Process for purifying tertiary fatty alkylmethylamines |
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1999-05-11 |
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Process for the preparation of pure aqueous betaine solutions |
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1994-12-06 |
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Process for the preparation of aqueous betaine solutions |
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Water-containing concentrate of at least one alkyl- or alkenyl-substituted ammonium compound |
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Concentrated aqueous dispersions of tetrafluoroethylene polymers, and process for their preparation |
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