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C01C1/02—Preparation, purification or separation of ammonia
C01C1/12—Separation of ammonia from gases and vapours
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FR421905D1910-09-091910-09-09Procédé et appareils pour l'obtention directe du goudron et de l'ammoniaque des gaz de la distillation
ExpiredFR421905A
(fr)