Matheson Tri-Gas Air Separation Plant

In large industrial air separation plants atmospheric air is filtered, compressed, and cooled. The contaminants (primarily moisture, carbon dioxide and heavy hydrocarbons) are removed and are either frozen out in a reversing heat exchanger or absorbed by a molecular sieve. The air is then separated in a four column system.The columns are trayed distillation columns with vapor rising through holes in the trays as liquid travels across them, and then down to the next tray. As the vapor rises, it contains a higher percentage nitrogen, which is the lower boiling point constituent. As the liquid descends the column, it becomes richer in the higher boiling point constituents of air, oxygen and argon. The first column produces nearly pure (99.9999%) nitrogen vapor, and oxygen rich (40%) liquid. The second column produces nearly pure oxygen liquid at the bottom, and nearly pure nitrogen vapor at the top. A side stream which is rich in argon is removed from the second column. The sidestream is removed at a point where the vapor rising through the trays is about seven to fifteen percent argon, with the balance being oxygen.This stream is then distilled in a third column which produces a product stream which is about 98% argon and 2% oxygen. The remaining oxygen is removed in a catalytic oxidizer; then any trace amounts of nitrogen are removed in a fourth distillation column.

Contact Details: 8200 Washington NE Albuquerque New Mexico 87113 United States of America Tel: (505) 823-2606 Fax: (505) 857-9172 Email: celenbaas@matheson-trigas.com WWW: www.matheson-trigas.com/

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