Linde Aktiengesellschaft

Ralph Spoeri

Stefan Lochner

High-purity nitrogen is generated by low-temperature fractionation of air in a rectification system for nitrogen/oxygen separation having at least a first rectifier column ( ). Cycle nitrogen ( ) in gas form is removed from the upper region of the first rectifier column ( ) and is compressed in a cycle compressor ( ). A first part ( ) of the compressed cycle nitrogen is liquefied. A nitrogen fraction ( ) from the rectification system for nitrogen/oxygen separation is introduced ( ) into a high-purity nitrogen column ( ) having a top condenser ( ). High-purity nitrogen ( ) is removed from the upper region of the high-purity nitrogen column ( ). The refrigeration demand of the top condenser ( ) is at least partially covered by liquefied cycle nitrogen ( ).

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Geretsried, Germany

Ralph Spoeri