Processes or apparatus using separation by rectification

Child Classifications

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• F25J 2200/02 in a single pressure main column system
• F25J 2200/04 in a dual pressure main column system
• F25J 2200/08 in a triple pressure main column system
• F25J 2200/10 in a quadruple, or more, column or pressure system
• F25J 2200/20 in an elevated pressure multiple column system wherein the lowest pressure column is at a pressure well above the minimum pressure needed to overcome pressure drop to reject the products to atmosphere
• F25J 2200/30 using a side column in a single pressure column system
• F25J 2200/32 using a side column fed by a stream from the high pressure column
• F25J 2200/34 using a side column fed by a stream from the low pressure column
• F25J 2200/38 using pre-separation or distributed distillation before a main column system, e.g. in a at least a double column system
• F25J 2200/40 Features relating to the provision of boil-up in the bottom of a column
• F25J 2200/50 using multiple (re-)boiler-condensers at different heights of the column
• F25J 2200/70 Refluxing the column with a condensed part of the feed stream, i.e. fractionator top is stripped or self-rectified
• F25J 2200/72 Refluxing the column with at least a part of the totally condensed overhead gas
• F25J 2200/74 Refluxing the column with at least a part of the partially condensed overhead gas
• F25J 2200/76 Refluxing the column with condensed overhead gas being cycled in a quasi-closed loop refrigeration cycle
• F25J 2200/78 Refluxing the column with a liquid stream originating from an upstream or downstream fractionator column
• F25J 2200/80 using integrated mass and heat exchange, i.e. non-adiabatic rectification in a reflux exchanger or dephlegmator
• F25J 2200/90 Details relating to column internals, e.g. structured packing, gas or liquid distribution