Multistage chemical separation method and apparatus using...

B - Operations – Transporting – 01 – D

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B01D 53/047 (2006.01) B01D 53/04 (2006.01) B01D 53/06 (2006.01)

Patent

CA 2274390

A pressure swing adsorption system for separating components of a gaseous feed including a first rotary module and a second rotary module. Each of the rotary modules comprises a stator and a rotor. The stator includes a first stator valve surface, a second stator valve surface, a plurality of first function compartments opening into the first stator valve surface, and a plurality of second function compartments opening into the second stator valve surface. The rotor is rotatably coupled to the stator and includes a first rotor valve surface in communication with the first stator valve surface, a second rotor valve surface in communication with the second stator valve surface. A plurality of flow paths having first adsorbent material therein and disposed in the rotor. Each of the first flow paths includes a pair of opposite flow path ends. A plurality of apertures are provided in the rotor valve surfaces and in communication with the flow path ends and the first function compartments for cyclically exposing the first flow path to a plurality of discrete pressure levels between the upper and lower pressures for maintaining uniform gas flow through the first primary and secondary function compartments. A gaseous mixture is passed through the first adsorbent material in the first rotary module, producing a first intermediate light product. The first intermediate light product is then passed through the second rotary module to effect further separation of light and heavy gas fractions.

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