Olefin Siv process

In the physical separation process, a molecular sieve adsorbent is used as in the Union Carbide Olefins Siv process (88—90). Linear butenes are selectively adsorbed, and the isobutylene effluent is distilled to obtain a polymer-grade product. The adsorbent is a synthetic 2eohte, Type 5A in the calcium cation exchanged form (91). UOP also offers an adsorption process, the Sorbutene process (92). The UOP process utilizes ahquid B—B stream, and uses a proprietary rotary valve containing multiple ports, which direct the flow of Hquid to various sections of the adsorber (93,94). The cis- and trans-isomers are alkylated and used in the gasoline blending pool. 

In the specific area of C4 cut treatment, two techniques have culminated in industrial plants. Union Carbide s Olefin-Siv process and UOP s Sorbutene process. 

Typical performance of Union Carbides Olefin-Siv process (% Wt)... 

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See also in sourсe #XX -- [ ]

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