Method of separating dimethylnaphthalene isomers

Details Method of separating dimethylnaphthalene isomers Method of separating dimethylnaphthalene isomers

2005-12-21

2009-08-18

Nguyen, Tam M (Department: 1797)

Chemistry of hydrocarbon compounds

Purification, separation, or recovery

By contact with solid sorbent

C585S820000, C585S822000

Reexamination Certificate

active

07576253

ABSTRACT:
Use of mordenite zeolite and zeolite Y as adsorbents enables a dimethylnaphthalene isomer mixture to be efficiently separated. A feedstock oil containing a dimethylnaphthalene isomer mixture including an α,α-isomer, an α,β-isomer, and a β,β-isomer is passed through an adsorbent layer (A) including mordenite zeolite together with a developing solvent. Subsequently, a liquid discharged from the adsorbent layer (A) is passed through an adsorbent layer (B) including zeolite Y. An eluent is passed through the adsorbent layer (B). The solvent is removed from the resultant eluate to obtain the α,β-isomer of dimethylnaphthalene. Similarly, the β,β-isomer of dimethylnaphthalene is obtained from the adsorbent layer (A).

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