Processes for separating dimethyl biphenyl isomers using zeolite adsorbents
AssigneeExxonMobil Research and Engineering Company
InventorsChangyub Paek, Michael P. Lanci, Randall D. Partridge, Allen W. Burton, Peter I. Ravikovitch, Sumathy Raman
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Abstract
In a process for separating one or more 3,3′-, 3,4′- and 4,4′-dimethyl biphenyl isomers, a feed comprising the isomers is contacted with an adsorbent containing a zeolite having a largest diffuse along dimension of at least 4 Angstroms. The adsorbents provide selective adsorption of 4,4′-dimethyl biphenyl.
Claims25
A process for separating one or more of the dimethyl biphenyl (DMBP) isomers including 3,3′-DMBP, 3,4′-DMBP and/or 4,4′-DMBP from a mixture comprising two or more of said isomers, the process comprising a step of contacting said mixture with an adsorbent comprising at least one zeolite, wherein the zeolite structure type comprises BEA, FAU, MFI, MEL, MTW, MOR, LTL, EMT, FER, MAZ, MEI, TON, MWW, EUO, MFS, IMF, MRE, ITN, MTT, MSE or IWV, wherein said zeolite has a largest diffuse along dimension of at least about 4 Angstroms (Å) to separate one or more of the dimethyl biphenyl isomers from said mixture.
A process for modifying the relative amounts of the dimethyl biphenyl (DMBP) isomers including 3,3′-DMBP, 3,4′-DMBP and/or 4,4′-DMBP in a mixture comprising two or more of said isomers, the process comprising a step of contacting said mixture with an adsorbent comprising at least one zeolite, wherein the zeolite structure type comprises BEA, FAU, MFI, MEL, MTW, MOR, LTL, EMT, FER, MAZ, MEI, TON, MWW, EUO, MFS, IMF, MRE, ITN, MTT, MSE or IWV, wherein said zeolite has a largest diffuse along dimension of at least about 4 Angstroms (Å) to modify the relative amounts of the dimethyl biphenyl (DMBP) isomers in said mixture.
Dependencies are inferred from the claim text.