Selective sorption of 2,6-diisopropylnaphthalene
First Claim
1. A process for enriching the fraction of 2,6-diisopropylnaphthalene contained in a feed stream of mixed diisopropylnaphthalenes comprising contacting said feed stream with an adsorbant bed containing one or more crystalline molecular sieves being characterized as having twelve membered oxygen rings and pore aperture dimensions between approximately 5.5 Å
- and 7.0 Å and
which demonstrate shape selective preference for 2,6-diisopropylnaphthalene over other dialkylated naphthalenes, separating said feed stream from said adsorbant bed and contacting the adsorbant bed with a desorbant capable of substantially desorbing said 2,6-diisopropylnaphthalene from the pores of said crystalline molecular sieves.
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Abstract
A process for enriching the fraction of 2,6-diisopropylnaphthalene contained in a quantity of mixed dialkylated naphthalenes. The mixed dialkylated naphthalenes are contacted with an adsorbant bed containing one or more molecular sieves which demonstrate shape selective preference for the 2,6-diisopropylnaphthalene isomer over other dialkylated naphthalenes. The adsorbant bed is then contacted with a desorbant capable of desorbing the 2,6-diisopropylnaphthalene from the pores of the adsorbant.
17 Citations
31 Claims
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1. A process for enriching the fraction of 2,6-diisopropylnaphthalene contained in a feed stream of mixed diisopropylnaphthalenes comprising contacting said feed stream with an adsorbant bed containing one or more crystalline molecular sieves being characterized as having twelve membered oxygen rings and pore aperture dimensions between approximately 5.5 Å
- and 7.0 Å and
which demonstrate shape selective preference for 2,6-diisopropylnaphthalene over other dialkylated naphthalenes, separating said feed stream from said adsorbant bed and contacting the adsorbant bed with a desorbant capable of substantially desorbing said 2,6-diisopropylnaphthalene from the pores of said crystalline molecular sieves. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 30)
- and 7.0 Å and
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16. A process for separating the isomer 2,6-diisopropylnaphthalene from a quantity of mixed isomers of dialkylated naphthalenes comprising contacting said quantity of mixed isomers with an adsorbent bed containing one or more crystalline molecular sieves being characterized as having twelve membered oxygen rings and pore aperture dimensions between approximately 5.5 Å
- and 7.0 Å and
which demonstrate shape selective preference for the 2,6-diisopropylnaphthalene isomer over other dialkylated naphthalene isomers, separating the adsorbant bed from the mixed isomers, followed by contacting the adsorbant bed with a desorbant for desorbing the 2,6-diisopropylnaphthalene isomer from the pores of the crystalline molecular sieves. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 31)
- and 7.0 Å and
Specification