Adsorptive separation of dimethyl biphenyl regioisomers using 12-member ring zeolite sorbents
US10322979B2 · kind B2 · utility
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16Claims
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Key dates
| Filing date | Feb 1, 2018 |
| Grant date | Jun 18, 2019 |
| Priority date | — |
| Expiry date | Mar 3, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C15/14
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for separating dimethyl biphenyl (DMBP) isomers, including contacting a mixture of 3,3′-DMBP, 3,4′-DMBP and 4,4′-DMBP in a first solvent with a 12-member ring zeolite exchanged with potassium or barium, or combinations thereof, and adsorbing the 3,3′-DMBP onto the 12-member ring zeolite, such as by passing the mixture through at least one packed bed of the potassium and/or barium exchanged 12-member ring zeolite.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.