Non-aromatic compound removal systems for para-xylene production
US12269799B2 · kind B2 · utility
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9Claims
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Key dates
| Filing date | Aug 1, 2023 |
| Grant date | Apr 8, 2025 |
| Priority date | — |
| Expiry date | Aug 1, 2043 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2317/025
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Selective removal of non-aromatic hydrocarbons from a xylene isomerization process for para-xylene production is accomplished using a membrane unit positioned within a xylene recovery loop. The membrane unit may include a one-stage or multi-stage (e.g., two-stage) membrane system and may be configured to separate a membrane unit product stream from a non-aromatics rich stream, which can be removed from the xylene recovery loop. The membrane unit may have a xylene permeance of about 60 gm/m2/hr/psi and a xylene to non-aromatic permeance ratio of about 15.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.