Extractive distillation for aromatics recovery
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United States of America Patent
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Dec 29, 2015
Issued Date -
N/A
app pub date -
Feb 23, 2015
filing date -
Feb 23, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
Extractive distillation for recovering aromatic hydrocarbons employs an extractive distillation column with a novel overhead system including a partial condenser. The process enables (i) efficient removal of heavy non-aromatics, particularly C8 naphthenic compounds, from the EDC bottom stream to increase the purity of aromatic products, especially of the mixed xylenes and (ii) reduction (or better control) of benzene loss to the raffinate product stream to maintain its quality as a gasoline blend stock and, as a result, enhance benzene recovery in the aromatic products. Feedstock includes a full-range feedstock, such as pyrolysis gasoline, or a narrow-range feedstock, such as reformate.
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Patent Citation Ranking
- 7 Citation Count
- C07C Class
- 34.61 % this patent is cited more than
- 10 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Jun 29, 2027 |