Process and apparatus for preparing purified styrene composition using divided-wall column and crystallization unit
US12338215B2 · kind B2 · utility
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4References
18Claims
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Key dates
| Filing date | Sep 28, 2021 |
| Grant date | Jun 24, 2025 |
| Priority date | — |
| Expiry date | Oct 13, 2041 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2009/0086
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for preparing a purified styrene composition includes providing a crude hydrocarbon composition containing styrene, subjecting the crude hydrocarbon composition to a distillation in a divided-wall column to produce an overhead hydrocarbon stream, a bottom hydrocarbon stream and a side hydrocarbon stream and subjecting the side hydrocarbon stream to at least one crystallization step to obtain a purified styrene composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.