Using spent caustic solution from pygas treatment to neutralize halogens from liquified waste plastic
US12195674B2 · kind B2 · utility
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14Claims
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Key dates
| Filing date | Sep 16, 2022 |
| Grant date | Jan 14, 2025 |
| Priority date | — |
| Expiry date | Feb 13, 2043 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/143
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Processes and facilities for producing recycled chemical products from waste plastic are described herein. The processes include treating process streams, such as a pyrolysis gas stream and/or at least a portion of a cracker furnace effluent stream, in a caustic scrubber process to remove certain components, such as carbon dioxide. The spent caustic solution from the caustic scrubber process is then recycled and reused in other caustic processes within the facility, which can include a halogen neutralization process from removing halogens from a liquification process off-gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.