Methods of controlling shutdown of reactor systems
US12065518B2 · kind B2 · utility
0Cited by
9References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 13, 2019 |
| Grant date | Aug 20, 2024 |
| Priority date | — |
| Expiry date | Jul 14, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2400/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Controlling the shutdown of a polyethylene reactor system that includes a secondary compressor, a reactor, a high pressure let down valve (HPLDV), a high-pressure separator, and a high-pressure recycle gas system is provided. After a partial or complete shutdown of secondary compressor, HPLDV opens to a pre-set open position until the reactor pressure reduces to either a pre-set reduced pressure limit or a until the slope of the reactor gas density to reactor pressure exceeds 0.15. The HPLDV controls the pressure to a pressure set point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.