Ethylene expansion for low temperature refrigeration in polyethylene vent recovery
US8835576B2 · kind B2 · utility
0Cited by
5References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 7, 2011 |
| Grant date | Sep 16, 2014 |
| Priority date | — |
| Expiry date | Jul 7, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25J2270/14
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Provided are processes and systems for recovering hydrocarbons in a vent stream from a polymerization process. The methods and systems may include the recovery of an olefin monomer from a polymerization vent gas using ethylene refrigeration to condense and recover the olefin monomers from the vent gas. In some embodiments, the methods and systems may also include compression and condensation of polymerization vent gas, recompression of ethylene refrigerant, and use of an expander compressor turbine device for ethylene refrigeration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.