Double mixed refrigerant liquefaction process for natural gas
US4504296A · kind A · utility
23Cited by
7References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 18, 1983 |
| Grant date | Mar 12, 1985 |
| Priority date | — |
| Expiry date | Jul 18, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S62/912
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process and system are set forth for precooling, liquefying and subcooling a methane-rich feed stream, such as natural gas, with two closed circuit multicomponent refrigerant cycles in which the first refrigerant comprises a binary mixture of propane and butane in a flash refrigeration cycle and the second refrigerant comprises a mixture of nitrogen, methane, ethane, propane and butane in a subcool refrigeration cycle. The first refrigerant preferably cools the feed stream in a plate and fin heat exchanger.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.