Method and system for producing pipeline quality natural gas
US9649591B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Jan 30, 2015 |
| Grant date | May 16, 2017 |
| Priority date | — |
| Expiry date | Jul 24, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2323/46
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method and system for recovering natural gas liquids (NGLs) from hydrocarbon mixtures and for producing a pipeline quality natural gas (NG) stream from a NG stream with a BTU content greater than about 1100 BTU per standard cubic foot. An NG or petroleum gas stream containing NGLs is delivered to a crossflow semipermeable membrane filtration apparatus wherein the semipermeable membrane is wetted with an organic liquid to render the membrane oleophilic. The NG stream is delivered at a pressure of at least about 150 psig. NGLs permeate through the wetted oleophilic membrane at a backpressure of at least 120 psig and maintain the desirable membrane characteristics; they are collected as liquids at a pressure of at least about 15 psig. A pipeline quality, primarily methane retentate stream of not greater than about 1050 BTU/scf is produced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.