Natural gas liquefaction pretreatment process
US5325673A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 1993 |
| Grant date | Jul 5, 1994 |
| Priority date | — |
| Expiry date | Feb 23, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25J2270/904
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for pretreating a natural gas stream using a single scrub column to remove freezable C.sub.5+ components and provide an LNG product which can be conveniently handled and shipped is disclosed. The method comprises feeding a natural gas stream to a feed point on a scrub column operated substantially as an absorption column wherein the heavy components are absorbed from the feed gas using a liquid reflux essentially free of such C.sub.5+ components. The feed can be vapor introduced at a low point on the column, or can be optionally split, cooled and/or expanded and introduced at one or more feed points on the column. The reflux stream can be overhead vapor condensate having a temperature of about - 40.degree. C., or methane-rich LNG or a combination of LNG and vapor condensate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.