Sour Natural Gas Pretreating Method

Inactive Publication Date: 2007-06-28
INST FR DU PETROLE +1
View PDF9 Cites 32 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0014] At least part of the liquid phase obtained in stage b) at the column bottom can be d

Problems solved by technology

However, French patent application FR-2,814,378 does not allow the hydrogen sulfide and carbon dioxide content of the gas to be treated to be reduced to an acceptable

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Sour Natural Gas Pretreating Method
  • Sour Natural Gas Pretreating Method
  • Sour Natural Gas Pretreating Method

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0055] The process flowsheet described hereafter corresponds to FIG. 1. The compositions and the properties of the streams are numbered from 1 to 10 on the lines of the process flowsheet and they are defined in Table 1. The crude gas (1) is available at 30° C. and 62.3 bars. It contains approximately 18.8% by mole H2S and 1000 ppm by mole water. It is mixed with recycled stream (9). Injection of the H2S-rich liquid stream is carried out in the direction of flow of the stream through a branch line at the top of the line. The recycled stream is very rich in H2S (about 78% by mole), at a higher temperature than the crude gas because it directly comes from reboiler E2 of the column. A gas / liquid mixture (2) that is homogenized by passage through a mixer M1 is obtained.

[0056] At the outlet of mixer M1, the stream is heated up to 30° C. This stream is fed into separating drum B1. The gas phase (4) obtained is saturated with water, the excess water (5) condensing in drum B1. Gas phase (4)...

example 2

[0058] The process flowsheet described below corresponds to FIG. 2. The compositions and the properties of the streams are numbered from 1 to 11 on the lines of the process flowsheet and they are defined in Table 2.

[0059] In the diagram of FIG. 2, recycling (9) is achieved directly into separation column C1 with the stream bearing reference number (11). This recycling to the column is shown entering below gas feed point (4), but in other variants shown by dotted lines (11′), (11″), recycling can be achieved at any other level of the column, above or at the feed point. The stream directly fed into column (11) can represent all of or only part of recycled stream (9), and the other part (11′″) can be sent to gas intake (1) for example.

[0060]FIG. 2 illustrates the layout of a thermal exchanger E5 in relation to liquid recycled stream (9) from the column bottom. This exchanger allows the liquid to be more or less heated, to obtain either a gas / liquid mixture, or a gas at the dew point ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a method of pretreating a natural gas, water-saturated or not, essentially comprising hydrocarbons, a substantial amount of hydrogen sulfide and possibly carbon dioxide. The method according to the invention comprises an H2S-rich stream recycling stage.

Description

FIELD OF THE INVENTION [0001] The invention relates to a method of pretreating a water-saturated natural gas containing a substantial amount of hydrogen sulfide and possibly carbon dioxide and other sulfur compounds. The invention mainly comprises a stage of recycling a stream containing a large amount of hydrogen sulfide. BACKGROUND OF THE INVENTION [0002] Natural gas treatment generally requires a method in three successive stages. The first stage generally consists in reducing the proportion of sour gases such as hydrogen sulfide and carbon dioxide. This first stage, also known as deacidizing stage, is often followed by a water removal or dehydration stage, and by a consecutive stage of heavy hydrocarbon recovery or stripping. [0003] French patent FR-2,814,378 describes a natural gas pretreating method allowing to obtain, at a lower cost, a methane-rich gas depleted in hydrogen sulfide and freed of substantially all the water that said natural gas initially contained. Simultaneou...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C10G45/00C10G17/00
CPCB01D53/002B01D53/1462C10L3/10C10L3/102
Inventor LEMAIRE, ERICHUYGHE, RAPHAELLECOMTE, FABRICELALLEMAND, FRANCOIS
Owner INST FR DU PETROLE
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap