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Process for disposal of mercaptans

A technology for mercaptans and sulfides, applied in separation methods, gas treatment, sulfur preparation/purification, etc., can solve problems such as the limitation of the amount of mercaptans and disulfides

Inactive Publication Date: 2009-09-02
SHELL INT RES MAATSCHAPPIJ BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Another disadvantage is the limited amount of thiol and disulfide compounds that can be processed using these specialized methods

Method used

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  • Process for disposal of mercaptans

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Embodiment Construction

[0056] The present invention will be described below by way of embodiments with reference to the accompanying drawings. In the Figure, a mercaptan-containing feed gas stream is directed via line 1 to a sulfide production zone 2 . In the sulfide production zone, mercaptans are converted to sulfide compounds. The resulting liquid stream containing sulfide compounds is directed via line 3 to a liquid / liquid separator 4 where it is separated into a first liquid phase rich in liquid sulfur and a second liquid phase rich in sulfide compounds. The sulfur-rich first liquid phase is directed via line 5 to the sulfide production zone. The second liquid phase rich in sulphide compounds is directed via line 6 to the sulfur dioxide generating zone of the sulphide-comprising burner 7 . Oxygen-containing gas is supplied via line 8 to the sulphide burner. Nitrogen is optionally supplied as injection medium via line 9 to the sulfide burner. In a sulfide burner, sulfide compounds burn to fo...

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Abstract

The invention provides a process for disposal of mercaptans, the process comprising the steps of: (a) contacting a feed gas stream comprising mercaptans with liquid sulphur in a sulphide producing zone at elevated pressure and at a temperature in the range of from 300 to 450 DEG C to obtain a liquid stream comprising sulphur and sulphide compounds; (b) optionally separating the liquid stream obtained in step (a) into a first liquid phase enriched in liquid sulphur and a second liquid phase enriched in sulphide compounds; (c) combusting at least part of the sulphide compounds at elevated temperature in the presence of an oxygen-containing gas in a sulphur dioxide generation zone using a sulphide burner to which burner oxygen-containing gas is supplied, whereby at least part of the sulphide compounds is converted to sulphur dioxide to obtain a gas stream comprising sulphur dioxide.

Description

technical field [0001] The present invention relates to a method for treating mercaptans (RSH). Background technique [0002] Numerous natural gas wells produce so-called "sour gas", which usually contains hydrogen sulfide (H 2 S) natural gas, which usually also contains mercaptans. In some regions, notably the Middle East, the sour gas produced contains significant amounts of mercaptans, and a greater variety of mercaptans. [0003] Removal of mercaptans from mercaptan-containing natural gas streams is important in view of the need to meet environmental regulations and / or to meet required product specifications, such as the production of liquefied natural gas (LNG). [0004] Removal of mercaptans is also important when the gas stream is a mercaptan-laden carrier gas stream such as an inert gas or a hydrocarbonaceous gas that has been used to strip a mercaptan-containing reactor bed. Mercaptans need to be removed from this loaded gas stream so that the gas stream can be u...

Claims

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Application Information

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IPC IPC(8): C01B17/04B01D53/14
CPCB01D2257/306B01D53/1487C01B17/0408B01D53/1493
Inventor C·M·A·M·梅斯特斯C·J·史密特
Owner SHELL INT RES MAATSCHAPPIJ BV