Scavenging hydrogen sulfide and/or mercaptans from fluid and gas streams

a technology of sulfide and mercaptans, which is applied in the direction of hydrogen sulfides, gaseous fuels, separation processes, etc., can solve the problems of severe health hazards, objectionable presence high corrosion of hydrogen sulfide and mercaptans,

Inactive Publication Date: 2008-03-06
BAKER HUGHES HLDG LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The presence of hydrogen sulfide and mercaptans is objectionable because they often react with other hydrocarbons or fuel system components.
Further, hydrogen sulfide and mercaptans are often highly corrosive as well as emit highly noxious odors.
Uncontrolled emissions of hydrogen sulfide gives rise to severe health hazards.
Burning of such vapors neither solves toxic gas problems nor is economical since light hydrocarbons have significant value.
Generally, such compounds are either too expensive for commercial use or evidence insufficient levels of mercaptan and / or hydrogen sulfide removal.

Method used

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  • Scavenging hydrogen sulfide and/or mercaptans from fluid and gas streams
  • Scavenging hydrogen sulfide and/or mercaptans from fluid and gas streams
  • Scavenging hydrogen sulfide and/or mercaptans from fluid and gas streams

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[0037] Approximately 2.7 weight percent of scavenger in methylcyclohexane or a 50:50 volume percent methylcyclohexane / isopropanol mixture were introduced to n-propyl mercaptan and / or nonyl mercaptan solutions in methylcyclohexane. Both mercaptan concentrations were approximately 0.04 Mol / L. The scavenger was permitted to intimately mix with the mercaptan for 1 hour at 160 F. An additional test was run with nonyl mercaptan at 0° C. for 72 hours (LT test). Mercaptan removal was monitored and quantitated using GC / MS analysis. The results are set forth in Table I below.

TABLE I% Mercaptan RemainingExample No.Scavengern-PrSHC9H19SHC9H19SH LTControl100 100 100 1Morpholine bottoms6834242N,N′-di-sec-butyl-p-566164phenylenediamine31,3,5-tris-[3-(dimethylamino)propyl]8965—hexahydro-1,3,5-triazine4Tris-(2-aminoethylamine)91——5Tetraethylenepentamine6888—6Laurylamidopropyldimethylamine—3531oxide71:1 nitromethane and Morpholine—60—bottoms8C14-C16 dimethylamine oxide—22269Tetradecyldimethylamine ...

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Abstract

Hydrogen sulfide and mercaptans may be removed from a fluid or gaseous stream by reacting the hydrogen sulfide and mercaptans in the stream with a scavenger selected from a: (i.) 1,3,5-trisalkanylamino hexahydro-1,3,5-triazine derivative; (ii.) morpholine or piperazine derivative; (iii.) amine oxide; (iv.) alkanolamine; or (v.) aliphatic or aromatic polyamine.

Description

FIELD OF THE INVENTION [0001] Hydrogen sulfide and mercaptans may be removed from a fluid or gas stream, including liquid and gaseous mixtures of hydrocarbons, by contacting the stream with a scavenger of a hexahydrotriazine derivative, a morpholine or piperazine derivative, an amine oxide, an alkanolamine or a polyamine. BACKGROUND OF THE INVENTION [0002] In the drilling, production, transport, storage, and processing of crude oil, including waste water associated with crude oil production, and in the storage of residual fuel oil, hydrogen sulfide and mercaptans are often encountered. The presence of hydrogen sulfide and mercaptans is objectionable because they often react with other hydrocarbons or fuel system components. Further, hydrogen sulfide and mercaptans are often highly corrosive as well as emit highly noxious odors. Uncontrolled emissions of hydrogen sulfide gives rise to severe health hazards. Burning of such vapors neither solves toxic gas problems nor is economical si...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B01D53/48B01D53/14B01D53/52C10G21/06C10L3/10
CPCB01D53/485B01D53/52B01D2257/306C09K2208/20C10L3/10C10L3/102C09K8/532C10G21/06
Inventor PAKULSKI, MAREK K.LOGAN, PATRICKMATHERLY, RON
Owner BAKER HUGHES HLDG LLC
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