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Quick removal of mercaptans from hydrocarbons

A technology for removal amount and hydrocarbon fluid, which is applied in refining hydrocarbon oil, treating hydrocarbon oil, purification/separation of hydrocarbon, etc., and can solve the problem of too slow removal of mercaptan remover

Inactive Publication Date: 2011-03-30
BAKER HUGHES HLDG LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Many traditional mercaptan removers remove and / or react with mercaptans too slowly

Method used

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  • Quick removal of mercaptans from hydrocarbons
  • Quick removal of mercaptans from hydrocarbons
  • Quick removal of mercaptans from hydrocarbons

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 and 2

[0024] figure 1 and figure 2 Shown in is a graph of mercaptan content as a function of the amount of mercaptan removal agent present. figure 1 is ethanethiol (embodiment 1), figure 2 is n-Butanethiol (Example 2). In both cases, the hydrocarbon fluid from which the mercaptans were removed was a blend of hexane and toluene. The dialkyl azodicarboxylate mercaptan removal agent named RE7911HSO is diethyl azodicarboxylate, which is added to the mercaptan-containing hydrocarbon at a ratio of 40 wt% in the aromatic solvent Aromatic 100.

[0025] Depend on figure 1 It can be seen that when the dosage of the removal agent is 1000ppm and higher, all ethanethiol is removed from the hydrocarbon; by figure 2 It can be seen that all n-butanethiol is removed from hydrocarbons when the dosage of stripper is 2000 ppm and higher.

Embodiment 3

[0027] In another example, a C3 mercaptan dosing Aromatic 100 / toluene blend was treated with dipropyl azodicarboxylate (DIAD, 40 wt%). Aromatic 100 is available from ExxonMobil Chemical Company. The blend was stirred for 1 hour after mixing at room temperature. The results are shown in Table I. It can be seen that all the mercaptans were removed from the blend when the dosage of different strippers was 2000 ppm.

[0028] Table I

[0029] additive

Embodiment 4

[0031] In Example 4, 328 ppm of a complex mixture of mercaptans was added to Caspian crude oil, which was then treated with RE7911 HSO remover at the dosage indicated in Examples 1 and 2. The blend was stirred for 3 hours after mixing at room temperature. The results are shown in Table II. It can be seen that the amount of mercaptans removed from the blend increases with increasing removal agent dosage.

[0032] Table II

[0033] additive

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Abstract

Mercaptans and / or hydrogen sulfide (H2S) in hydrocarbons, naphthas, gasolines, and the like may be scavenged therefrom by being brought into intimate contact with a mercaptan scavenger formulation containing at least one disubstituted azodicarboxylate of the formula R1OOCN=NCOOR2, where R1 and R2 are independently alky! groups, alkenyl groups and aromatic groups having from 1 to 18 carbon atoms. These scavengers remove mercaptans and / or H2S from hydrocarbons faster than many conventional mercaptan scavengers. An effective scavenging amount of disubstituted azodicarboxylate in the hydrocarbon fluid ranges from about 5 to about 20 parts by weight based on 1 part as sulfur of mercaptan and / or H2S.

Description

technical field [0001] The present invention relates to the removal of hydrogen sulfide (H 2 S) and / or thiol methods and compositions, and more particularly to the use of disubstituted azodicarboxylates as thiol removal agents. Background technique [0002] Hydrocarbon fluids such as crude oil, crude oil emulsions, oilfield condensates, petroleum residues, and even refined fuels often contain a variety of mercaptans, including relatively low molecular weight mercaptans. Mercaptans encountered during drilling, production, transportation, storage and processing of hydrocarbon feedstocks can cause problems ranging from foul odors to metal corrosion. Due to relatively low molecular weight thiols (such as methylthiol CH 3 SH, ethylmercaptan CH 3 CH 2 SH, and propylthiol CH 3 CH 2 CH 2 SH) are volatile, they tend to be emitted into the vapor space, and their offensive odor can cause problems in and around storage areas and throughout hydrocarbon transport lines and the tran...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G17/02C07C7/20
CPCC10G2300/104C10G2300/207C10G2300/1044C10G2300/202C10G2300/1011C10G29/20C10G2300/1033Y02P30/20
Inventor 杨建中J·J·阿伦斯多夫M·V·贝克
Owner BAKER HUGHES HLDG LLC
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