Multi-component scavenging systems

Patent metadata

Field	Value
Publication number	US-9938470-B2
Application number	US-201213468697-A
Country	US
Kind code	B2
Filing date	May 10, 2012
Priority date	May 10, 2012
Publication date	Apr 10, 2018
Grant date	Apr 10, 2018

Abstract

A multi-component scavenging system containing at least one ester and at least one electron-deficient organic compound, together with or without one or more optional components such as an aldehyde having from 4 to 20 carbon atoms, a ketone having from 4 to 20 carbon atoms, an ether, a solvent, an alkali metal salt of an alkyl or dialkyl phenol, an epoxide, an alkyl anhydride, and mixtures thereof, may be used to scavenge contaminants from hydrocarbon and/or aqueous streams. The contaminants scavenged or otherwise removed may include, but are not necessarily limited to, ammonia, primary amines, secondary or tertiary amines, H 2 S, mercaptans, sulfide cyanides, and combinations thereof.

First claim

What is claimed is:

1. A method for at least partially removing a contaminant from a stream, the method comprising:
contacting the contaminant in the stream with a multi-component
scavenger in an amount of from about 1 to 10,000 ppm by volume based on the stream to at least partially remove the contaminant from the stream, where the contaminant is selected from the group consisting of hydrogen sulfide, mercaptans, ammonia, organic amines, cyanides, and combinations thereof, and where the multi-component scavenger comprises:
at least one ester selected from the group consisting of dialkyl malonate, trialkyl citrate, ethylene carbonate, diethyl carbonate, ethyl acetoacetate, butylene carbonate, and mixtures thereof, and
at least one electron-deficient organic compound; where contacting the contaminant with the at least one ester and the at least one electron-deficient organic compound may occur together or separately, and where the stream is selected from the group consisting of hydrocarbon streams, aqueous streams and combinations thereof.

2. The method of claim 1 where:
the electron-deficient organic compound is selected from the group consisting of acrylic esters, pentaerythritol tetraacrylate, dialkyl maleates, di-oxyalkylated maleates, benzoquinones, alkyl substituted quinones, and mixtures thereof.

3. The method of claim 1 where the at least one ester is present in the multi-component scavenger in a proportion ranging from about 1 to about 99 wt % and the at least one electron-deficient organic compound is present in the multi-component scavenger in a proportion ranging from about 1 to about 99 wt %.

4. The method of claim 1 where the multi-component scavenger comprises at least one additional component selected from the group consisting of an aldehyde having from 4 to 20 carbon atoms, a ketone having from 4 to 20 carbon atoms, an ether, an alkali metal salt of an alkyl or dialkyl phenol, an epoxide, and an alkyl anhydride.

5. The method of claim 4 where the at least one additional component is present in the following proportion, if present:
up to about 80 wt % of the aldehyde,
up to about 80 wt % of the ketone,
up to about 80 wt % of the ether,
up to about 50 wt % of the alkali metal salt of an alkyl or dialkyl phenol,
up to about 99 wt % of the epoxide, and
up to about 99 wt % of the alkyl anhydride.

6. A method for at least partially removing a contaminant from a stream selected from the group consisting of hydrocarbon streams, aqueous streams and combinations thereof, the method comprising:
contacting the contaminant in the stream with a multi-component scavenger in an amount effective to at least partially remove the contaminant from the stream, where the multi-component scavenger comprises:
from about 1 to about 99 wt % of at least one ester selected from the group consisting of dialkyl malonate, trialkyl citrate, ethylene carbonate, diethyl carbonate, ethyl acetoacetate, butylene carbonate, and mixtures thereof, and
from about 1 to about 99 wt % of at least one electron-deficient organic compound selected from the group consisting of acrylic esters, pentaerythritol tetraacrylate, dialkyl maleates, di-oxyalkylated maleates, and mixtures thereof;

where contacting the contaminant with the at least one ester and the at least one electron-deficient organic compound may occur together or separately.

7. The method of claim 6 , where the contaminant is selected from the group consisting of hydrogen sulfide, mercaptans, sulfides, and combinations thereof.

8. The method of claim 6 where the contaminant is selected from the group consisting of ammonia, organic amines, cyanides, and combinations thereof.

9. The method of claim 1 where the effective amount of the multi-component scavenger ranges from about 10 to about 200 ppm by volume based on the stream.

10. A method for at least partially removing a contaminant from a stream, the method comprising:
contacting the contaminant in the stream with a multi-component scavenger in an amount ranging from about 1 to about 10,000 ppm by volume based on the stream, where the multi-component scavenger comprises:
at least one ester selected from the group consisting of dialkyl malonate, trialkyl citrate, ethylene carbonate, diethyl carbonate, ethyl acetoacetate, butylene carbonate, and mixtures thereof, and
at least one electron-deficient organic compound selected from the group consisting of acrylic esters, pentaerythritol tetraacrylate, dialkyl maleates, di-oxyalkylated maleates, and mixtures thereof;

where:
contacting the contaminant with the at least one ester and the at least one electron-deficient organic compound may occur together or separately,
the contaminant is selected from the group consisting of hydrogen sulfide, mercaptans, ammonia, organic amines, cyanides, and combinations thereof, and
the stream is selected from the group consisting of hydrocarbon streams, aqueous streams and combinations thereof.

11. The method of claim 10 where the at least one ester is present in the multi-component scavenger in a proportion ranging from about 1 to about 99 wt % and the at least one electron-deficient organic compound is present in the multi-component scavenger in a proportion ranging from about 1 to about 99 wt %.

12. The method of claim 10 where the multi-component scavenger comprises at least one additional component selected from the group consisting of an aldehyde having from 4 to 20 carbon atoms, a ketone having from 4 to 20 carbon atoms, an ether, an alkali metal salt of an alkyl or dialkyl phenol, an epoxide, and an alkyl anhydride.

13. The method of claim 12 where the at least one additional component is present in the following proportion, if present:
up to about 80 wt % of the aldehyde,
up to about 80 wt % of the ketone,
up to about 80 wt % of the ether,
up to about 50 wt % of the alkali metal salt of an alkyl or dialkyl phenol,
up to about 99 wt % of the epoxide, and
up to about 99 wt % of the alkyl anhydride.

Assignees

• Yang Jianzhong
• Harrell Bradley G
• Kremer Lawrence N
• Baker Hughes A Ge Co Llc

Inventors

• Yang Jianzhong
• Harrell Bradley G
• Kremer Lawrence N

Classifications

• C10G29/22

  containing oxygen as the only hetero atom · CPC title

• C10G29/24 Primary

  Aldehydes or ketones · CPC title

• C10G2300/202

  Heteroatoms content, i.e. S, N, O, P · CPC title