Polyphosphoric acid resistant hydrogen sulfide scavenger for use in asphalt applications
US-2017022109-A1 · Jan 26, 2017 · US
Dispersion of hexamine in non-aqueous glycerine
US11518947B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11518947-B2 |
| Application number | US-201815935569-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 26, 2018 |
| Priority date | Mar 29, 2017 |
| Publication date | Dec 6, 2022 |
| Grant date | Dec 6, 2022 |
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- Title
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Abstract
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The present disclosure generally relates to dispersions useful for scavenging hydrogen sulfide. The dispersions may be anhydrous and contain a solvent and a hydrogen sulfide scavenging compound. The hydrogen sulfide scavenging compound may be hexamine, for example. The solvent may be a C 2-8 polyol, such as glycerin.
First claim
Opening claim text (preview).
What is claimed is: 1. A method of scavenging hydrogen sulfide from a medium in an industrial process, comprising: adding an effective amount of a dispersion to the medium, wherein the dispersion comprises a C 2 -C 5 polyol and a compound of formula (I) or formula (II): wherein R 1 is a substituted or unsubstituted C 1-32 alkyl, a substituted or unsubstituted C 2-32 alkenyl, or a substituted or unsubstituted C 2-32 alkynyl, and wherein the substituted C 1-32 alkyl, the substituted C 2-32 alkenyl, and the substituted C 2-32 alkynyl are substituted with a hydroxyl or a C 1-5 alkyl, wherein the dispersion comprises at least about 67% by weight of the compound of formula (I) or formula (II), wherein the dispersion is prepared by pre-heating the C 2 -C 5 polyol to about 150° F. and then adding the compound of formula (I) or formula (II) to the C 2 -C 5 polyol to form the dispersion. 2. The method of claim 1 , wherein the medium comprises a member selected from the group consisting of crude oil, diesel fuel, asphalt, and any combination thereof. 3. The method of claim 1 , wherein the medium comprises polyphosphoric acid. 4. The method of claim 1 , wherein the effective amount is from about 1 ppm to about 5,000 ppm. 5. The method of claim 1 , wherein the dispersion comprises a pH greater than about 7. 6. A method of scavenging hydrogen sulfide from a medium in an industrial process, comprising: adding an effective amount of a dispersion to the medium, wherein the dispersion comprises glycerin and at least about 67% by weight of hexamine, further wherein the dispersion is prepared by pre-heating the glycerin to about 150° F. and then adding the hexamine to the glycerin to form the dispersion. 7. The method of claim 6 , wherein the medium is asphalt.
Assignees
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Classifications
Acid gases, e.g. H2S, COS, SO2, HCN · CPC title
with organic compounds · CPC title
Bridged systems · CPC title
- C10G29/20Primary
Organic compounds not containing metal atoms · CPC title
containing oxygen as the only hetero atom · CPC title
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Frequently asked questions
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- What does patent US11518947B2 cover?
- The present disclosure generally relates to dispersions useful for scavenging hydrogen sulfide. The dispersions may be anhydrous and contain a solvent and a hydrogen sulfide scavenging compound. The hydrogen sulfide scavenging compound may be hexamine, for example. The solvent may be a C 2-8 polyol, such as glycerin.
- Who is the assignee on this patent?
- Ecolab Usa Inc
- What technology area does this patent fall under?
- Primary CPC classification C10G29/20. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Dec 06 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).