Low pressure re-absorber and its integration with sulfur-rich solvent flash drum or sulfur-rich solvent stripper in an absorption unit
US-2015375163-A1 · Dec 31, 2015 · US
Sterically hindered amines and associated methods
US9700832B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9700832-B2 |
| Application number | US-201615070050-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 15, 2016 |
| Priority date | Dec 1, 2010 |
| Publication date | Jul 11, 2017 |
| Grant date | Jul 11, 2017 |
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- Title
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Abstract
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Amine compositions comprising sterically hindered amines and associated methods are provided. In some embodiments, amine compositions of the present disclosure may be useful for selective removal of H 2 S from an acidic gas stream.
First claim
Opening claim text (preview).
What is claimed is: 1. A method comprising: contacting a gaseous stream comprising sulfur-containing compounds with an amine composition comprising a mixture of at least two sterically hindered amines obtained from the reaction of a polyethylene glycol with a tertiarybutylamine in the presence of a nickel-based hydrogenation catalyst wherein the at least two sterically hindered amines comprise a first amine with the formula: and a second amine with the formula: wherein x is an integer from 3 to 14; y is an integer from 3 to 14, and the weight ratio of the first amine to the second amine is about 2.5:1 to about 6:1. 2. The method of claim 1 further comprising contacting the gaseous stream with a strong acid. 3. The method of claim 2 wherein the strong acid is phosphoric acid or sulfuric acid. 4. The method of claim 2 wherein x is an integer from 7 to 14 and y is an integer from 7 to 14. 5. The method of claim 4 wherein the weight ratio of the first amine to the second amine is about 4:1. 6. A composition comprising an amine composition comprising a mixture of at least two sterically hindered amines comprising a first amine with the formula: and a second amine with the formula: wherein x is an integer from 7 to 14; y is an integer from 3 to 14 and the weight ratio of the first amine to the second amine is about 2.5:1 to about 6:1, and a liquid medium comprising water or an organic solvent or a mixture thereof. 7. The composition of claim 6 further comprising a strong acid.
Assignees
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Classifications
Carbon dioxide · CPC title
Monoamines · CPC title
Cross-Sectional Technologies · mapped topic
with one hydroxyl group · CPC title
Hydrogen · CPC title
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Frequently asked questions
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- What does patent US9700832B2 cover?
- Amine compositions comprising sterically hindered amines and associated methods are provided. In some embodiments, amine compositions of the present disclosure may be useful for selective removal of H 2 S from an acidic gas stream.
- Who is the assignee on this patent?
- Huntsman Petrochemical Llc
- What technology area does this patent fall under?
- Primary CPC classification B01D53/1462. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Jul 11 2017 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).