Method of reducing scale in the bayer process
US-2015175844-A1 · Jun 25, 2015 · US
Scale inhibitor compositions and methods of using
US11046794B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11046794-B2 |
| Application number | US-201514969918-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 15, 2015 |
| Priority date | Dec 17, 2014 |
| Publication date | Jun 29, 2021 |
| Grant date | Jun 29, 2021 |
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Abstract
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Silicon containing polyamine scale inhibitors derived from poly(primary amine)s are disclosed. The scale inhibitors can be used to reduce siliceous scale formation in industrial process streams such as alumina recovery process streams, nuclear waste streams and kraft paper mill effluent streams.
First claim
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What is claimed is: 1. A scale inhibiting polymer comprising: a polymer backbone functionalized with a hydrophobe-containing compound and a silane compound, wherein the polymer backbone is one or more of the group consisting of polyvinyl amine and polyallylamine, wherein the hydrophobe-containing compound is one or more of the group consisting of 1-bromopropane, propylene oxide, 1,2-epoxydodecane, 1,2-epoxyhexane, (2,3-epoxypropyl) benzene, butyl gycidyl ether, 1-bromododecane, and the hydrophobe-containing compound is present at 1-40 mol %, and wherein the silane compound is one or more of the group consisting of (5,6-epoxyhexyl)triethoxysilane and (3-glycidoxypropyl)trimethoxysilane, and the silane is present at 9-20 mol %. 2. The scale inhibiting polymer of claim 1 , wherein the polymer backbone is polyvinyl amine. 3. The scale inhibiting polymer of claim 1 , wherein the polymer backbone is polyallylamine. 4. The scale inhibiting polymer of claim 1 , wherein the hydrophobe-containing compound is 1-bromopropane. 5. The scale inhibiting polymer of claim 1 , wherein the hydrophobe-containing compound is propylene oxide. 6. The scale inhibiting polymer of claim 1 , wherein the hydrophobe-containing compound is 1,2-epoxydodecane. 7. The scale inhibiting polymer of claim 1 , wherein the hydrophobe-containing compound is 1,2-epoxyhexane. 8. The scale inhibiting polymer of claim 1 , wherein the hydrophobe-containing compound is (2,3-epoxypropyl)benzene. 9. The scale inhibiting polymer of claim 1 , wherein the hydrophobe-containing compound is butyl glycidyl ether. 10. The scale inhibiting polymer of claim 1 , wherein the hydrophobe-containing compound is 1-bromododecane. 11. The scale inhibiting polymer of claim 1 , wherein the silane compound is (5,6-epoxyhexyl)triethoxysilane. 12. The scale inhibiting polymer of claim 1 , wherein the silane compound is (3-glycidoxylpropyl)trimethoxysilane. 13. A method of reducing siliceous scale formation in an industrial process that is susceptible to siliceous scale formation, comprising adding a scale-reducing amount of a polymer to an industrial process stream, the polymer comprising: a polymer backbone functionalized with a hydrophobe-containing compound and a silane compound, wherein the polymer backbone is one or more of the group consisting of polyvinyl amine and polyallylamine, wherein the hydrophobe-containing compound is one or more of the group consisting of 1-bromopropane, propylene oxide, 1,2-epoxydodecane, 1,2-epoxyhexane, (2,3-epoxypropyl) benzene, butyl glycidyl ether, 1-bromododecane, and the hydrophobe is present at 1-40 mol %, and wherein the silane compound is one or more of the group consisting of (5,6-epoxyhexyl)triethoxysilane and (3-glycidoxypropyl)trimethoxysilane, and the silane is present at 9-20 mol %.
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Classifications
characterised by the flocculant added to the slurry (final clarification of the aluminate solution C01F7/47) · CPC title
- C08F126/02Primary
by a single or double bond to nitrogen · CPC title
by a single or double bond to nitrogen · CPC title
Water in cooling circuits · CPC title
Introducing metal atoms or metal-containing groups · CPC title
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- What does patent US11046794B2 cover?
- Silicon containing polyamine scale inhibitors derived from poly(primary amine)s are disclosed. The scale inhibitors can be used to reduce siliceous scale formation in industrial process streams such as alumina recovery process streams, nuclear waste streams and kraft paper mill effluent streams.
- Who is the assignee on this patent?
- Cytec Ind Inc
- What technology area does this patent fall under?
- Primary CPC classification C08F126/02. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jun 29 2021 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).