Benzotriazole derivatives as corrosion inhibitors
US-2019203118-A1 · Jul 4, 2019 · US
Corrosion and fouling mitigation using non-phosphorus based additives
US9828269B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9828269-B2 |
| Application number | US-201514702425-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 1, 2015 |
| Priority date | Dec 28, 2012 |
| Publication date | Nov 28, 2017 |
| Grant date | Nov 28, 2017 |
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- Title
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Abstract
Official abstract text for this publication.
Water treatment compositions are provided that are effective for mitigating corrosion or fouling of surfaces in contact with aqueous systems. The water treatment compositions can include one or more azole compounds, one or more transition metals, and one or more dispersants, in addition to various other additives. The water treatment compositions can exclude phosphorus and still be effective. Methods for mitigating corrosion or fouling of a surface in an aqueous system are also provided.
First claim
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What is claimed is: 1. A water treatment composition comprising: one or more azole compounds, one or more transition metals, and one or more dispersants, wherein said water treatment composition does not comprise phosphorus, wherein said one or more dispersants comprises a mixture of polymaleic acid and a copolymer comprising acrylic acid and 2-acrylamido-2-methylpropane sulfonic acid, said one or more transition metals comprises zinc, and said one or more azole compounds comprises a mixture of butylbenzotriazole and tolyltriazole. 2. The water treatment composition of claim 1 , wherein said mixture of polymaleic acid and a copolymer comprising acrylic acid and 2-acrylamido-2-methylpropane sulfonic acid is present in an amount ranging from about 2 ppm to about 50 ppm. 3. The water treatment composition of claim 2 , wherein said one or more dispersants are present in an amount of about 3 ppm. 4. The water treatment composition of claim 1 , wherein said mixture of butylbenzotriazole and tolyltriazole is present in an amount ranging from about 3 ppm to about 20 ppm. 5. The water treatment composition of claim 1 , wherein said zinc is present in an amount ranging from about 2 ppm to about 4 ppm. 6. The water treatment composition of claim 1 , wherein said one or more dispersants comprises a mixture of polymaleic acid and a copolymer comprising acrylic acid and 2-acrylamido-2-methylpropane sulfonic acid in an amount of about 3 ppm, said one or more transition metals comprises zinc in an amount of about 4 ppm, and said one or more azole compounds comprises a mixture of butylbenzotriazole and tolyltriazole in an amount of about 3 ppm. 7. The water treatment composition of claim 1 , wherein said mixture of butylbenzotriazole and tolyltriazole is present in an amount ranging from about 1 ppm to about 50 ppm. 8. The water treatment composition of claim 1 , wherein said mixture of polymaleic acid and a copolymer comprising acrylic acid and 2-acrylamido-2-methylpropane sulfonic acid is present in an amount of about 3 ppm. 9. The water treatment composition of claim 1 , wherein said zinc is present in an amount of about 4 ppm. 10. The water treatment composition of claim 1 , wherein said mixture of butylbenzotriazole and tolyltriazole is present in an amount of about 3 ppm.
Assignees
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Classifications
Corrosion inhibition · CPC title
containing heterocyclic ring with at least one nitrogen atom as ring member · CPC title
from the paper or cellulose industry · CPC title
- C02F5/125Primary
combined with inorganic substances · CPC title
from the food or foodstuff industry, e.g. brewery waste waters · CPC title
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Frequently asked questions
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- What does patent US9828269B2 cover?
- Water treatment compositions are provided that are effective for mitigating corrosion or fouling of surfaces in contact with aqueous systems. The water treatment compositions can include one or more azole compounds, one or more transition metals, and one or more dispersants, in addition to various other additives. The water treatment compositions can exclude phosphorus and still be effective. M…
- Who is the assignee on this patent?
- Ecolab Usa Inc
- What technology area does this patent fall under?
- Primary CPC classification C02F5/125. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Nov 28 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).