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Cerium citrate, method of making and corrosion inhibitor comprising cerium citrate
US10138561B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10138561-B2 |
| Application number | US-201615173847-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 6, 2016 |
| Priority date | Jun 6, 2016 |
| Publication date | Nov 27, 2018 |
| Grant date | Nov 27, 2018 |
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Abstract
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A method of making cerium citrate includes combining cerium carbonate and citric acid to produce cerium citrate and carbon dioxide. The cerium citrate is substantially free of negative ions other than citrate. The cerium citrate can be used in a corrosion inhibitor composition.
First claim
Opening claim text (preview).
What is claimed is: 1. A method of making cerium citrate comprising combining cerium carbonate and citric acid at a temperature of 60 to 90° C. for 5 to 7 hours in an inert atmosphere and cooling and reacting for 8 to 12 hours to produce cerium citrate and carbon dioxide. 2. The method of claim 1 , wherein the cerium carbonate is a hydrated cerium carbonate. 3. The method of claim 1 , wherein the cerium carbonate and citric acid are combined in the presence of a solvent. 4. The method of claim 1 , further comprising washing the cerium citrate, drying the washed cerium citrate and reducing the size of the dried cerium citrate particles. 5. The method of claim 1 , wherein the cerium citrate has greater than or equal to 5 weight percent water of hydration. 6. The method of claim 1 , wherein the cerium citrate is a trivalent cerium citrate. 7. The method of claim 1 , wherein the cerium citrate has greater than or equal to 10 weight percent water of hydration.
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Compounds of rare earth metals · CPC title
Mixtures of inorganic inhibitors · CPC title
inorganic · CPC title
Material for sacrificial anodes · CPC title
- C23F13/005Primary
Anodic protection · CPC title
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Frequently asked questions
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- What does patent US10138561B2 cover?
- A method of making cerium citrate includes combining cerium carbonate and citric acid to produce cerium citrate and carbon dioxide. The cerium citrate is substantially free of negative ions other than citrate. The cerium citrate can be used in a corrosion inhibitor composition.
- Who is the assignee on this patent?
- United Technologies Corp
- What technology area does this patent fall under?
- Primary CPC classification C23F13/005. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Nov 27 2018 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).