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Cerium citrate, method of making and corrosion inhibitor comprising cerium citrate
US11780799B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11780799-B2 |
| Application number | US-201816197955-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 21, 2018 |
| Priority date | Jun 6, 2016 |
| Publication date | Oct 10, 2023 |
| Grant date | Oct 10, 2023 |
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- Title
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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 corrosion inhibitor composition comprising: an anodic corrosion inhibitor comprising a permanganate, a tungstate and/or a vanadate; and a cerium citrate containing less than 0.1 weight percent chloride and nitrate, has the formula Ce(C 6 H 5 O 7 ), has greater than or equal to 10 weight percent water of hydration, and is synthesized by combining cerium carbonate and citric acid to produce cerium citrate and carbon dioxide. 2. The corrosion inhibitor composition of claim 1 in combination with at least one of an adhesive, primer, paint, lubricant, cooling fluid, sealant and epoxy. 3. An article comprising: a metal substrate; and a corrosion inhibitor disposed on the substrate, wherein the corrosion inhibitor comprises: an anodic corrosion inhibitor comprising a permanganate, a tungstate and/or a vanadate; and a cerium citrate containing less than 0.1 weight percent of chloride and nitrate, has the formula Ce(C 6 H 5 O 7 ), has greater than or equal to 10 weight percent water of hydration and is synthesized by combining cerium carbonate and citric acid to produce cerium citrate and carbon dioxide.
Assignees
Inventors
Classifications
- C07C51/412Primary
by conversion of the acids, their salts, esters or anhydrides with the same carboxylic acid part · CPC title
Citric acid · CPC title
Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced {(electrically insulating plastics, resins or waxes H01B3/30)}; Filling pastes · CPC title
Inorganic compounds · CPC title
inorganic · CPC title
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- What does patent US11780799B2 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?
- Rtx Corp
- What technology area does this patent fall under?
- Primary CPC classification C07C51/412. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Oct 10 2023 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).