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US-10156019-B2 · Dec 18, 2018 · US
Cerium citrate, method of making and corrosion inhibitor comprising cerium citrate
US2017350019A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2017350019-A1 |
| Application number | US-201615173847-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jun 6, 2016 |
| Priority date | Jun 6, 2016 |
| Publication date | Dec 7, 2017 |
| Grant date | — |
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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 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 dried cerium citrate to a fine powder. 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 carbonate and citric acid are subjected to high energy ball milling. 8 . The method of claim 7 , wherein the high energy ball milling is performed using stainless steel, ceramic, or tungsten balls. 9 . The method of claim 7 , wherein the cerium carbonate is a hydrate. 10 . A cerium citrate produced by the method of claim 1 , wherein the cerium citrate is substantially free of negative ions other than citrate. 11 . The cerium citrate of claim 10 , wherein the cerium citrate is hydrated. 12 . The cerium citrate of claim 10 , wherein the cerium citrate has greater than or equal to 10 weight percent water of hydration. 13 . The cerium citrate of claim 10 , wherein the cerium citrate is a trivalent cerium citrate. 14 . A corrosion inhibitor composition comprising a cerium citrate substantially free of negative ions other than citrate. 15 . The corrosion inhibitor composition of claim 14 , wherein the cerium citrate is a hydrate. 16 . The corrosion inhibitor composition of claim 14 , wherein the cerium citrate has greater than or equal to 10 weight percent water of hydration. 17 . The corrosion inhibitor composition of claim 14 , wherein the cerium citrate is a trivalent cerium citrate. 18 . The corrosion inhibitor composition of claim 14 further comprising zinc molybdate. 19 . The corrosion inhibitor composition of claim 14 in combination with at least one of an adhesive, primer, paint, lubricant, cooling fluid, sealant and epoxy. 20 . An article comprising: a metal substrate; and a corrosion inhibitor disposed on the substrate, wherein the corrosion inhibitor comprises a cerium citrate substantially free of negative ions other than citrate.
Assignees
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Classifications
Citric acid · CPC title
- C23F13/005Primary
Anodic protection · CPC title
- C07C51/412Primary
by conversion of the acids, their salts, esters or anhydrides with the same carboxylic acid part · CPC title
using organic inhibitors · CPC title
Acids; Salts thereof {(C08K3/16 takes precedence)} · CPC title
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- What does patent US2017350019A1 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 Thu Dec 07 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). 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).