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US-9523514-B2 · Dec 20, 2016 · US
Method for cleaning a (meth)acrylate ester process tank
US9815097B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9815097-B2 |
| Application number | US-201214344470-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 13, 2012 |
| Priority date | Sep 27, 2011 |
| Publication date | Nov 14, 2017 |
| Grant date | Nov 14, 2017 |
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- Title
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- Abstract
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Abstract
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Provided is a method for removing deposited solid residue from equipment used in the processing of (meth)acrylic acid or esters, including the steps of dissolving the solid residue in a cleaning solution comprising an organic carboxylic acid to produce a solid residue slurry; and removing the solid residue slurry from the equipment.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for removing solid residue from equipment used in the processing of (meth)acrylic acid or esters, comprising the steps of: dissolving the solid residue in a cleaning solution comprising 90 wt % or more of an organic carboxylic acid having 2-10 carbon atoms to produce a solid residue slurry; and removing the solid residue slurry from the equipment. 2. The method of claim 1 wherein the organic carboxylic acid is acetic acid, propionic acid, acetic anhydride, propionic anhydride or combinations thereof. 3. The method of claim 1 wherein the cleaning solution has a pKa from 3 to 7. 4. The method of claim 1 wherein the cleaning solution to solid residue is in a ratio of 1 to 1. 5. The method of claim 1 wherein the cleaning solution to solid residue is in a ratio of 2 to 1. 6. The method of claim 1 further comprising soaking the solid residue in the cleaning solution for 24 hours before removing the solid residue slurry. 7. The method of claim 1 wherein the cleaning solution further comprises 3-5 wt % of acrylic acid and 1-2 wt % of water. 8. The method of claim 1 wherein the dissolving solid residue in the cleaning solution comprises agitating the solid residue. 9. The method of claim 1 wherein the dissolving and removing steps are repeated after 24 hours. 10. The method of claim 1 wherein the dissolving step is carried out at temperatures less than 100° C. and at atmospheric pressure. 11. The method of claim 1 wherein the dissolving step is carried out at temperatures less than 40° C. and at atmospheric pressure. 12. The method of claim 1 wherein the dissolving step is carried out at room temperature and at atmospheric pressure. 13. The method of claim 1 wherein the cleaning solution comprises from 90 wt % to 95 wt % of the organic carboxylic acid having 2-10 carbon atoms. 14. A method for removing solid residue from equipment used in the processing of (meth)acrylic acid or esters, comprising the steps of: dissolving the solid residue in a composition consisting of 100 wt % of an organic carboxylic acid to produce a solid residue slurry wherein the organtic caroxylic acid is acetic acid, propionic acid, acetic anhydrine, propionic anhydride, or combinations thereof; and removing the solid residue slurry from the equipment.
Assignees
Inventors
Classifications
Cleaning hollow articles by methods or apparatus specially adapted thereto · CPC title
Cleaning by the force of jets or sprays · CPC title
Cleaning containers having tubular shape, e.g. casks, barrels, drums (B08B9/20 take precedence) · CPC title
by the force of jets or sprays · CPC title
by methods involving the use of tools, e.g. by brushes, scrapers · CPC title
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Frequently asked questions
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- What does patent US9815097B2 cover?
- Provided is a method for removing deposited solid residue from equipment used in the processing of (meth)acrylic acid or esters, including the steps of dissolving the solid residue in a cleaning solution comprising an organic carboxylic acid to produce a solid residue slurry; and removing the solid residue slurry from the equipment.
- Who is the assignee on this patent?
- Juliette Jamie J, Maillot Philippe P, Mendoza Joy L, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification B08B9/08. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Nov 14 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).