Process of manufacturing 2-(4'-diethylamino-2'-hydroxybenzoyl)benzoic acid hexyl ester
US-2024109838-A1 · Apr 4, 2024 · US
Method for the crystallization of 2-(4-N,N-diethyl amino-2-hydroxy-benzoyl)-benzoic acid-n-hexyl ester
US9550727B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9550727-B2 |
| Application number | US-201414452865-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 6, 2014 |
| Priority date | May 2, 2007 |
| Publication date | Jan 24, 2017 |
| Grant date | Jan 24, 2017 |
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- Title
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- Abstract
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- First independent claim
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Abstract
Official abstract text for this publication.
The present invention relates to a method for the crystallization of n-hexyl 2-(4-N,N-diethylamino-2-hydroxybenzoyl)benzoate, to a method for the production of pourable or flowable particles of crystalline n-hexyl 2-(4-N,N-diethylamino-2-hydroxybenzoyl)-benzoate and to specific pourable or flowable particles of crystalline n-hexyl 2-(4-N,N-diethylamino-2-hydroxybenzoyl)benzoate.
First claim
Opening claim text (preview).
The invention claimed is: 1. A pourable or flowable particle of crystalline n-hexyl 2-(4-N,N-diethylamino-2-hydroxybenzoyl)benzoate with an average particle diameter of from 0.1 to 5 mm, a bulk density greater than 0.35 g/ml and a purity of at least 98% by weight. 2. The pourable or flowable particle as claimed in claim 1 , wherein the purity is at least 99% by weight. 3. The pourable or flowable particle as claimed in claim 1 , wherein the bulk density is greater than 0.5 g/ml. 4. The pourable or flowable particle as claimed in claim 2 , wherein the bulk density is greater than 0.5 g/ml. 5. An article which comprises utilizing the pourable or flowable particle as claimed in claim 1 wherein the article is a UV filter, free-radical scavenger in cosmetic and dermatological preparation or a product protection. 6. An article which comprises utilizing the pourable or flowable particle as claimed in claim 4 wherein the article is a UV filter, free-radical scavenger in cosmetic and dermatological preparation or a product protection. 7. The pourable or flowable particle as claimed in claim 1 , wherein the purity is at least 98.5% by weight. 8. The pourable or flowable particle as claimed in claim 1 , wherein the bulk density is greater than 0.4 g/ml. 9. The pourable or flowable particle as claimed in claim 1 , wherein the average particle diameter of from 0.5 to 5 mm. 10. The pourable or flowable particle as claimed in claim 4 , wherein the average particle diameter of from 0.5 to 5 mm. 11. The pourable or flowable particle as claimed in claim 1 , wherein said n-hexyl 2-(4-N,N-diethylamino-2-hydroxybenzoyl)benzoate is made comprising the steps a) providing a clear melt of n-hexyl 2-(4-N,N-diethylamino-2-hydroxybenzoyl)-benzoate at a temperature above 57° C., and b) crystallizing out n-hexyl 2-(4-N,N-diethylamino-2-hydroxybenzoyl)benzoate at a temperature below 57° C., wherein the clear melt from process step a) is stirred at a temperature below 57° C. until opacity arises, before process step b) is carried out. 12. The pourable or flowable particle as claimed in claim 10 , wherein said n-hexyl 2-(4-N,N-diethylamino-2-hydroxybenzoyl)benzoate is made comprising the steps a) providing a clear melt of n-hexyl 2-(4-N,N-diethylamino-2-hydroxybenzoyl)-benzoate at a temperature above 57° C., and b) crystallizing out n-hexyl 2-(4-N,N-diethylamino-2-hydroxybenzoyl)benzoate at a temperature below 57° C., wherein the clear melt from process step a) is stirred at a temperature below 57° C. until opacity arises, before process step b) is carried out. 13. The pourable or flowable particle as claimed in claim 1 , wherein b) crystallizing out n-hexyl 2-(4-N,N-diethylamino-2-hydroxybenzoyl)benzoate at a temperature from 25 to 40° C. 14. The pourable or flowable particle as claimed in claim 1 , wherein b) crystallizing out n-hexyl 2-(4-N,N-diethylamino-2-hydroxybenzoyl)benzoate at a temperature from 27 to 35° C. 15. The pourable or flowable particle as claimed in claim 12 , wherein b) crystallizing out n-hexyl 2-(4-N,N-diethylamino-2-hydroxybenzoyl)benzoate at a temperature from 27 to 35° C.
Assignees
Inventors
Classifications
Particulate matter [e.g., sphere, flake, etc.] · CPC title
- C07C227/42Primary
Crystallisation · CPC title
- C07C229/52Primary
having amino and carboxyl groups bound to carbon atoms of six-membered aromatic rings of the same carbon skeleton · CPC title
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US9550727B2 cover?
- The present invention relates to a method for the crystallization of n-hexyl 2-(4-N,N-diethylamino-2-hydroxybenzoyl)benzoate, to a method for the production of pourable or flowable particles of crystalline n-hexyl 2-(4-N,N-diethylamino-2-hydroxybenzoyl)-benzoate and to specific pourable or flowable particles of crystalline n-hexyl 2-(4-N,N-diethylamino-2-hydroxybenzoyl)benzoate.
- Who is the assignee on this patent?
- Champ Samantha, Hetterich Manfred, Gottwald Günther, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification C07C227/42. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jan 24 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).