DOPO derivative flame retardants
US-9522927-B2 · Dec 20, 2016 · US
Method of purifying organic diphosphite compounds
US9108988B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9108988-B2 |
| Application number | US-201213731725-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 31, 2012 |
| Priority date | Dec 30, 2011 |
| Publication date | Aug 18, 2015 |
| Grant date | Aug 18, 2015 |
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Abstract
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A method of purifying an organic diphosphite of general formula (I) The method comprises providing a crude organic diphosphite of general formula (I) that is at least partly dissolved in a first solvent (L1), wherein (L1) is selected from the group consisting of alkylbenzenes, aryl alkyl ethers, chlorobenzene, and mixtures thereof, and precipitating by admixing with a second solvent (L2) selected from the group consisting of linear C 1 -C 4 -alkanols, ethylene glycol di(C 1 -C 4 -alkyl) ethers, and mixtures thereof, and separating off the precipitated organic diphosphite from the solvents.
First claim
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The invention claimed is: 1. A method of purifying an organic diphosphite of general formula (I) wherein R 1 , R 2 , R 3 and R 4 are each, independently of one another, hydrogen, unsubstituted straight-chain or branched C 1 -C 6 -alkyl, unsubstituted straight-chain or branched C 1 -C 6 -alkoxy, C 6 -C 10 -aryl, chlorine, formyl, acyl or (C 1 -C 6 -alkoxy)carbonyl,…
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- C07F9/65746Primary
Chemistry & Metallurgy · mapped topic
- C07F9/025Primary
Chemistry & Metallurgy · mapped topic
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- What does patent US9108988B2 cover?
- A method of purifying an organic diphosphite of general formula (I) The method comprises providing a crude organic diphosphite of general formula (I) that is at least partly dissolved in a first solvent (L1), wherein (L1) is selected from the group consisting of alkylbenzenes, aryl alkyl ethers, chlorobe…
- Who is the assignee on this patent?
- Basf Se
- What technology area does this patent fall under?
- Primary CPC classification C07F9/65746. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Aug 18 2015 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).