Purifying organophosphorus compounds contaminated with chlorine
US-2016326197-A1 · Nov 10, 2016 · US
Process for reducing the chlorine content of organotetraphosphites
US9701697B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9701697-B2 |
| Application number | US-201615277247-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 27, 2016 |
| Priority date | Sep 28, 2015 |
| Publication date | Jul 11, 2017 |
| Grant date | Jul 11, 2017 |
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Abstract
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Universally usable process for reducing the chlorine content of organotetraphosphites.
First claim
Opening claim text (preview).
The invention claimed is: 1. Process for reducing the chlorine content in an organotetraphosphite of one of the formulae III, IV, V, VI, VII, VIII, IX, X, XI, XII, XIII, XIV and XV: comprising the following process steps: a) contacting the organotetraphosphite with a solution comprising at least one solvent and at least one base, where the at least one solvent is selected from acetonitrile, ethyl acetate, ethanol, propanol, toluene, b) adjusting the temperature to a value in the range from −20° C. to +15° C., c) removing the purified organotetraphosphite. 2. Process according to claim 1 , wherein the solution with which the organotetraphosphite is contacted in step a) contains, as well as the at least one solvent and the at least one base, also max. 5% water based on the solvent content. 3. Process according to claim 1 , wherein the at least one base is selected from triethylamine and dimethylaminobutane. 4. Process according to claim 1 , wherein the organotetraphosphite used in process step a) has a chlorine content of 1500 ppm to 100 000 ppm. 5. Process according to claim 1 , wherein the purified organotetraphosphite has a chlorine content of <1000 ppm. 6. Process according to claim 2 , wherein the at least one base is selected from triethylamine and dimethylaminobutane. 7. Process according to claim 2 , wherein the organotetraphosphite used in process step a) has a chlorine content of 1500 ppm to 100 000 ppm. 8. Process according to claim 3 , wherein the organotetraphosphite used in process step a) has a chlorine content of 1500 ppm to 100 000 ppm. 9. Process according to claim 2 , wherein the purified organotetraphosphite has a chlorine content of <1000 ppm. 10. Process according to claim 3 , wherein the purified organotetraphosphite has a chlorine content of <1000 ppm. 11. Process according to claim 4 , wherein the purified organotetraphosphite has a chlorine content of <1000 ppm.
Assignees
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Classifications
- C07F9/2475Primary
of aralkylamines · CPC title
Cyclic amide derivatives of acids of phosphorus, in which two nitrogen atoms belong to the ring · CPC title
the molecule containing more than one cyclic phosphorus atom · CPC title
- C07F9/65744Primary
condensed with carbocyclic or heterocyclic rings or ring systems · CPC title
of aromatic amines (N-C aromatic linkage) · CPC title
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- What does patent US9701697B2 cover?
- Universally usable process for reducing the chlorine content of organotetraphosphites.
- Who is the assignee on this patent?
- Evonik Degussa Gmbh
- What technology area does this patent fall under?
- Primary CPC classification C07F9/2475. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jul 11 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).