Process for the Production of Xylenes
US-2015376086-A1 · Dec 31, 2015 · US
Process and composition for inhibiting the polymerization of cyclopentadiene compounds
US9670116B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9670116-B2 |
| Application number | US-201615137805-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 25, 2016 |
| Priority date | Mar 20, 2013 |
| Publication date | Jun 6, 2017 |
| Grant date | Jun 6, 2017 |
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Abstract
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A process for inhibiting the polymerization of cyclopentadiene compounds (B) by contacting the cyclopentadiene compound with a quinone methide compound (A) of structure (I), Compositions (AB) comprising (A) and (B) are also provided.
First claim
Opening claim text (preview).
The invention claimed is: 1. A process for inhibiting polymerization of a cyclopentadiene compound (B), the process comprising: contacting the cyclopentadiene compound (B) with at least one compound (A); wherein (A) is a compound of structure (I) wherein R 1 and R 2 are each tert-butyl; and R 3 is —CN or —O—R 10 , where R 10 is methyl, ethyl, n-propyl, iso-propyl, n-butyl, n-pentyl, or n-hexyl. 2. The process according to claim 1 , wherein the cyclopentadiene compound (B) is at least one selected from the group consisting of cyclopentadiene, dicyclopentadiene, alkylated cyclopentadiene, and alkylated dicyclopentadiene. 3. The process according to claim 1 , wherein the cyclopentadiene compound (B) is at least one of cyclopentadiene and dicycloptentadiene. 4. The process according to claim 1 , wherein the at least one compound (A) forms a solution (AC) with at least one solvent (C), wherein the solvent (C) is at least one selected from the group consisting of benzene, a mono-alkylated aromatic compound, a polyalkylated aromatic compound, an alkane having a carbon number of 6 to 15, a cycloalkane having a carbon number of 6 to 15, a high-boiling hydrocarbon cut, an ether having a carbon number of 6 to 15, and an ester having a carbon number of 6 to 15. 5. The process according to claim 4 , wherein a ratio of a total weight of the at least one compound (A) in the solution (AC) to a total weight of the at least one solvent (C) in the solution (AC) is from 1:1000 to 100:1. 6. The process according to claim 1 , wherein a total concentration of the at least one compound (A) is between 10 ppb and 100,000 ppm, based on a total weight of all cyclopentadiene compounds. 7. The process according to claim 1 , wherein the cyclopentadiene compound (B) is a component of a process stream and a concentration of the cyclopentadien compound (B) is 0.0001 to 15 wt % based on the total weight of the process stream. 8. The process according to claim 1 , wherein R 3 is —CN.
Assignees
Inventors
Classifications
- C07C7/20Primary
Use of additives, e.g. for stabilisation · CPC title
containing a phenol or quinone moiety · CPC title
the ring being unsaturated · CPC title
containing nitrogen and oxygen · CPC title
Dicyclopentadienes; Hydrogenated dicyclopentadienes · CPC title
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Frequently asked questions
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- What does patent US9670116B2 cover?
- A process for inhibiting the polymerization of cyclopentadiene compounds (B) by contacting the cyclopentadiene compound with a quinone methide compound (A) of structure (I), Compositions (AB) comprising (A) and (B) are also provided.
- Who is the assignee on this patent?
- Rinker Stefanie, Ludwig Bettina, Neumann Manfred, and 5 more
- What technology area does this patent fall under?
- Primary CPC classification C07C7/20. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jun 06 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).