Method for producing hydrogenated conjugated diene polymer
US-2015368387-A1 · Dec 24, 2015 · US
Heterogeneous catalyst and method for selectively hydrogenating copolymer utilizing the same
US9714301B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9714301-B2 |
| Application number | US-201414264428-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 29, 2014 |
| Priority date | Jul 23, 2013 |
| Publication date | Jul 25, 2017 |
| Grant date | Jul 25, 2017 |
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Abstract
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Disclosed is a method for selectively hydrogenating a copolymer, including contacting a heterogeneous catalyst with a copolymer to process hydrogenation. The copolymer includes aromatic rings and double bonds, and the double bonds are hydrogenated, and the aromatic rings are substantially not hydrogenated. The heterogeneous catalyst includes a metal catalyst such as platinum, palladium, platinum-iridium alloy, or platinum-rhenium alloy formed on a porous support. The hydrogenation is processed at a temperature of 40° C. to 150° C. under a hydrogen pressure of 10 kg/cm 2 to 50 kg/cm 2 .
First claim
Opening claim text (preview).
What is claimed is: 1. A method for selectively hydrogenating a copolymer, comprising: contacting a heterogeneous catalyst with a copolymer including aromatic rings and double bonds to process a hydrogenation at a temperature of 40° C. to 150° C. under a hydrogen pressure of 10 kg/cm 2 to 50 kg/cm 2 for hydrogenating the double bonds, wherein less than 5% of the aromatic rings are hydrogenated, wherein the heterogeneous catalyst consists of a metal catalyst formed on a porous support, and the metal catalyst is platinum-rhenium alloy. 2. The method as claimed in claim 1 , wherein the porous support comprises titanium oxide, aluminum oxide, zirconium oxide, or silicon oxide. 3. The method as claimed in claim 1 , wherein the copolymer is copolymerized of a polyenic monomer and a vinyl aromatic monomer. 4. The method as claimed in claim 3 , wherein the polyenic monomer comprises butadiene, isopentadiene, or combinations thereof. 5. The method as claimed in claim 3 , wherein the vinyl aromatic monomer comprises styrene, α-methylstyrene, or combinations thereof. 6. The method as claimed in claim 1 , wherein the hydrogenation is processed at a temperature of 70° C. to 120° C. under a hydrogen pressure of 30 kg/cm 2 to 40 kg/cm 2 . 7. The method as claimed in claim 1 , wherein the metal catalyst has a platinum-rhenium weight ratio of 5:0.1 to 1:5. 8. The method as claimed in claim 1 , wherein the heterogeneous catalyst comprises 0.2 wt % to 10 wt % of the metal catalyst. 9. The method as claimed in claim 1 , wherein the heterogeneous catalyst comprises 1 wt % to 5 wt % of the metal catalyst.
Assignees
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Classifications
- C08F8/04Primary
Reduction, e.g. hydrogenation · CPC title
Platinum · CPC title
Impregnation · CPC title
Titanium; Oxides or hydroxides thereof · CPC title
Palladium · CPC title
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- What does patent US9714301B2 cover?
- Disclosed is a method for selectively hydrogenating a copolymer, including contacting a heterogeneous catalyst with a copolymer to process hydrogenation. The copolymer includes aromatic rings and double bonds, and the double bonds are hydrogenated, and the aromatic rings are substantially not hydrogenated. The heterogeneous catalyst includes a metal catalyst such as platinum, palladium, platinu…
- Who is the assignee on this patent?
- Ind Tech Res Inst
- What technology area does this patent fall under?
- Primary CPC classification C08F8/04. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jul 25 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).