Method for producing conjugated diolefin and apparatus for production
US-9255041-B2 · Feb 9, 2016 · US
Method for producing butadiene
US9790140B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9790140-B2 |
| Application number | US-201415021540-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 9, 2014 |
| Priority date | Sep 12, 2013 |
| Publication date | Oct 17, 2017 |
| Grant date | Oct 17, 2017 |
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Abstract
Official abstract text for this publication.
A method for producing butadiene from 2,3-butanediol with high selectivity without using a radioactive substance is disclosed. The method for producing butadiene comprises the step of dehydrating 2,3-butanediol in the presence of a catalyst containing an alkali metal salt of phosphoric acid such as an alkali metal dihydrogen phosphate supported on silica. Preferred examples of the alkali metal herein include K, Rb, and Cs. The catalyst is preferably a catalyst prepared by calcination of the silica to which the alkali metal of phosphoric acid is attached.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for producing butadiene, said method comprising dehydrating 2,3-butanediol in the presence of a catalyst containing an alkali metal dihydrogen phosphate supported on silica to produce a product stream containing butadiene. 2. The method according to claim 1 , wherein a weight ratio of said alkali metal dihydrogen phosphate to the total weight of said silica and said alkali metal dihydrogen phosphate in said catalyst is not less than 5 wt % and not more than 40 wt % before supporting said alkali metal dihydrogen phosphate on said silica. 3. The method according to claim 1 , wherein the alkali metal in said alkali metal dihydrogen phosphate is one or more selected from the group consisting of K, Rb, and Cs. 4. The method according to claim 1 , wherein said alkali metal dihydrogen phosphate is supported on said silica by calcination of silica to which alkali metal dihydrogen phosphate was attached. 5. The method according to claim 1 , wherein a reaction temperature of the dehydrating 2,3-butanediol is not less than 380° C. and not more than 520° C.
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Classifications
Drying, e.g. preparing a suspension, adding a soluble salt and drying · CPC title
Phosphates or other compounds comprising the anion (PnO3n+1)(n+2)- · CPC title
- C07C1/24Primary
by elimination of water · CPC title
Phosphoric acid or other acids with the formula Hn+2PnO3n+1 · CPC title
Heat treatment {(B01J37/0009, B01J37/0018 take precedence)} · CPC title
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- What does patent US9790140B2 cover?
- A method for producing butadiene from 2,3-butanediol with high selectivity without using a radioactive substance is disclosed. The method for producing butadiene comprises the step of dehydrating 2,3-butanediol in the presence of a catalyst containing an alkali metal salt of phosphoric acid such as an alkali metal dihydrogen phosphate supported on silica. Preferred examples of the alkali metal …
- Who is the assignee on this patent?
- Toray Industries
- What technology area does this patent fall under?
- Primary CPC classification C07C1/24. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Oct 17 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 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).