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Solid catalyst for dehydration of sugar alcohol and method for preparing dianhydrosugar alcohol using said catalyst
US9920064B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9920064-B2 |
| Application number | US-201515322584-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 3, 2015 |
| Priority date | Jul 16, 2014 |
| Publication date | Mar 20, 2018 |
| Grant date | Mar 20, 2018 |
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Abstract
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The present invention addresses the problem of providing a solid catalyst capable of achieving high selectivity and high yield for isosorbide, preferably at the same time, in a dehydration reaction by which dianhydrosugar alcohol is obtained from a sugar alcohol, particularly, in a dehydration reaction by which isosorbide is obtained from sorbitol. The above-mentioned problem is solved by a solid catalyst for a dehydration reaction for preparing dianhydrosugar alcohol from sugar alcohol, said catalyst including an H-type β zeolite having an atomic composition ratio of Si to Al (Si/Al) of more than 20.
First claim
Opening claim text (preview).
The invention claimed is: 1. A solid, catalyst for a dehydration catalyst, comprising an H-type β zeolite having an atomic composition ratio of Si to Al (Si/Al) of more than 20. 2. The solid, dehydration catalyst according to claim 1 , wherein the Si/Al ratio is 400 or less. 3. A method for producing a dianhydrosugar alcohol from a sugar alcohol, comprising bringing the sugar alcohol into contact with the catalyst according to claim 1 . 4. The method according to claim 3 , wherein the amount of the H-type β zeolite contained in the catalyst is 5 to 60 parts by mass, based on 100 parts by mass of the sugar alcohol. 5. The method according to claim 3 , further comprising maintaining the sugar alcohol brought into contact with the catalyst under ambient pressure or under reduced pressure. 6. The method according to claim 3 , further comprising maintaining the sugar alcohol brought into contact with the catalyst at a temperature of 110° C. to 170° C. 7. The method according to claim 3 , further comprising maintaining the sugar alcohol brought into contact with the catalyst for 1.5 hours or more. 8. The method according to claim 3 , wherein the sugar alcohol is selected from the group consisting of sorbitol, mannitol and iditol. 9. The method according to claim 3 , wherein the sugar alcohol is sorbitol, and the dianhydrosugar alcohol is isosorbide.
Assignees
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Classifications
Zeolite Beta · CPC title
- C07D493/04Primary
Ortho-condensed systems · CPC title
Other general methods · CPC title
of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65 · CPC title
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- What does patent US9920064B2 cover?
- The present invention addresses the problem of providing a solid catalyst capable of achieving high selectivity and high yield for isosorbide, preferably at the same time, in a dehydration reaction by which dianhydrosugar alcohol is obtained from a sugar alcohol, particularly, in a dehydration reaction by which isosorbide is obtained from sorbitol. The above-mentioned problem is solved by…
- Who is the assignee on this patent?
- Univ Hokkaido Nat Univ Corp, Clariant Catalysts Japan Kk
- What technology area does this patent fall under?
- Primary CPC classification C07D493/04. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Mar 20 2018 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).