RING-SHAPED CATALYST FOR PREPARING ACROLEIN AND ACRYLIC ACID, AND USE THEREOF (As Amended)
US-2015367329-A1 · Dec 24, 2015 · US
Processes for making methacrylic acid
US9751823B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9751823-B2 |
| Application number | US-201615183991-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 16, 2016 |
| Priority date | Oct 31, 2012 |
| Publication date | Sep 5, 2017 |
| Grant date | Sep 5, 2017 |
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Abstract
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Processes are described for making methacrylic acid via methacrolein from a biobased isobutene, wherein the biobased isobutene is prepared from ethanol or from acetic acid in the presence of a Zn x Zr y O z mixed oxide catalyst, the biobased isobutene is oxidized to methacrolein and the methacrolein is further oxidized to methacrylic acid.
First claim
Opening claim text (preview).
The invention claimed is: 1. A process for making methacrylic acid via methacrolein from a biobased isobutene, comprising: in a single, first step and without isolating any intermediate species, converting acetic acid to isobutene in the presence of a mixed oxide catalyst comprised of oxides of Zn and Zr in which the ratio of Zn:Zr is from about 1:100 to about 10:1; oxidizing the isobutene to methacrolein with a source of oxygen in the presence of a catalyst; and further oxidizing methacrolein to methacrylic acid with a source of oxygen in the presence of a catalyst. 2. The process of claim 1 , wherein the mixed oxide catalyst used in converting acetic acid to isobutene contains less than 0.14 percent by weight of sulfur. 3. The process of claim 2 , wherein the catalyst contains less than 0.01 percent by weight of sulfur. 4. The process of claim 3 , wherein the catalyst contains less than 0.001 percent by weight of sulfur.
Assignees
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Classifications
- C07C51/252Primary
of propene, butenes, acrolein or methacrolein · CPC title
of zinc, cadmium or mercury · CPC title
of only one compound · CPC title
in propene or isobutene · CPC title
starting from organic compounds containing only oxygen atoms as heteroatoms · CPC title
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- What does patent US9751823B2 cover?
- Processes are described for making methacrylic acid via methacrolein from a biobased isobutene, wherein the biobased isobutene is prepared from ethanol or from acetic acid in the presence of a Zn x Zr y O z mixed oxide catalyst, the biobased isobutene is oxidized to methacrolein and the methacrolein is further oxidized to methacrylic acid.
- Who is the assignee on this patent?
- Archer Daniels Midland Co, Univ Washington State, Archer Daniels Midland Co
- What technology area does this patent fall under?
- Primary CPC classification C07C51/252. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Sep 05 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).