Supported metal oxides for olefin metathesis and related methods
US-2016075617-A1 · Mar 17, 2016 · US
Promoters for heterogeneous olefin metathesis
US12473244B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12473244-B2 |
| Application number | US-202016870192-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 8, 2020 |
| Priority date | May 9, 2019 |
| Publication date | Nov 18, 2025 |
| Grant date | Nov 18, 2025 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
A method of improving metathesis of an olefin can include introducing a promoter to an olefin feed stream.
First claim
Opening claim text (preview).
What is claimed is: 1 . A method of converting an olefin into higher and lower homologues comprising contacting a reactant mixture of olefins with a catalyst comprising a metal oxide and introducing and co-feeding a promoter with electron-releasing groups and including an electron-rich olefin, keeping a reactant conversion below 10% at all reaction conditions, the promoter forming a fraction that positively relates to an increase metathesis activity during catalysis, wherein the promoter is a 2-butene, isobutene, 2-methyl-2-butene, 2,3-dimethyl-2-butene, a monoalkylethylene, a dialkylethylene, a trialkylethylene or a tetraalkylethylene, wherein each alkyl group is a C1-C6 alkyl group and wherein the metathesis activity is a C4-C40 alkene metathesis. 2 . The method of claim 1 , wherein the metal oxide includes a tungsten oxide. 3 . The method of claim 1 , wherein the metal oxide includes a molybdenum oxide. 4 . The method of claim 1 , wherein the metal oxide includes a rhenium oxide. 5 . The method of claim 1 , wherein co-feeding with the promoter increases a conversion rate by a factor of at least 2. 6 . The method of claim 1 , wherein co-feeding with the promoter increases a conversion rate by a factor of at least 3. 7 . The method of claim 1 , wherein the promoter is a monoalkylethylene, a dialkylethylene, a trialkylethylene or a tetraalkylethylene, wherein each alkyl group is a C1-C6 alkyl group. 8 . The method of claim 7 , wherein each alkyl group is a C1, C2 or C3 alkyl group. 9 . The method of claim 1 , wherein the promoter is a 1,1-dialkylethylene, wherein each alkyl group is a C1-C6 alkyl group. 10 . The method of claim 1 , wherein the promoter is a trialkylethylene, wherein each alkyl group is a C1-C6 alkyl group. 11 . The method of claim 1 , wherein the promoter is a tetraalkylethylene, wherein each alkyl group is a C1-C6 alkyl group. 12 . The method of claim 1 , wherein the promoter includes 2-butene, isobutene, 2-methyl-2-butene, or 2,3-dimethyl-2-butene, the promotor being different from an olefin in the reactant mixture. 13 . The method of claim 1 , wherein the promoter is pulsed into a feed stream. 14 . The method of claim 1 , wherein the promoter is between 0.5% and 10% of a feed stream. 15 . The method of claim 1 , wherein the promoter is between 0.6% and 5% of a feed stream.
Assignees
Inventors
Classifications
Scanning electron microscopy; Transmission electron microscopy · CPC title
Infrared [IR] · CPC title
Molybdenum · CPC title
Tungsten · CPC title
Rhenium · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US12473244B2 cover?
- A method of improving metathesis of an olefin can include introducing a promoter to an olefin feed stream.
- Who is the assignee on this patent?
- Massachusetts Inst Technology, Saudi Arabian Oil Co
- What technology area does this patent fall under?
- Primary CPC classification B01J23/30. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Nov 18 2025 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).