Continuous ethylene tetramerization process
US-2015284303-A1 · Oct 8, 2015 · US
Chromium complex and catalyst therefrom
US11896965B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11896965-B2 |
| Application number | US-202217966176-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 14, 2022 |
| Priority date | Mar 13, 2015 |
| Publication date | Feb 13, 2024 |
| Grant date | Feb 13, 2024 |
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- Title
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Abstract
Official abstract text for this publication.
The invention relates to oligomerization of olefins, such as ethylene, to higher olefins, such as a mixture of 1-hexene and 1-octene, using a catalyst system that comprises a) a source of chromium b) one or more activators and c) a phosphacycle-containing ligating compound. Additionally, the invention relates to a phosphacycle-containing ligating compound and a process for making said compound.
First claim
Opening claim text (preview).
What is claimed is: 1. A catalyst comprising a) a source of chromium; b) an activator; and c) a phosphacycle-containing ligating compound of the formula (II): wherein each R 5 is independently H, halogen, C 1-4 substituted or unsubstituted alkyl, C 6-10 substituted or unsubstituted aryl. 2. The catalyst as in claim 1 comprising a phosphacycle-containing ligating compound-chromium complex. 3. The catalyst of claim 1 comprising an isolated phosphacycle-containing ligating compound-chromium complex. 4. The catalyst of claim 1 comprising an in situ-formed phosphacycle-containing ligating compound-chromium complex. 5. The catalyst of claim 1 , wherein the source of chromium is selected from the group consisting of trichlorotris(tetrahydrofuran)chromium, chromium (III) acetylacetonate, chromium (III) 2-ethylhexanoate, and chromium (III) acetate. 6. The catalyst of claim 1 , wherein the source of chromium and the ligating compound are contacted in proportions to provide Cr:ligating compound molar ratios from 10:1 to 1:10. 7. The catalyst of claim 1 , wherein at least one activator is selected from the group consisting of (hydrocarbyl)aluminum compounds, (hydrocarbyl)gallium compounds, (hydrocarbyl)boron compounds, (hydrocarbyl)zinc compounds, non-coordinating, ion-forming compounds, an organic salt, an inorganic acid and salt. 8. The catalyst of claim 1 , wherein the activator is an alkylaluminoxane. 9. The catalyst of claim 1 , wherein the source of chromium and the aluminoxane are combined in proportions to provide chromium:activator molar ratios from 1:1 to 1:10,000.
Assignees
Inventors
Classifications
- B01J31/2433Primary
comprising aliphatic or saturated rings · CPC title
of aluminium · CPC title
Amide derivatives thereof · CPC title
Oxygen, e.g. acetylacetonates · CPC title
and further hetero atoms as ring members, excluding the positions adjacent to P · CPC title
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- What does patent US11896965B2 cover?
- The invention relates to oligomerization of olefins, such as ethylene, to higher olefins, such as a mixture of 1-hexene and 1-octene, using a catalyst system that comprises a) a source of chromium b) one or more activators and c) a phosphacycle-containing ligating compound. Additionally, the invention relates to a phosphacycle-containing ligating compound and a process for making said compound.
- Who is the assignee on this patent?
- Dow Global Technologies Llc
- What technology area does this patent fall under?
- Primary CPC classification B01J31/2433. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Feb 13 2024 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).