Part-stream distillation
US-2016362387-A1 · Dec 15, 2016 · US
Methods and systems for treatment of ethylene oxide
US11447457B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11447457-B2 |
| Application number | US-201816479530-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 18, 2018 |
| Priority date | Jan 19, 2017 |
| Publication date | Sep 20, 2022 |
| Grant date | Sep 20, 2022 |
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Abstract
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Disclosed are methods for treating an ethylene oxide stream suitable for use in carbonylation reactions. Such treatment uses an inorganic solid to remove water from the ethylene oxide stream. Discloses are also systems to carry out the methods herein.
First claim
Opening claim text (preview).
What is claimed is: 1. A method of treating ethylene oxide, comprising: wetting a water-removing solid with organic solvent, or ethylene oxide, or a combination thereof; and continuously contacting the wetted water-removing solid with an ethylene oxide feed to produce a treated ethylene oxide stream, wherein the ethylene oxide feed comprises ethylene oxide and has an initial water content, the treated ethylene oxide stream comprises ethylene oxide and has a water content, and the water content of the treated ethylene oxide stream is lower than the initial water content, and wherein contacting the wetted water-removing solid with the ethylene oxide feed results in less than 10 wt % of the ethylene oxide polymerizing. 2. The method of claim 1 , wherein the treated ethylene oxide stream has a water content at least 50% lower than the initial water content. 3. The method of claim 1 , wherein: (i) the initial water content is above 5 ppm; or (ii) the water content of the treated ethylene oxide stream is less than 2 ppm; or both (i) and (ii). 4. The method of claim 1 , wherein contacting the wetted water-removing solid with the ethylene oxide feed results in less than 10 wt % of the ethylene oxide being converted to ethylene glycol. 5. The method of claim 1 , wherein the water-removing solid is a zeolite, clay, or silica, or any combinations thereof. 6. The method of claim 1 , wherein the water-removing solid is a molecular sieve. 7. The method of claim 1 , wherein contacting the water-removing solid with ethylene oxide comprises introducing ethylene oxide to the water-removing solid while maintaining the temperature of the ethylene oxide at less than 100 degrees Celsius. 8. The method of claim 1 , wherein the organic solvent comprises an ether. 9. The method of claim 1 , wherein the organic solvent comprises tetrahydrofuran, 1,4-dioxane, glyme, diglyme, triglyme, tetraglyme, diethyl ether, diphenyl ether, or methy-t-butyl ether, or any combinations thereof. 10. The method of claim 1 , wherein the organic solvent comprises tetrahydrofuran. 11. The method of claim 1 , wherein the ethylene oxide feed is gaseous or liquid. 12. The method of claim 1 , wherein the contacting the wetted water-removing solid with the ethylene oxide feed produces heat, wherein the heat produced is less than is produced when contacting a non-wetted water-removing solid with an ethylene oxide feed.
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- C07D301/32Primary
Separation; Purification · CPC title
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- What does patent US11447457B2 cover?
- Disclosed are methods for treating an ethylene oxide stream suitable for use in carbonylation reactions. Such treatment uses an inorganic solid to remove water from the ethylene oxide stream. Discloses are also systems to carry out the methods herein.
- Who is the assignee on this patent?
- Novomer Inc
- What technology area does this patent fall under?
- Primary CPC classification C07D301/32. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Sep 20 2022 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).