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Method for recovery of methacrolein and methanol from methacrolein dimethylacetal
US11098000B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11098000-B2 |
| Application number | US-201816644571-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 4, 2018 |
| Priority date | Sep 11, 2017 |
| Publication date | Aug 24, 2021 |
| Grant date | Aug 24, 2021 |
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Abstract
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A process for recovering methacrolein and methanol from methacrolein dimethyl acetal. The method comprises a step of contacting a mixture comprising methyl methacrylate and methacrolein dimethyl acetal with a strong acid ion exchange resin in the presence of water. The mixture comprises no more than 0.2 wt % sodium methacrylate.
First claim
Opening claim text (preview).
The invention claimed is: 1. A process for recovering methacrolein and methanol from methacrolein dimethyl acetal; said method comprising contacting a mixture comprising methyl methacrylate, sodium methacrylate, and methacrolein dimethyl acetal with a strong acid ion exchange resin in the presence of water; wherein said mixture comprises no more than 0.2 wt % sodium methacrylate. 2. The process of claim 1 wherein the strong acid ion exchange resin is a macroreticular resin. 3. The process of claim 2 wherein the strong acid ion exchange resin is in the form of beads having a harmonic mean size from 100 to 1200 microns. 4. The process of claim 2 wherein the strong acid ion exchange resin is contained in a fluid or fixed bed in a continuous reactor. 5. The process of claim 2 wherein the strong acid ion exchange resin has an average pore diameter from 20 to 600 Å. 6. The process of claim 1 wherein said mixture comprises no more than 0.1 wt % sodium methacrylate.
Assignees
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Classifications
Process efficiency · CPC title
- C07C45/515Primary
the singly bound functional group being an acetalised, ketalised hemi-acetalised, or hemi-ketalised hydroxyl group (cyclic acetals or ketals C07C45/59, C07C45/60) · CPC title
by hydrolysis · CPC title
of esters of organic acids · CPC title
with only carbon-to-carbon double bonds as unsaturation · CPC title
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- What does patent US11098000B2 cover?
- A process for recovering methacrolein and methanol from methacrolein dimethyl acetal. The method comprises a step of contacting a mixture comprising methyl methacrylate and methacrolein dimethyl acetal with a strong acid ion exchange resin in the presence of water. The mixture comprises no more than 0.2 wt % sodium methacrylate.
- Who is the assignee on this patent?
- Dow Global Technologies Llc, Rohm & Haas, Rohm Andhaas Company
- What technology area does this patent fall under?
- Primary CPC classification C07C45/515. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Aug 24 2021 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).