Polymer recovery process in the filtration of polyether polyols
US-9040753-B2 · May 26, 2015 · US
Process for the production of polyether polyols
US9353039B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9353039-B2 |
| Application number | US-201314402126-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 25, 2013 |
| Priority date | May 29, 2012 |
| Publication date | May 31, 2016 |
| Grant date | May 31, 2016 |
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Abstract
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A method to provide polyether polyols comprises the steps of •providing a crude polyether polyol mixture comprising polyether polyol and a base catalyst; •neutralizing said base catalyst; •removing, in a first dehydration step, at least part of the water from the neutralized polyether polyol; •redissolving at least part of the salt crystals obtained by removal of at least part of the water; •removing, in a second dehydration step, at least part of the water from the neutralized polyether polyol mixture, thereby providing salt crystals; •removing the salt crystals from the neutralized polyether polyol, thereby providing the polyether polyol mixture.
First claim
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The invention claimed is: 1. A method to provide polyether polyols, the method comprising the steps of providing a crude polyether polyol mixture comprising polyether polyol and a base catalyst; mixing the crude polyether polyol mixture with an acid and water, thereby neutralizing said base catalyst and providing a first neutralized polyether polyol mixture; removing, in a first dehydration step, at least part of the water from said first neutralized polyether polyol, thereby…
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- What does patent US9353039B2 cover?
- A method to provide polyether polyols comprises the steps of •providing a crude polyether polyol mixture comprising polyether polyol and a base catalyst; •neutralizing said base catalyst; •removing, in a first dehydration step, at least part of the water from the neutralized polyether polyol; •redissolving at least part of the salt crystals obtained by removal of at least part of the water; •re…
- Who is the assignee on this patent?
- Huntsman Int Llc
- What technology area does this patent fall under?
- Primary CPC classification C08G65/30. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue May 31 2016 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).