Method for producing isocyanates in the gas phase
US-2015299111-A1 · Oct 22, 2015 · US
Process for preparing polyisocyanates from biomass
US8933262B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8933262-B2 |
| Application number | US-201213479961-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 24, 2012 |
| Priority date | May 24, 2011 |
| Publication date | Jan 13, 2015 |
| Grant date | Jan 13, 2015 |
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Abstract
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The present invention relates to a process for preparing polyisocyanates from natural raw material sources, in which a composition comprising low molecular weight aromatics which comprise at least one hydroxy group or at least one alkoxy group per molecule (oxyaromatics) is produced from a biomass material, these oxyaromatics are converted into the corresponding aromatic amines and, optionally after condensation with formaldehyde, reacted further with phosgene to give compounds comprising isocyanate groups.
First claim
Opening claim text (preview).
The invention claimed is: 1. A process for preparing a polyisocyanate, the process comprising: phosgenating a composition comprising aromatic amines having a C 14 to C 12 isotope ratio in the range from 0.5×10 −12 to 5×10 −12 , wherein the composition comprising aromatic amines is prepared from a biomass starting material by decomposing the biomass starting material, to obtain an oxyaromatic composition comprising an aromatic comprising at least one selected from the group co…
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- C07C263/10Primary
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
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- What does patent US8933262B2 cover?
- The present invention relates to a process for preparing polyisocyanates from natural raw material sources, in which a composition comprising low molecular weight aromatics which comprise at least one hydroxy group or at least one alkoxy group per molecule (oxyaromatics) is produced from a biomass material, these oxyaromatics are converted into the corresponding aromatic amines and, optionally …
- Who is the assignee on this patent?
- Stroefer Eckhard, Machhammer Otto, Bitterlich Stefan, and 10 more
- What technology area does this patent fall under?
- Primary CPC classification C07C263/10. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jan 13 2015 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).