Process for the chemoselective reduction of terminally saturated carboxylic esters
US-9193651-B2 · Nov 24, 2015 · US
Process for making biobased propylene glycol from lactic acid esters
US10138186B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10138186-B2 |
| Application number | US-201515517128-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 4, 2015 |
| Priority date | Nov 18, 2014 |
| Publication date | Nov 27, 2018 |
| Grant date | Nov 27, 2018 |
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Abstract
Official abstract text for this publication.
A process is described for making a biobased propylene glycol product at least in part from a carbohydrate-derived feed, wherein a feed comprised of a lactic acid ester is reacted with hydrogen in the presence of a catalyst, in a nonaqueous solvent in which lactide may be essentially wholly solubilized at the conditions under which the reaction is carried out, so that lactide does not precipitate out to an extent whereby plugging of the reactor or fouling of the hydrogenation catalyst is observed.
First claim
Opening claim text (preview).
What is claimed is: 1. A process for making a biobased propylene glycol product at least in part from a carbohydrate-derived feed, comprising reacting a feed comprised of propylene glycol lactic acid ester with hydrogen in propylene glycol in the presence of a catalyst, in a liquid phase reaction. 2. A process according to claim 1 , wherein the feed further comprises glycerol. 3. A process according to claim 2 , further comprising recycling propylene glycol formed by the process, glycerol or both propylene glycol product and unconverted glycerol to the liquid phase in which the reaction is conducted. 4. A process according to claim 1 , wherein the catalyst is a copper-containing catalyst. 5. A process according to claim 1 , wherein the catalyst is a copper alloy-based sponge metal catalyst. 6. A process according to claim 5 , wherein the catalyst is a Raney copper catalyst.
Assignees
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Classifications
- C07C29/149Primary
with hydrogen or hydrogen-containing gases · CPC title
1,3-Propanediol; 1,2-Propanediol · CPC title
of >C=O containing groups, e.g. —COOH · CPC title
Dihydroxylic alcohols · CPC title
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- What does patent US10138186B2 cover?
- A process is described for making a biobased propylene glycol product at least in part from a carbohydrate-derived feed, wherein a feed comprised of a lactic acid ester is reacted with hydrogen in the presence of a catalyst, in a nonaqueous solvent in which lactide may be essentially wholly solubilized at the conditions under which the reaction is carried out, so that lactide does not precipita…
- Who is the assignee on this patent?
- Archer Daniels Midland Co
- What technology area does this patent fall under?
- Primary CPC classification C07C29/149. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Nov 27 2018 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).