Renewable olefins from a mixture of acetic acid and propionic acid
US-9212106-B2 · Dec 15, 2015 · US
Lactic acid direct synthesis process
US8962882B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8962882-B2 |
| Application number | US-201314087203-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 22, 2013 |
| Priority date | Oct 25, 2012 |
| Publication date | Feb 24, 2015 |
| Grant date | Feb 24, 2015 |
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Abstract
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This invention concerns a process for obtaining lactic acid in a single stage by direct oxidation in an aqueous medium of 1,2-propanediol in the presence of a mixture of heterogeneous catalysts, in conditions of low temperature and low pressure. The reaction takes place in the presence of oxygen and a mixture of heterogeneous catalysts, consisting of a first catalyst of noble metal supported in metallic oxide, and a second basic solid catalyst. The mixture of catalysts is easily recovered by filtration at the end of the process, to be reused. The lactic acid is obtained directly, with selectivity between 50% and 97%.
First claim
Opening claim text (preview).
The invention claimed is: 1. Process for direct synthesis of lactic acid, which process comprises oxidation of 1,2-propanediol in the presence of oxygen and a mixture of catalysts, which mixture of catalysts comprises: a first metallic catalyst comprising a supported noble metal; and a second basic catalyst which comprises a basic oxide wherein: the oxidation takes place at a temperature of from 30° C. to 100° C.; and the first metallic catalyst comprises at least one of the noble…
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- C07C51/235Primary
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
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- What does patent US8962882B2 cover?
- This invention concerns a process for obtaining lactic acid in a single stage by direct oxidation in an aqueous medium of 1,2-propanediol in the presence of a mixture of heterogeneous catalysts, in conditions of low temperature and low pressure. The reaction takes place in the presence of oxygen and a mixture of heterogeneous catalysts, consisting of a first catalyst of noble metal supported in…
- Who is the assignee on this patent?
- Petróleo Brasileiro S A —Petrobras, Int—Instituto Nac De Tecnologia, Petroleo Brasileiro S A —Petrobras
- What technology area does this patent fall under?
- Primary CPC classification C07C51/235. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Feb 24 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).