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Method for producing amide compound
US8962826B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8962826-B2 |
| Application number | US-201314141916-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 27, 2013 |
| Priority date | Mar 15, 2010 |
| Publication date | Feb 24, 2015 |
| Grant date | Feb 24, 2015 |
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Abstract
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A method for producing a high purity, high quality amide compound, particularly a lactam. An amount of each of a halide, an aldehyde compound, an alcohol compound and a nitrile compound contained in a solution recycled into an oxime-forming step is controlled to an amount of 0.4 mol% or less based on the ketone as a starting material. One or more of a ketone, an oxime and an amide compound are purified by hydrogenation and/or crystallization for eliminating impurities containing a double bond. A content of impurities having a cyclic bridge structure is controlled using a cycloalkanone purified by recrystallization.
First claim
Opening claim text (preview).
What is claimed is: 1. A process for producing a lactam, comprising: reacting a cyclic ketone and hydroxylamine to give an oxime; and conducting Beckmann rearrangement of the oxime using a Beckmann rearrangement catalyst to give a lactam, wherein the rearrangement catalyst is at least one selected from the group consisting of 4-chloro-3,5-dinitrobenzonitrile, picryl chloride, 2-chloro-3,5-dinitropyridine, trichlorotriazine, thionyl chloride, phosphorous trichloride and phosp…
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- C07D201/06Primary
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
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Frequently asked questions
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- What does patent US8962826B2 cover?
- A method for producing a high purity, high quality amide compound, particularly a lactam. An amount of each of a halide, an aldehyde compound, an alcohol compound and a nitrile compound contained in a solution recycled into an oxime-forming step is controlled to an amount of 0.4 mol% or less based on the ketone as a starting material. One or more of a ketone, an oxime and an amide compound are …
- Who is the assignee on this patent?
- Ube Industries
- What technology area does this patent fall under?
- Primary CPC classification C07D201/06. 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 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).