Method for production of aziridines and N-vinylamides
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Aug 2, 2005
Grant Date -
Oct 30, 2003
app pub date -
Apr 10, 2003
filing date -
Apr 24, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
In the production of aziridines or N-vinyl amides respectively from an alkanolamine or an alkanolamide by the known method comprising a reaction step, a collecting step and/or a condensation step, a purifying step, and a recovering step, this invention is directed toward preventing formation of a solid substance in the vacuum pumps and the vacuum lines. The object of this invention is accomplished by performing the decompression at the purifying step and the decompression at the recovering step in mutually different decompression systems.
First Claim
Other Claims data not available
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| Country | kind | publication No. | Filing Date | Type | Sub-Type |
|---|---|---|---|---|---|
| JP | B2 | JP4109893 | Apr 24, 2002 | Patent | Grant |
| DE | B4 | DE10318326 | Apr 19, 2003 | Patent | Grant |
| CN | C | CN1275941 | Apr 24, 2003 | Patent | Grant |
International Classification(s)
- 2003 Application Filing Year
- C07D Class
- 4190 Applications Filed
- 993 Patents Issued To-Date
- 23.70 % Issued To-Date
