发明名称 |
Verfahren zur Herstellung von aliphatischen Diisocyanaten |
摘要 |
<p>A method for making an aliphatic diisocyanate by (a) phosgenating an aliphatic diamine in the presence of an inert solvent or gas to form a crude reaction mixture; (b) distilling the crude reaction mixture to form an aliphatic diisocyanate production stream and an aliphatic diisocyanate waste stream; (c) introducing the aliphatic diisocyanate waste stream to a chamber and placing the waste stream under supercritical fluid conditions sufficient to dissolve an appreciable amount of the aliphatic diisocyanate component in the supercritical fluid; (d) separating the dissolved aliphatic diisocyanate component from the waste stream, wherein the remaining waste stream is a supercritically-purged aliphatic diisocyanate waste stream; (e) lowering the pressure sufficiently to precipitate the aliphatic diisocyanate component.</p> |
申请公布号 |
DE60004626(T2) |
申请公布日期 |
2004.06.24 |
申请号 |
DE2000604626T |
申请日期 |
2000.12.15 |
申请人 |
BAYER CORP., PITTSBURGH |
发明人 |
SOMMER, ALEXA B.;WITTIG, MARY ANN;HORTELANO, EDWIN R.;YESKE, PHILIP E.;CIEBIEN, JANE F. |
分类号 |
C07C263/10;C07C263/20;C07C265/14;(IPC1-7):C07C263/20 |
主分类号 |
C07C263/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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