PROCESS FOR PREPARING MIXTURES OF DIPHENYLMETHANE DIISOCYANATES AND POLYPHENYL POLYMETHYLENE POLYISOCYANATES
摘要
<p>The present invention relates to a process for preparing mixtures of diphenylmethane diisocyanates and polyphenyl polymethylene polyisocyanates by sequential reaction of benzene to nitrobenzene to aniline to polyphenyl polymethylene polyamines to polyphenyl polymethylene polyisocyanates wherein the benzene used as the starting material contains 500 to 5000 ppm w/w toluene and/or xylenes.</p>
申请公布号
WO2008148608(A1)
申请公布日期
2008.12.11
申请号
WO2008EP55047
申请日期
2008.04.25
申请人
HUNTSMAN INTERNATIONAL LLC;CARR, ROBERT;VAN WIECHEN, NICOLAAS