| 发明名称 | Method for producing diisocyanates by phosgenating diamine suspensions | ||
| 摘要 | The invention relates to a method for producing organic diisocyanates by reacting the corresponding diamines with phosgene in inert solvents. High-melting diamines from the series of 1,5-naphthalenediamine, tetralindiamine, 1,4-phenylenediamine, durenediamine, and o-tolidinediamine are used as diamines. According to the invention, a suspension of the diamines in inert solvents is produced, wherein dynamic mixing units, selected from dispersion disks and rotor-stator systems, are used, and the obtained suspension is phosgenated. | ||
| 申请公布号 | US9272988(B2) | 申请公布日期 | 2016.03.01 |
| 申请号 | US201314429866 | 申请日期 | 2013.09.18 |
| 申请人 | Covestro Deutschland AG | 发明人 | Laue Jörg;Steffens Christian;Krause Jens;Wershofen Stefan;Kilian Werner;Seekamp Marc;Ruhland Matthias |
| 分类号 | C07C263/10 | 主分类号 | C07C263/10 |
| 代理机构 | Drinker Biddle & Reath LLP | 代理人 | Drinker Biddle & Reath LLP |
| 主权项 | 1. A process for preparing a diisocyanate selected from the group consisting of naphthalene diisocyanate, phenylene diisocyanate, tetralin diisocyanate, o-tolidine diisocyanate and durene diisocyanate, which comprises the following steps: (i) producing a suspension of the corresponding diamine in an inert solvent, with the diamine being dispersed in the solvent by means of a dynamic mixing apparatus, (ii) contacting the diamine suspended in the inert solvent with phosgene to give the respective diisocyanate, wherein the dynamic mixing apparatus in step (i) is selected from the group consisting of dispersing discs and rotor-stator systems. | ||
| 地址 | Leverkusen DE | ||