发明名称 Catalytic hydrogeneration of nitrobenzene to 4-aminodiphenylamine in the presence of a hydroxyl compound and a solvent
摘要 This invention provides a method for preparing 4-ADPA by charging nitrobenzene into a reaction zone under hydrogen pressure in the presence of a strong organic base and a catalyst for hydrogenation. The method provides the convenience and economy of a one-step process, while producing improved yields and selectivities. The invention further provides for various embodiments of the foregoing which are suitable for the production of 4-ADPA, and the hydrogenation or reductive alkylation to produce PPD. Important to the invention are the molar ratios of aniline to nitrobenzene and nitrobenzene to the strong organic base and the choice and use of hydrogenation catalyst.
申请公布号 US5977411(A) 申请公布日期 1999.11.02
申请号 US19970872030 申请日期 1997.06.10
申请人 FLEXSYS AMERICA L.P. 发明人 DEVERA, ANTONIO L.
分类号 C07B61/00;C07C209/02;C07C209/36;C07C209/54;C07C211/54;C07C211/55;(IPC1-7):C07C209/00;C07C211/00 主分类号 C07B61/00
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