公开(公告)号：US3848002A

公开(公告)日：1974-11-12

申请号：US27721572

申请日：1972-08-02

Applicant: CHEMINOVE AS

Inventor： WEIS J ,  PEDERSEN B

IPC: C07C67/00 ,  C07C201/00 ,  C07C205/22 ,  C07C207/04 ,  C07C79/24

CPC classification number: C07C201/00 ,  C07C201/06 ,  C07C207/04 ,  C07C205/22

Abstract: 1. A PROCESS FOR THE PRODUCTION OF P-NITROPHENOLS WHICH COMPRISES (A) MIXING (1) A NITRILE OF THE FORMULA R.O.NO, IN WHICH R IS AN ALKYL GROUP HAVING 1-6 CARBON ATOMS WITH (2) PHENOLS SELECTED FROM THE GROUP CONSISTING ESSENTIALLY OF PHENOL, M-CRESOL AND A MIXTURE OF MAND P-CRESOL IN AN ACIDIC AQUEOUS MEDIUN WHICH IS AN AQUEOUS SOLUTION OF A STRONG ACID AT TEMPERATURES RANGING FROM -20* TO 20*C TO FORM A PRECURSOR P-NITROSOPHENOL; AND (B) TREATING THE P-NITROSOPHENOL WITH NITRIC ACID IN THE PRESENCE OF AN ALCOHOL OF THE FORMULA R1OH, IN WHICH R1 IS AN ALKYL GROUP HAVING 1-6 CARBON ATOMS, AT TEMPERATURES RANGING FROM ABOUT -10* TO 25*C.; AND (C) RECOVERING A P-NITRO-PHENOL