公开(公告)号：DE3028791A1

公开(公告)日：1982-02-25

申请号：DE3028791

申请日：1980-07-30

Applicant: DEGUSSA

Inventor： BESCHKE HELMUT ,  DAHM FRANZ DIPL ING ,  FRIEDRICH HEINZ DIPL CHEM DR ,  PRESCHER GUENTER DIPL CHEM DR

IPC: C07D213/82 ,  C07D213/81

公开(公告)号：DE3028904A1

公开(公告)日：1982-02-25

申请号：DE3028904

申请日：1980-07-30

Applicant: DEGUSSA

Inventor： BESCHKE HELMUT ,  DAHM FRANZ DIPL ING ,  FRIEDRICH HEINZ DIPL CHEM DR ,  PRESCHER GUENTER DIPL CHEM DR

IPC: C07D213/82 ,  C07D213/81

Abstract: Crude nicotinamide is purified by a recrystallization and in this way freed especially from nicotinic acid and salts of nicotinic acid. As solvent there is used a 2-methylpropanol-1 containing water. The recrystallization takes place at a pH between about 7 and 10.