公开(公告)号：US4948909A

公开(公告)日：1990-08-14

申请号：US394039

申请日：1989-08-14

申请人： Karl E. Koenig ,  Gary A. Lanser ,  Paul A. Morrison ,  Robert B. Weisenfeld

发明人： Karl E. Koenig ,  Gary A. Lanser ,  Paul A. Morrison ,  Robert B. Weisenfeld

IPC分类号： C07C253/00 ,  C07C227/26 ,  C07C229/16 ,  C07C253/32 ,  C07C255/24 ,  C07C255/25 ,  C07C255/61

CPC分类号： C07C227/26 ,  C07C255/25

摘要： An improved process is provided for producing iminodiacetonitrile by contacting ammonia, formaldehyde and hydrogen cyanide, or hexamethylenetetramine, formaldehyde and hydrogen cyanide in a reaction medium, the improvement which comprises the further steps of thereafter adjusting the pH of the reaction medium to a pH between about 5.5 and about pH 10 and heating the reaction medium to an elevated temperature for a sufficient time to convert by-products in the reaction medium to iminodiacetonitrile.