发明授权
US4948909A Process for the preparation of iminodiacetonitrile and iminodiacetic acid
失效
亚氨基乙腈和亚氨基二乙酸的制备方法
- 专利标题： Process for the preparation of iminodiacetonitrile and iminodiacetic acid
- 专利标题（中）： 亚氨基乙腈和亚氨基二乙酸的制备方法
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申请号： US394039申请日： 1989-08-14
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公开(公告)号： US4948909A公开(公告)日： 1990-08-14
- 发明人: Karl E. Koenig , Gary A. Lanser , Paul A. Morrison , Robert B. Weisenfeld
- 申请人： Karl E. Koenig , Gary A. Lanser , Paul A. Morrison , Robert B. Weisenfeld
- 申请人地址： MO St. Louis
- 专利权人： Monsanto Company
- 当前专利权人： Monsanto Company
- 当前专利权人地址： MO St. Louis
- 主分类号： C07C253/00
- IPC分类号： C07C253/00 ; C07C227/26 ; C07C229/16 ; C07C253/32 ; C07C255/24 ; C07C255/25 ; C07C255/61
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.
公开/授权文献
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