Canonical chemical theories exemplified by the methylolation of urea and melamine
作者:Taddesse Gebregiorgis、Manfred Gordon
DOI:10.1039/f19848000359
日期:——
Old and recent data on equilibria and kinetics of methylolation of urea and melamine are analysed. The theoretical framework affords a sequence, claimed to be canonical, of successive phenomenological approximations. The theory, expounded earlier, begins with two successive schemes whose essentials go back to early work by Pauling and by Flory. The two stages here suffice to show that all the data
Process for the manufacture of aminomethanephosphonic acid
申请人:Zeneca Limited
公开号:US05471000A1
公开(公告)日:1995-11-28
A process for the manufacture of aminomethanephosphonic acid comprises: a) reacting a compound of formula R--CH.sub.2 --NH--CO--NH--CH.sub.2 --R' wherein R and R', which may be the same or different, represent a phosphonation leaving group with a phosphonating agent and subsequently b) hydrolysing the product of step (a) to form aminomethanephosphonic acid.