PROCESS FOR PRODUCING CHELATE-FORMING RESIN OF AMINOMETHYL PHOSPHONIC ACID

• Main Authors: SCHNEIDER,HANS-PETER,DE, EIFFLER,JUERGEN,DE, JOEKEN,GERHARD,DE
• Format: Patent
• Language: English
• Published: 28.12.1990
• Edition: 5
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

Aminomethylphosphonic chelating resins are prepared by amination, hydrolysis and methylphosphonation of haloalkylated polymer beads. The amination of the haloalkylated polymer beads is carried out with hexamethylenetetramine. The produced haloaminated beads are hydrolysed and methylphosphonated in one step without addition of a substantial amount of formaldehyde or a formaldehyde-releasing compound.