ABSTRACT
Strong base a n i o n exchange resins are manufac tu red b y c h l o r o m e t h y l a t i o n of s u l p h o n a t e d polys tyrene f o l l o w e d b y react ion w i t h a ter t iary amine :
T h e y u n d e r g o the f o l l o w i n g reac t ion w i t h anions:
R e s i n — C H 2 N + C 1 " + M + + X " -> R e s i n — C H 2 — N + X ~ + C h + M +
R1R2R3 R1R2R3 or
R e s i n — C H 2 — N + C 1 ' + M X " -> R e s i n — C H 2 — N + M X ~ + C h / I \ / I \ R . R . R 3 R1R2R3
where M X " is a m e t a l con t a in ing an ion . W e a k base a n i o n exchange res ins are m a n u f a c t u r e d b y
c h l o r o m e t h y l a t i o n of s u l p h o n a t e d po lys ty rene f o l l o w e d b y reac t ion w i t h a p r i m a r y or seconda ry amine :
CH-CHI I
T h e y u n d e r g o the f o l l o w i n g react ion w i t h an ions :
eg R e s i n — N+Cl~ + X " + M+ -> R e s i n — N + X " + CI" + M +
R J R 2 H R * R 2 H or
R e s i n N + C 1 ~ + M X " -> R e s i n — N + M X " + C l " / i \ / | \ R J R 2 H R * R 2 H
w h e r e M X " is a m e t a l c o n t a i n i n g an ion . A n i o n i c exchange resins ca r ry a pos i t i ve charge a n d this reacts w i t h nega t i ve ly cha rged o r a n i o n i c o rgan ic species.
