Discoloration of maleic anhydride is minimized by first passing {HEAD ~ the maleic anhydride} in {TAIL ~ molten or dissolved form} through a bed of cation exchange resin and then adding to the maleic anhydride a small amount of 3,3 thiodipropionitrile 
Discoloration of maleic anhydride is minimized by first passing { HEAD ~ the maleic anhydride } in { TAIL ~ molten or dissolved form } through a bed of cation exchange resin and then adding to the maleic anhydride a small amount of 3,3 thiodipropionitrile
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH