There are also indications that these materials and other similar derivatives of the asphaltenes, especially those containing such functions as carboxylic or hydroxyl, readily exchange cations and could well compete with synthetic zeolites.

• 另有迹象表明，这些物质和沥青质的其它类似衍生物，尤其是具有诸如羧基和羟基功能的物质，能够迅速地交换阳离子，并且同沸石形成有力抗衡。