方法所得出的分类是不一样的，假如依照离子型可分为阴、非、两性及阳离子聚丙烯酰胺，假如依照形状的话，能够分为胶体、涣散液、乳液和干粉颗粒四种形状，那么这四种形状哪一种更适合我们呢？公司给您一些主张，接下来是我们的经历所得，希望您会感兴趣。

??在平常假如我们常常运用，能够选择干粉颗粒状聚丙烯酰胺，The classification obtained by the method is different. If the ionic type can be divided into Yin, non, amphoteric and cationic polyacrylamide, if according to the shape, it can be divided into four shapes: colloid, laxity, emulsion and dry powder. Which of these four forms is more suitable for us? The company gives you some suggestions. Next is our experience. I hope you will be interested.
In general, if we often use it, we can choose dry powder granular polyacrylamide. Because of its highest solid content, dry powder polyacrylamide is generally stored in dry and cool places for more than two years, but if mixed with solution, its storage time will be limited. Generally speaking, when the concentration of solution is 0.1%, non-ionic and anionic polyacrylamide will dissolve. The stability of cationic polyacrylamide solution depends on the concentration of the solution. For example, the more concentrated the solution is, the longer the storage time of 3%-5% solution is, but the 3%-5% solution can not be directly used to treat sewage. This solution needs to be diluted before use, and the PH value of cationic polyacrylamide solution is less than 5.5. Stability, if greater than 6.0, will be due to hydrolysis and failure, water medium dispersion polyacrylamide shelf life of six months.
Therefore, polyacrylamide is still a better choice of solids, can be used with the mix, do not cause waste.
Of course, we must pay attention to the conditions and taboos of preserving polyacrylamide. Polyacrylamide is more sensitive to iron ions, calcium ions and magnesium ions than anionic polymers. In particular, iron ions are catalysts for the chemical degradation of all polyacrylamide. Therefore, in the manufacture, handling and storage of polyacrylamide solutions, we must try to avoid iron ions entering and touching the solution. The equipment should be made of plastics, stainless steel, FRP or carbon steel with surface coating resin.由于它的固含量，一般情况下干粉聚丙烯酰胺在干燥、阴凉的当地是寄存二年以上的，但假如配成溶液的话，它的寄存时刻就有限了，一般说，溶液浓度为0.1%的时候，非离子与阴离子聚丙烯酰胺溶液不会超过一周的时刻，阳离子聚丙烯酰胺溶液则不会超过一天，而且溶液的稳定性与溶液的浓度有关，配的浓度越浓，例如3%——5%的溶液寄存时刻越长，但3%——5%的溶液不能直接去处理污水，这种在运用前需要稀释，阳离子聚丙烯酰胺溶液PH值小于5.5的时后比较稳定，假如大于6.0的话，就会由于水解的原因而失效，水介质涣散型聚丙烯酰胺保质期为六个月。

??所以聚丙烯酰胺仍是选用固体的比较好，能够做到随配随用，不造成糟蹋。

??当然大家一定要注意保存聚丙烯酰胺各种条件和忌讳，聚丙烯酰胺对铁离子、钙离子、镁离子比阴离子聚合物质灵敏，尤其是铁离子是造成所有聚丙烯酰胺化学降解的催化剂，所以在制造、搬运与储存聚丙烯酰胺溶液的话，一定要尽量避免铁离子进入与溶液触摸设备要用塑料、不锈钢、玻璃钢或表面涂料树脂的碳钢制造。