辐照法合成农用保水剂(中试Ⅱ)

Synthesis of Superabsorbent by Means of Irradiation(Pilot Scale ExperimentationⅡ)

以2-丙烯酰胺基-2-甲基丙磺酸(2-Acrylamide-2-Methylpropanesulfonic acid,AMPS)和丙烯酰胺(Acrylamide,AM)为单体,三羟甲基丙烷二烯丙基醚(Trimethyl Propane Di-allyl Ether,TMPDE)为交联剂,碳酸钾中和,采用水溶液辐照法,在高吸水性树脂工业生产线上进行了农用保水剂中试试验。在固定的原料配比:AM 1120 kg、AMPS 355 kg、水3400 kg溶解、交联剂TMPDE 4 kg、K2CO3121 kg条件下,考察了动态辐射剂量、破胶粒径、破胶造粒分散剂、干燥条件对产品性能的影响。通过中试,确定了工业生产的工艺参数:动态条件下控制辐照总剂量2.0 kGy,辐照聚合后凝胶用斯潘-20酒精溶液做破胶造粒分散剂,破胶粒径控制在5mm,振动流化床干燥温度控制在130℃时,产品性能较佳,生产效率较好。中试产品干燥速率可达650 kg.h-1,合成的AMPS/AM农用保水剂在蒸馏水和盐水中的吸水倍数分别达到580、78,抗紫外时间165min。

The pilot experiment of synthesis of superabsorbent,using the AMPS and AM as monomers,the TMPDE as cross-linking agent,K2CO3 as neutralizer,and adopting the irradiation method in water system,was carried out on production line.The influences of dynamic irradiation dose,gel breaking particle size,type of dispersant and drying condition on product performances were investigated under the raw material ratio that 1120kg of AM,355kg of AMPS,3400kg of water,4kg of TMPDE and 121kg of K2CO3.The results indicated that the product had high productivity and good performance when the dynamic radiation dose was 2.0kGy,the span-20 alcohol solution was used as the dispersant,the particle size of colloid was controlled in 5mm and the drying temperature was 130℃.In that condition,the water absorptivity and saline solution absorptivity of pilot testing products were 580 and 78 respectively.The anti-ultraviolet time was 165minutes and the drying rate reached up to 650kg·h-1.