Solution polymerized styrene-butadiene rubber ( S-SBR ) was fractionated by repeated precipitation method, using redistilled toluene as solvent and ethyl alcohol as precipitant.
本工作用甲苯作溶剂，乙醇作沉淀剂，用沉淀分级法，对溶聚丁苯橡胶（S-SBR）进行了分级。
The spheroidicity zirconia is prepared by controlling the reactive temperatures, the precipitant reagents and adding additives through a alcohols solvent precipitation method.
采用醇溶剂沉淀法，通过控制温度、改变沉淀剂，加入添加剂等条件制备了椭球形氧化锆。
Pancreatin was extracted from pig pancreas using isopropyl alcohol as solvent and chitosan as precipitant.
目的：采用异丙醇为提取剂，一种新型沉淀剂壳聚糖对猪胰脏中胰酶的制备工艺进行研究。
Pancreatin was extracted from pig pancreas using isopropyl alcohol as solvent and chitosan as precipitant.
目的：采用异丙醇为提取剂，一种新型沉淀剂壳聚糖对猪胰脏中胰酶的制备工艺进行研究。
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