High purity light liquid paraffin and low condensing point kerosene are produced by urea complex using Zhongyuan crude oil distilling cut as raw materials.
以中原原油直馏馏分为原料，用尿素络合法制得纯度较高的轻液体石蜡和低凝点煤油。
High purity heavy liquid paraffin and low condensing point dewaxing oil are produced by urea complex using Daqing crude oil distilling cut as raw materials.
以大庆直馏柴油为原料，经异丙醇尿素脱蜡制得纯度较高的重质液体石蜡和低凝点脱蜡油。
The complex crystal ofm-cresol and urea has been firstly cultivated by using a mixed solvent including ethanol and THF at a proper ratio.
通过使用一定配比的乙醇和四氢呋喃作混合溶剂，第一次培养出尿素和间甲酚的复合物单晶。
So water-retaining agents could mix urea and low concentration potassium in process of production, and we can study complex water-retaining agents which compose the nitrogen and potassium too.
因此，在生产过程中可以考虑保水剂与尿素和低浓度的钾肥混合施用，也可以进行赋氮肥、钾肥的复合型保水剂研究。
Results showed that Alginate Zn complex adsorbed urea by means of coordination effect between zinc and urea.
结果表明海藻酸锌络合物对尿素的吸附主要是通过锌与尿素之间的配位作用进行的。
New type Alginate Zn complex beads were prepared for removing of urea moleculars for the first time. Characteristics of urea adsorption under different conditions were discussed.
首次采用海藻酸锌络合物配位吸附尿素分子，研究了这类络合物在不同条件下对尿素的吸附性能。
New type Alginate Zn complex beads were prepared for removing of urea moleculars for the first time. Characteristics of urea adsorption under different conditions were discussed.
首次采用海藻酸锌络合物配位吸附尿素分子，研究了这类络合物在不同条件下对尿素的吸附性能。
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