High purity light liquid paraffin and low condensing point kerosene are produced by ureacomplex 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。
2
High purity heavy liquid paraffin and low condensing point dewaxing oil are produced by ureacomplex 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。
3
The complex crystal ofm-cresol and urea has been firstly cultivated by using a mixed solvent including ethanol and THF at a proper ratio.