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。
2
The liquid paraffins obtained from urea-dewaxing process generally contain aromatic hydrocarbons in the range of 3~10%.
用尿素脱蜡方法生产出来的液体蜡，一般都含有3～10%的芳香烃。
3
The present invention is an improvement of dewaxing process of isopropanol and urea.