| 摘要 |
PROBLEM TO BE SOLVED: To develop a chlorine-free dewaxing auxiliary effective for all types (light type, heavy type, and bright stock) of wax-containing hydrocarbon oils in the solvent dewaxing method. SOLUTION: This dewaxing auxiliary is obtained by polymerizing an alkyl (meth)acrylate whose alkyl group has 6-22 carbon atoms in the presence of a random or block copolymer of a 2-4C olefin and an alkyl (meth)acrylate whose alkyl group has 1-22 carbon atoms. The dewaxing auxiliary shows effects on all types of wax-containing hydrocarbon oils singly. Further, it is chlorine- free, and accordingly environmentally friendly, and has no fear of the corrosion of equipments even if it should be decomposed. |
