| abstract |
A preparation method for a carbon 10 heavy aromatic low naphthalene aromatic solvent having a distillation a range of 175-205°C, comprising the following steps: a raw material of a carbon 10 heavy aromatic is fed into two stages of reduced pressure rectification devices that are connected in sequence, a product having a distillation range of 175-205°C is collected from the top of a second-stage rectification column by means of a rectification method, then the product is sequentially fed into a crystallization device bearing a mother liquid circulation mechanism and a liquid-solid separation device and is crystallized, and a mother liquid is collected, i.e., a carbon 10 heavy aromatic low naphthalene aromatic solvent having a distillation range of 175-205°C, which is also referred to as S-150, wherein a crystal is naphthalene and the crystallization temperature is -5 to -26°C. |