solvent refining agent

例句：

1. 1.Solvent refining agents are usedto remove impurities from crude oil.
   溶剂精炼剂用于从原油中去除杂质。
2. 2. The process of solvent refiningis crucial for the quality of refined oil.
   溶剂精炼过程对于精炼油的质量至关重要。
3. 3.The solvent refining agent was developedto improve the efficiency of oil refining.
   这种溶剂精炼剂的开发是为了提高石油精炼的效率。