A petroleum sulfonate NPS was synthesized by Suizhong low solidification point naphthene-base VGO in a single-tube film sulphonation reactor with SO3 sulfonation agent.

• 以高芳烃的中海绥中低凝环烷基减压馏分油为原料；以三氧化硫为磺化剂；采用降管膜式反应器合成出了收率高达53.；7%25、有效物含量高达80%25的石油磺酸盐(NPS)。