The solvent extraction of magnesium from phosphoric acid with dinonylnaphthalene sulfonic acid (DNNSA) as extractant was proposed, and the effects of extraction temperature and time, concentration of phosphoric acid and initial magnesium concentration on the extraction were studied.

This paper described the production, kinds, properties and uses of salt dinonylnaphthalene sulfonate at home and abroad.

All eight compounds were found to be effective in reducing soot emission with the sequence of barium dinonynalphthalene sulfonate>ferrocene>iron naphthenates>petroleum barium sulfonate>manganese naphthenates>cuprum naphthenates>bari.