This article aims at summarizing the development of research on synthesis of tributyl citrate and the catalysis of sulfonic acid inorganic salt solid superacid heteropoly acid rare earth compound.

It is mensurated that the critical salt concentration of potassium citrate is from 32.10% to 61.90% as monomer ratio increase from 0 to 33%.

The result showed that the quantities of salt, citric acid, sodium citrate, preserved plum flour and maltitol had great effects on the flavour of the troche.