- The influences which caused by the kinds of the catalyzer, phenol and formaldehyde proportion, boracic acid addition and etc were discussed.
- It can avoid the acid addition caused by HAC volatilization in dyeing, reduce the dyeing time of nylon and wool.
- Several ways of titanium white waste acid applied in calcium perphosphate production are introduced. Two-step acid addition is specially proposed.
- The process condition of preparing amyl alcohol with C5 fraction as material, through sulphuric acid addition hydrolyzation was studied.