- 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.
- The boracic acid was used to prepare flexible graphite and the effect of amount of boracic acid addition on expanded volume, oxidation resistance, specific resistance and tensile strength of the fexible graphite obtained were analysed.