The extraction raffinate can be concentrated by one-stageevaporation to obtain sulfuric acid with 80% of mass fraction.
萃余液经一次性蒸发浓缩,可得到质量分数80%以上的硫酸。
2
The retrofit is given of the prilling basket, second stageevaporation separator and control valve for pressure in the hydrolysis system in a urea unit based on the ammonia stripping process.
介绍氨气提法尿素装置的造粒喷头、二段蒸发水离器及分解系统压力控制阀的改造情况。
3
The free toluene diisocyanate(TDI) in the curing agent TDI-TMP(Trimethylol Propane) of polyurethane was separated in laboratory by means of high-vacuum two-stage thin-film evaporation.