【Daily Question】Production, Storage, and Transportation - 20190905
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One question per day on the production, storage, and transportation version; 5 wealth points are awarded for correct answers； Effective participation grants 2 units of wealth ； Extra points will be given to those who provide a reasonable solution first. Multiple-choice question: Among the following chemical production processes, which one is considered a unit process? A. Separation of ethylene, propylene, etc. using cryogenic separation. B. Concentration of the NaOH solution produced by electrolysis. C. Desalination of seawater using electrodialysis. D. Condensation of hexamethylenediamine and adipic acid to form nylon 66. D. Condensation of hexamethylenediamine and adipic acid to form nylon 66
D. Adipamide and adipic acid are condensed to form nylon 66