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English Translations » 历史存档[信息] » One question per day; those who answer correctly receive 6 w

One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； October 15th

2016-10-15View Original

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Multiple-choice question: When sulfuric acid is used for cleaning in the production of PVC via the calcium carbide method, which of the following materials can be used for the inner wall of the injector that transports concentrated sulfuric acid in order to prevent corrosion? （ ） A. Epoxy resin B. Acrylic glass C. Polyethylene plastic D. Acid-resistant ceramic Answer: D. Acid-resistant ceramic
Reply #22016-10-15
C polyethylene plastic: good corrosion resistance and electrical insulation properties

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Translated at 2026-07-20 23:15:46

Original: https://bbs.hcbbs.com/thread-1632274-1-1.html

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