【Daily Question No. 51】April 19, 2017

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In distillation classification, based on different distillation methods, it can be divided into three major categories: ( ), ( ), and ( ). Correct answer: Simple distillation, rectification, special rectification. http://bbs.hcbbs.com/static/image/hrline/4.gif The petrochemical sector – an event aimed at generating new energy-saving ideas; sponsors are being sought (highest returns ever). http://bbs.hcbbs.com/thread-1666758-1-1.html Sponsors are being recruited for this event; those interested can contact the event organizer. The petrochemical processing section – an event to share pictures of chemical equipment has started! A vast amount of wealth, as well as Haichuan coins, are waiting for you to claim them: http://bbs.hcbbs.com/thread-1760733-1-1.html. “Petroleum and Chemicals Section”: Notice regarding the collection of chemical technology materials: http://bbs.hcbbs.com/thread-1614796-1-1.html. http://bbs.hcbbs.com/hcdown/data/attachment/forum/201704/07/123053embbjkok61hz6vvz.jpg.thumb.jpg. [Haixin Chemical Cup ★ Spring has arrived for Haichuan Chemicals] Summary post of the 2017 scenic views sharing event (you can take a look at the local scenery posted by users from various places in your free time): http://bbs.hcbbs.com/thread-1766484-1-1.html