50~60kg dichloromethane is added into the reactor (ETF090) by diaphragm pump to leach the reactor, and the eluent passes through the process pipeline and filter (EGL026) and nitrogen is pressed into the reactor (ETF075); The methylene chloride in the reaction kettle (No.:ETF075) passes through the bottom valve, process pipes and filters (No.:EGL016), and nitrogen is pressed into the reaction kettle (No.:ETF057).
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