Yield:-

Reaction Conditions:

with thionyl chloride;sodium hydroxide in water;1,2-dichloro-ethane;N,N-dimethyl-formamide for 7 h;Reflux;Large scale;Time;

Steps:

3.2 Example 3
The 5000 kg dichloroethane pumped into the 11:50 vote plus step precipitated material was dried, and then pumped into 600 kg of thionyl chloride and dimethyl formamide 60 kg.Stirring, the reaction was heated at reflux for 7 hours heating, the exhaust gas generated by the reaction with 30% sodium hydroxide solution absorption.After completion of the reaction down to room temperature, centrifugation.The filtrate was concentrated, and concentrated to a solid for the next batch of this step applies masterbatch, distilled liquid with sodium hydroxide and dichloroethane made after the separation and reuse.

References:

Zhejiang Jiahua Chemical Co., Ltd.;Shi, Zien CN104003894, 2016, B Location in patent:Paragraph 0046

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