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Mature chemical industry chain, green process to produce VC.

Technology introduction

(1)synthesis process of CEC: EC reacts with chlorine in the photolysis reaction tower under the catalysis of ultraviolet light. Excess chlorine and by-product hydrogen sulfide are sent to the hydrochloric acid absorption tower for tertiary absorption, and then neutralized with liquid alkali to control the concentration of waste gas under standard. CEC after reaction contains certain chlorine and hydrogen chloride. Nitrogen is used for stripping, and the stripping waste gas is sent to the hydrochloric acid absorption tower. Finally, hydrochloric acid and sodium hypochlorite are produced in by-products process.

(2)synthesis process of VC: DMC (dimethyl carbonate) was solvent and triethylamine as catalyst to remove hydrogen chloride in the reactor. After centrifugal filtration, the solution containing solid triethylamine hydrochloride enters the desolvention tower, crude distillation tower, distillation tower and crystallizer to obtain qualified products. 

Advanced technology, no exhausted waste water.

Technical advantages

(1)Advantages of synthesizing intermediate CEC technology:

◆ Equipped with external UV lamp, which is safe and reliable;

◆ Large feeding amount of the equipment;

◆ Fast reaction rate, good product quality and low chlorine consumption.

(2)Advantages of synthesizing product VC technology:

◆ It’s an unique product separation and purification technology with high separation yield and good product quality, which the risk of conventional technology separation is greatly reduced;

◆ It is exclusive in the industry since it adopted falling-film crystallization technology, which the investment is lower, the occupied space is smaller and crystallization yield is higher.


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Address:Fushan road No.388,Shanghai pudong district

Contact :(021) 5068 3979、18016058776

Email:lifang@dodgen.cn

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Address:Fushan road No.388,Shanghai pudong district
Contact :(021) 5068 3979、18016058776
Email:lifang@dodgen.cn