DEVICE SYSTEM AND METHOD FOR PREPARING CYCLIC CARBONATE BY DIOL ESTERIFYING CYCLIZATION
DEVICE SYSTEM AND METHOD FOR PREPARING CYCLIC CARBONATE BY DIOL ESTERIFYING CYCLIZATION
Provided are a device system and a method for preparing cyclic carbonate by diol esterifying cyclization. The device system comprises a reaction unit, a gas-liquid separation unit, and a refining unit which are connected in sequence; in the reaction unit, a nitrile compound is used as an auxiliary to synthesize cyclic carbonate by diol esterifying cyclization with CO; the reaction unit comprises any one of a fixed-bed reactor, a bubbling-bed reactor, or a fluidized-bed reactor; and a feeding/discharging method of liquid of the reaction unit comprises top liquid-feeding and bottom liquid-discharging, or bottom liquid-feeding and top liquid-discharging; the gas-liquid separation unit comprises a first separation device and a second separation device which are arranged in series; the refining unit comprises a light-component removal tower, a heavy-component removal tower, and a high-purity tower which are arranged in sequence. In the present application, a nitrile compound is used as an auxiliary to synthesize cyclic carbonate by efficient diol esterifying cyclization, which has the advantages of safe production process, high conversion, and simple operation, and provides a transformative new route for industrial preparation of cyclic carbonate.