Abstract
ALKYLENE carbonates, or cyclic esters of carbonic acid and a,~-diols have come to be widely used in industry in recent years as highly efficient ~ lvents for high-molecular-weight compounds, in particular for forming polyaerilonitrile fibres [1-3]. In addition to their use as valuable solvents, extractants, and hydroxyalkylating agents, these compounds are the starting materials for the synthesis of monomers and high-molecular-weight compounds: glycol urethanes, vinylene carbonate, polyesters, polycarbonates, polyurea, polyvinylidene carbonate, polyvinylidene glycol, etc. [4-6]. The high chemical activity and other valuable properties of the alkylene carbonates, together with the availability of the raw material for their production, gives the prospect of their wide use in chemical industry. The simplest representative of the alkylene carbonates is ethylene carbon a t e t h e cyclic ester of carbonic acid and ethylene glycol. This compound can be synthesized by the interaction of ethylene oxide and carbon dioxide:
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