METHOD FOR PREPARING SOLID CARBAMIC ACID DERIVATIVES

摘要

The present invention relates to a method for preparing solid carbamic acid derivative powder which comprises a step of reacting liquid amine derivatives with carbon dioxides at -30 to 500 ? under 0.3 to 100 MPa. In addition, the invention relates to a method for reducing carbamic acid derivative powder with the liquid amine derivatives and carbon dioxides which comprises the steps of: dissolving the prepared carbamic acid derivative powder in a solvent; refluxing the resultant at 50 to 80 ?; and evaporating the solvent. The method for preparing a carbamic acid derivative powder according to the invention enables easy conversion into pure solid carbamic acid derivative powder without by-products and can remarkably reduce time and energy required for solidification by reacting carbon dioxides and amines with carbon dioxides in high pressure conditions without the use of a solvent. In addition, the prepared solid compounds can be used as a liquid amine substitute or used in a carbamic acid derivative form as necessary.