METHOD FOR PREPARING QUATERNARY AMMONIUM HYDROCARBONATES AND QUATERNARY AMMONIUM CARBONATES (VARIANTS) Russian patent published in 2007 - IPC C07C211/63 C07C209/20 

FIELD: chemical technology.

SUBSTANCE: invention relates to a method for preparing quaternary ammonium methocarbonate of the formula: (CH₃NR¹R²R³)⁺(OCO₂CH₃)^- wherein R¹ and R² represent independently (C₁-C₃₀)-alkyl; R³ represents (C₈-C₃₀)-alkyl, and to a method for preparing quaternary ammonium hydrocarbonate of the formula: (CH₃N⁺R¹R²R³)₂CO₃H^- wherein R, R² and R³ represent independently (C₁-C₃₀)-alkyl, and to a method for preparing a mixture of quaternary ammonium hydrocarbonate and quaternary ammonium carbonate wherein quaternary ammonium cation means the formula: N⁺(CH₃)R¹R²R³ wherein R¹, R² and R³ represent independently (C₁-C₃₀)-alkyl. Method for preparing quaternary ammonium methocarbonate involves reaction of amine of the formula: NR¹R²R³, cyclic carbonate of the formula: wherein R⁴ represents hydrogen atom or (C₁-C₄)-alkyl; n means a whole number from 1 to 10 and methanol in the molar ratio of amine to cyclic carbonate from about 1:1 to about 1:10. Method for preparing quaternary ammonium hydrocarbonate involves preparing quaternary ammonium methocarbonate by the abovementioned method and conversion of quaternary ammonium methocarbonate to quaternary ammonium hydrocarbonate by hydrolysis. Method for preparing a mixture of quaternary ammonium hydrocarbonate and quaternary ammonium carbonate involves preparing quaternary ammonium methocarbonate by the abovementioned method and conversion of quaternary ammonium methocarbonate to a mixture of quaternary ammonium hydrocarbonate and quaternary ammonium carbonate.

EFFECT: improved preparing method.

17 cl, 22 ex