| 摘要 |
FIELD: chemical technology. ^ SUBSTANCE: invention describes a method for synthesis of pentaerythritol diphosphites with the high content of spiro-isomer. Pentaerythritol diphosphites are synthesized by a successive re-esterification method in the presence of monophosphite, and then in the presence of substituted phenol or other alcohol, and wherein indicated reactions of re-esterification are carried out under conditions of controlled temperature and pressure. The reaction conditions provide to synthesize intermediate derivative and final pentaerythritol diphosphite with the high content of spiro-isomer and the high total yield of diphosphites. ^ EFFECT: improved method of synthesis. ^ 26 cl, 1 ex |
