| abstract |
The method of treating crude trimethylolpropane being a reaction product in an aqueous solution of n-butyraldehyde, formaldehyde and sodium hydroxide, from which sodium formate dissolved in the amount of about 5% by weight was eliminated by the reaction of salt exchange with sulfuric acid and the resulting distillation was distilled. the reaction of formic acid with the remaining water, characterized in that the crude trimethylolpropanoate prepared in this way is subjected to heating to a temperature of 190-200 ° C under a pressure of 4-13.3 kPa, which results in decomposition of the formate by-products formed by of trimethylolpropane with the evolution of carbon monoxide, ending when the formates are exhausted, after which the crude trimethylolpropane is subjected to high-vacuum distillation in the known manner to isolate the pure product. PL |