DEVELOPMENT OF RATIONAL TECHNOLOGY FOR SODIUM GLYCEROXIDE OBTAINING

Abstract

The process of sodium glycerox- ide obtaining by the reaction of glyc- erol and sodium hydroxide in the form

of an aqueous solution was investi- gated.

Glycerol salts (metal glycerox- ides) are important components in

the synthesis of many compounds. Glyceroxides are used in the chemical

industry, construction, medical prac- tice, etc. Glyceroxides of alkali metals

are used in the production of modified fats and biodiesel fuel. P.a.-grade glycerol (CAS Number

56-81-5) was used with a mass frac- tion of the main substance of 99.5 %.

The parameters of sodium hydroxide

(CAS Number 1310-73-2) were stud- ied: the mass fraction of the main sub- stance is 98.0 %, the mass fraction of

sodium carbonate is 0.5 %. Rational conditions for sodium

glyceroxide obtaining were deter- mined: temperature (145 °C) and

concentration of sodium hydroxide

solution (65 %). Under these condi- tions, the mass fraction of the main

substance in the product was 80 %. The melting point (72 °C) and mass

fraction of moisture (0.3 %) in sodi- um glyceroxide were determined. The

catalytic activity of the product in the process of transesterification of palm olein was tested. The increase in the melting point of palm olein was 15 °C. Under similar conditions of using potassium glyceroxide with a mass fraction of the main substance

of 75.77 %, the increase in the melt- ing point is 12.1 °C. This indicates an

increase in the efficiency of the trans- esterification process using sodium

glyceroxide obtained by the devel- oped technology.

The research results make it pos- sible to produce sodium glyceroxide

under rational conditions with a high mass fraction of the main substance

at enterprises that use metal glycer- oxides as a production component or

commercial product. The determined

rational conditions will make it pos- sible to effectively use the company's

resources and predict