QUANTITATIVE DETERMINATION BY IR SPECTROSCOPY OF THE CONVERSION OF UNSATURATED HYDROCARBONS AND THE YIELD OF PRODUCTS IN THE REACTION OF HYDROGEN-FREE HYDROGENATION Russian patent published in 2022 - IPC C07C5/03 G01J3/28 

FIELD: chemistry.

SUBSTANCE: invention relates to a method for quantifying the conversion of unsaturated aromatic or alicyclic hydrocarbons and the yield of their hydrogenation products in an anhydrous hydrogenation reaction using isopropanol. Determination of the conversion of the initial hydrocarbon and the yield of the final product is carried out by the method for IR-Fourier spectroscopy without stopping the reaction process in a cuvette for infrared spectroscopy with three-fold infrared scanning of the reaction mixture and determination of the quantitative content of isopropanol and acetone formed during the reaction in the frequency range of the spectrum 798-833 cm^–1 for isopropanol and 1640-1810 cm^–1 for acetone according to the formula applicable for the range of acetone concentrations in isopropanol from 1 to 55 wt. %: C_acetone (wt. %) = 0.19841 + 2.90645X – 0.03908X², where X is the numerical area ratio S_1640–1810/S_798–833, averaged by the sum of three measurement results.

EFFECT: possibility of quantifying simultaneously the conversion of unsaturated hydrocarbons (aromatic and/or aliphatic) and the yield of their hydrogenation products in an anhydrous hydrogenation reaction using isopropanol without stopping the reaction process by IR-Fourier spectroscopy in an IR cell, reducing the technical requirements for the equipment used and simplifying the entire procedure for quantitative analysis of the reaction mixture.

3 cl, 4 dwg, 4 tbl, 8 ex