METHOD OF PREDETERMINING AMOUNTS OF REACTANTS FOR A DESIRED PRODUCT

摘要

The optimum weight ratio of first and second reactants required to maximize the yield of product can be predetermined by: (a) determining the characteristic IR absorption of the functional groups of each reactant and that of the product from the respective IR spectra; (b) forming a first curve in which the reactant IR absorption ratio is plotted against the reactant weight ratio; (c) varying the weight ratio of the reactants in simulated small scale reactions and using the product characteristic IR absorption to plot a second curve in which the product IR absorption is plotted against the reactant weight ratio, thereby determining the reactant weight ratio necessary to produce the maximum amount of said product; (d) using the reactant weight ratio determined from the second curve, and determining from said first curve the optimum IR absorption ratio of the functional groups of said reactants; and (e) comparing the prior measured IR absorption ratio of the reactant mixture being charged with said determined optimum reactant IR absorption ratio, whereby the exact weight ratio of the reactants is measured before heating and, if necessary, corrected to produce the maximum amount of the product. Preferably, the first reactant is polyethoxypolypropoxy polybuloxydiamine, the second reactant is an alkenyl succinic anhydride. The product is an alkenyl succinimide, which is an ORI control additive.