Chemicals property determination

摘要

A method of determining or predicting a value Px of a property of a material X, which is a feed to a process or a property of a product of a process from said material or yield of said process, which method comprises measuring the absorption Dix of said material at more than one wavelength in the region 600-2600 nm, comparing the said absorptions or a derivative thereof with absorptions Dim or derivatives thereof at the same wavelength for a number of standards S in a bank for which the said property or yield P is known, and choosing from the bank at least one standard Sm with property Pm said standard having the smallest average value of the absolute difference at each wavelength i between the absorption Dix (or derivative thereof) for the material and the absorption Dim (or derivative thereof) for the standards Sm to obtain Px, with averaging of said properties or yields Pm when more than one standard Sm is chosen, and wherein said process is at least one of polymerization, an oligomerization or an organic reaction in which at least one of the reactant and a product is a functionalized compound.