Mixtures wide-boiling-point-range

High-speed separations of wide-boiling-point-range mixtures require fast temperature programming. However, if the programming rate is too high, a serious... 

The PTV injector (programmable temperature vaporizer, also called multimode inlet) with split or splitless operation is based on the systematic work of Vogt (1979), Poy (1981) and Schomburg (1981) (Figures 2.65 and 2.66). In particular, emphasis was placed on the precise and accurate execution of quantitative analyses of complex mixtures with a wide boiling point range (Poy, et al., 1981,... 

The reliability or stability of a method covers its ability to reach a solution for a wide group of problems in a general range of mixtures, such as wide or narrow boiling, and if it can solve columns across the whole spectrum of boiling point ranges. It also covers the ability of the method to solve the same column with variations in some of the specifications such as number of trays, reflux ratio, or feed conditions. 

Although the process of fractionating complex mixtures can be outlined mathematically for certain simplified situations, the practical application of such computations is not satisfactory because vapor-liquid equilibrium data are inadequate, because human patience is tried to the point of frequent errors by the laboriousness of the computations, and because the assumption of equal molal latent heats should not be made for wide-boil-ing-range mixtures. The first data that must be had are the compositions of the products that are to be produced, and ordinarily these compositions cannot be wisely selected by the designer because they are fixed by the... 

Olex A version of the Sorbex process for separating olefins from paraffins in wide-boiling mixtures. It can be used for hydrocarbons in the range C6 - C20. Based on the selective adsorption of olefins in a zeolite and their subsequent recovery by displacement with a liquid at a different boiling point. Mainly used for extracting Cn - C14 olefins from the Pacol... 

Reactants A and B and the reaction mixtures have a negligible vapour pressure below Texo- The solvent D that is used in case 2 is chemically inert over a wide temperature range for the reaction concerned, it has a high boiling point Ts (> 180°C) and is thermally stable at temperatures up to and over 200°C. 

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