Separators properties

Separation method Characteristic properties Separation principle Separation agent Industrial appHcation... 

Discrimination between the enantiomers of a racemic mixture is a complex task in analytical sciences. Because enantiomers differ only in their structural orientation, and not in their physico-chemical properties, separation can only be achieved within an environment which is unichiral. Unichiral means that a counterpart of the race-mate to be separated consists of a pure enantiomeric form, or shows at least enrichment in one isomeric form. Discrimination or separation can be performed by a wide variety of adsorption techniques, e.g. chromatography in different modes and electrophoresis. As explained above, the enantioseparation of a racemate requires a non-racemic counterpart, and this can be presented in three different ways ... 

Molecular characteristic Physical property Separation technique... 

The unusual combination of release and antagonism of noradrenaline has been noted above, while another property separating oxypertine from other major tranquillizers is that it does not potentiate the analgesia produced by morphine or pethidine [161]. The compound is anti-emetic and weakly antihistaminic [160-2]. 

After experimentation and calculation of a model, a relation is established between each formulation property separately and the variables in the employed model. When a model adequately describes this relation, predictions of this property can be made by interpolation over the whole range of the boundary values of the used variables, which forms the response surface. In Figure 4.12 the relation between the crushing strength and mixtures of three components (where the factor space can be represented by a triangle) is presented by a contour plot. The composition that gives a desired criterion value can be read directly fi-om the figure. 

Depression associated with panic attacks may benefit from the combination of an antidepressant-anxiolytic or the use of an SSRI (e.g., fluoxetine or paroxetine), which may have antipanic properties separate from their antidepressant effects. 

The defining characteristic of ideal gas mixtures is the absence of any interactions. Thus, all thermodynamic properties separate into their partial contributions for example,... 

The phenols are in many ways similar to alcohols of aliphatic structures where the hydroxyl group is attached to a chain of carbons. The phenolic hydroxyl group, however, is influenced by the presence of the aromatic ring. Because of the aromatic ring, the hydrogen of the phenolic hydroxyl is labile, which makes phenols weak acids. We will deal with their chemical properties separately in Chapter 2. 

Analytical Properties Separation of close-boiling disubstituted benzenes Reference 1... 

Analytical Properties Separation of ethyltoluenes, chlorotoluenes, bromotoluenes, and dichlorobenzenes also, ethylbenzenes from xylenes and propylbenzenes from ethylbenzenes Reference 3... 

Analytical Properties Separation of chlorinated biphenyls Reference 4... 

Analytical Properties Separation of meta- and para-xylene in nematic region Reference 5... 

Analytical Properties Separation of positional isomers of aromatic hydrocarbons Reference 7... 

Melting range -> 114-136°C Nematic -> isotropic >306°C Analytical Properties Separation of substituted xylenes Reference 9... 

Analytical Properties Separation of substituted xylenes Reference 9... 

Analytical Properties Separation of 1- and 2-ethylnaphthalene baseline separation of pyrazines Reference 12... 

Solid -> smectic 101.5°C Smectic -> nematic 137°C Nematic -> isotropic 151,5°C Analytical Properties Separates diethylbenzene isomers Reference 13... 

Analytical Properties Separation of dimethylbenzene isomers, dihalobenzene isomers (Cl, Br), haloketone benzene isomers, dimethoxybenzene isomers Reference 14... 

Analytical Properties Separation of disubstituted benzene isomers Reference 15... 

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