Oleophilicity

The skeleton of the molecule can be drawn showing an oleophilic hydrocarbon part, R, to which is attached a polar hydrophilic part, X ... 

Dispersants and detergents are surfactants in organic media and contain an oleophilic hydrocarbon part and a hydrophilic polar part. 

Other Properties. Polyester fibers have good resistance to uv radiation although prolonged exposure weakens the fibers (47,51). PET is not affected by iasects or microorganisms and can be designed to kill bacteria by the iacorporation of antimicrobial agents (19). The oleophilic surface of PET fibers attracts and holds oils. Other PET fiber properties can be found ia the Hterature (47,49). 

Although kaolins are easily wetted by both oil and water, surface treatment may sometimes be used to enhance the oleophilic properties. The kaolin in paint may represent 20—30% of the pigment. 

The type of oil-removing equipment used may be alum or caustic precoat coke filters, diatomaceous earth filters, or coalescing filters, sometimes employing oleophilic resins as oil strippers. Phenolic formaldehyde demulsifiers are also sometimes used. 

Esters of Q to Cn monocarboxylic acids [1288-1292], acid-methyl esters [1282], and polycarboxylic acid esters [1287], as well as oleophilic monomeric and oligomeric diesters [1293], have been proposed as basic materials for inverted emulsion muds. Natural oils are triglyceride ester oils [1844] and are similar to synthetic esters. Diesters also have been proposed [1293-1297]. 

Acetals and oleophilic alcohols or oleophilic esters are suitable for the preparation of inverted emulsion drilling muds and emulsion drilling muds. They may replace the base oils, diesel oil, purified diesel oil, white oil, olefins, and alkylbenzenes [825,826]. Examples are isobutyraldehyde di-2-ethylhexyl acetal dihexyl formal and mixtures with coconut alcohol, soya oil, and a-methyldecanol. 

Other base materials proposed are listed in Table 1-5. Quaternary oleophilic esters of alkylolamines and carboxylic acids improve the wettability of clay... 

Details of how to characterize barite have been worked out [64]. Barite can be modified to become oleophilic [1607,1608]. 

H. Muller, C. P. Herold, and S. von Tapavicza. Oleophilic alcohols as components of invert emulsion drilling fluids (Oleophile Alko-hole als Bestandteil von Inveit-Bohrspiilungen). Patent EP 391252, 1990. 

In colloid science, colloidal systems are commonly classified as being lyophilic or lyophobic, based on the interaction between the dispersed phase and the dispersion medium. In lyophilic dispersions, there is a considerable affinity between the two constituent phases (e.g., hydrophilic polymers in water, polystyrene in benzene). The more restrictive terms hydrophilic and oleophilic can be used when the external phase is water and a nonpolar liquid, respectively. In contrast, in lyophobic systems there is little attraction between the two phases (e.g., aqueous dispersions of sulfur). If the dispersion medium is water, the term hydrophobic can be used. Resulting from the high affinity between the dispersed phase and the dispersion medium, lyophilic systems often form spontaneously and are considered as being thermodynamically stable. On the other hand, lyophobic systems generally do not form spontaneously and are intrinsically unstable. 

Recovered water that contains a small amount of floating free product and dissolved constituent is usually passed through an oleophilic-hydrophobic adsorbent filter to remove the remaining... 

As already mentioned, some lubricants can be difficult to remove by washing and surfactants are often added to overcome this problem [463]. Lubricants can impair fastness properties, particularly those of disperse dyes. They may influence the uptake of dyes either positively or negatively, although seldom seriously except where it results in unlevelness. For example, knitting oils can increase the yield of relatively oleophilic reactive dyes on cotton and yet with highly hydrophilic types they may cause dye-resist effects [467]. 

---