References glycol dehydration

Almost all field gas dehydration units use triethylene glycol for the reasons indicated. Normally when field personnel refer to glycol they mean triethylene glycol and we will use that convention in the remainder of this chapter. 

Pre-treatment of the SC with oleic acid and propylene glycol resulted in the appearance of two new transitions at -5 and -12 C, with no evidence of the peak at -9 C. Because the profiles appeared similar for both the hydrated and dehydrated samples, this peak cannot be related to water. The peak at -12 C, was attributed to the formation of an eutectic mixture between the oleic acid and the stratum comeum and the peak at -5 C was due to excess oleic acid. The peak at -9 °C is thus assigned to lipids and because of its occurrence at below 0 °C is referred to as the sub-zero lipid peak [3]. 

Since the calculated free energy of interaction is largely dependent on the value chosen for Xi, then evidence of the effect of salts on Xi could lead to significant conclusions on the stability of emulsions in the presence of salts. Several reports of non-ionic surfactants and polyethylene glycols bear out the contention that electrolytes dehydrate the ethylene oxide chains and promote their salting out . This is what the study of the effect of NaCl and Nal referred to earlier (see Fig. 8.3) aimed to display-that salting in and salting out would have an effect on stability as predicted by Equation 8.30. 

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