Linear primary alcohol ethoxylates

Linear Primary Alcohol Ethoxylates (LPAE). The hydrophobes of LPAE are made in several ways ... 

Figure 6. Suggested biodegradation pathway for hydrophobe of linear primary alcohol ethoxylates.

A C1215 essentially linear primary alcohol ethoxylate having an average of 9 ethylene oxide (EO) units per mole of alcohol (C12.15LPAE-9). The alcohol was prepared from Ci i.u olefins using catalytic addition of CO and H2. Approximately 80% of this alcohol contained linear alkyl chains. The 20% remaining contained 2-alkyl branches, mostly methyl. 

C12-15 linear, primary alcohol ethoxylate or equivalent, such as Neodol 25-9 (Shell). 

Surfactant critical micelle concentration (cmc) may be related to chemical structure using multiple correlation analysis. The cmc value plays an important role in surfactant adsorption, foaming, and interfacial tension properties. The 25 C cmc values of a series of high purity single component highly linear primary alcohol ethoxylates (Table 6) were analyzed using equation 4 ... 

The correlation equation obtained using the data summarized in Table 10 was 0.938. The modest correlation coefficient may be due to the use of commercial linear primary alcohol ethoxylates from two different manufacturers. Variatiofts in hydrophobe linearity, hydrophobe carbon number distribution about the average value, and EO chain length distribution about the average value were not considered in equation 8. This interpretation is supported by the observation that inclusion of data for three secondary (methyl branched at the alpha position of the hydrophobe) alcohol ethoxylates in the analysis resulted in a decrease of the correlation coefficient to <0.90. 

NEODOL 25-7, 25-9, 25-30, 25-45 (nonionic, linear primary alcohol ethoxylates)... 

Neodol 91-6 Linear primary alcohol. Ethoxylate Shell... 

Classification Linear primary alcohol ethoxylate Properties Nonionic... 

Classirication Linear primary alcohol ethoxylate Derinition PEG deriv. of undecyl alcohol Empiricai C17H36O4... 

The biodegradation pathways for AE have been studied extensively using linear, primary alcohol ethoxylates as the model [9,19-22], Fignre 1 depicts the three possibilities for initial point of attack ... 

Na LED3 A was evaluated for its ability to clear three different surfactant systems—sodium dodecylbenzene sulfonate, Cjj linear primary alcohol ethoxylate, and linear alkyl benzene sulfonate— in 5% sodium hydroxide. Two conventional hydrotropes, ammonium xylene sulfate and sodium alkanoate, were evaluated for comparison. The tests were carried out at 22°C and 70°C. The results are presented in Figures 14 and 15. 

Chem. Descrip. C12-C13 linear primary alcohol ethoxylate... 

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