Type and Concentration Effects of some Active Ingredients on the Performance of Bentonite Lubricant Grease

Volume 16 , Issue 1 , December 2014 , Pages 15-22

Authors

¹ Collage of Basic Education, Salah Aldin University

² Petroleum Engineering Department, University of Technology

Optimization study was carried out on the materials used in preparation of lubricant grease

prepared from bentonite. This study included the selection of the optimum type and percent of

quaternary ammonium salts to convert the bentonite from hydrophilic to organophilic; tetraethyl

ammonium chloride and tetraethyl ammonium bromide were used for this purpose. It was seen that

the quaternary ammonium chloride gave the best results because of the high tendency of calcium

ion to react with chloride ion than that with bromide ion; over more it gave a less swelling.

The effect of treated bentonite added in different percentage on the penetration point, NLGI

(National Lubricating Greases Institute number), drop point, and water resistance of the prepared

grease was studied. It was seen that by increasing the percentage of added organophilic bentonite

with the prepared grease caused a decrease in the penetration point which is correspond to increase

in the consistency of stiffness of grease. These results were in agreement with the NLGI

classification system. It was noticed that by increasing the percentage of added organophilic

bentonite in the prepared grease caused an increase in the dropping point and in the degree of

water resistance.

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