Synthesis and Properties of Organobentonites
Wang Zhong, Li Yunkang, Chen Defang
(Xi'an Jiaotong University, Xi'an 710049, China)

Abstract: The organobentonites are synthesized by means of the ionexchange reaction between quaternary ammonium salts and sodium base bentonites. They exhibit excellent dispersity and thixotropy in organic medium and can be obtained with controlling reaction temperature (55deg¡«65deg) and reaction time (90 min)£¬using sulphoacid as an activator, reacting between bentonite mortar treated by sodium salts and quaternary ammoniumsalts before filtering, washing and drying reaction products. The work provide useful information for processing products such as thickeners for paint, printing ink, lubricating oil and oil mortar for well drilling.
Keywords: organobentonite;quaternary ammonium salt; wet process; ionexchange reaction

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