@article{scholars7985,
          number = {4},
            note = {cited By 11},
             doi = {10.1080/00986445.2015.1023300},
         journal = {Chemical Engineering Communications},
           title = {Synthesis and optimization of 2-ethylhexyl ester as base oil for drilling fluid formulation},
          volume = {203},
       publisher = {Taylor and Francis Ltd.},
           pages = {463--470},
            year = {2016},
        keywords = {Catalysts; Drilling fluids; Esters; Oil well drilling; Rheology; Surface properties; Transesterification, Central composite designs; Commercial products; Hydrolytic stability; Optimum conditions; Reaction temperature; Response surface methodology; Rheological property; Trans-esterification methods, Well drilling},
        abstract = {A stable ester was synthesized to overcome the ester hydrolysis problem during the drilling of oil or gas wells using a conventional ester-based drilling fluid. The thermal and hydrolytic stability of the produced ester was high owing to the transesterification method employed in this study. The reaction was performed using 2-ethylhexanol and methyl laureate esters in the presence of sodium methoxide as a catalyst. In order to obtain the optimum synthesis conditions, a response surface methodology (RSM) was appraised based on the central composite design (CCD). The optimum conditions were determined as follows: 0.6 wt. catalyst, 70{\^A}oC reaction temperature, 1:1.5 molar ratio, and 11.5 min of reaction time. The results of 77 wt. 2-ethylhexyl ester (2-EH) illustrated a high agreement between the experimental and RSM models. The reaction product contained 77 wt. 2-EH and 23 2-ethylhexanol. The kinematic viscosity was 5mm2/s at 40{\^A}oC and 1.5mm2/sec at 100{\^A}oC; the specific gravity was 0.854, flash point was 170{\^A}oC, and pour point was -7{\^A}oC. The produced product showed similar properties to the available commercial product. However, it was observed that the mud formulation using the synthesized base oil had superior rheological properties at 121{\^A}oC. {\^A}{\copyright} Taylor \& Francis Group, LLC.},
            issn = {00986445},
          author = {Jassim, L. and Yunus, R. and Rashid, U. and Rashid, S. A. and Salleh, M. A. and Irawan, S. and Ghaemi, F.},
             url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84956924579&doi=10.1080\%2f00986445.2015.1023300&partnerID=40&md5=15122fd93f187be2dfb19c56aa1fe24e}
}