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Citation: CAO Chong-Jiang, LIU Xiao-Geng, ZHOU Guo-Xin. Esterification Pretreatment of High Acid Value Oil With Solid Acid Catalysts[J]. Chinese Journal of Applied Chemistry, ;2008, 25(5): 613-616. shu

Esterification Pretreatment of High Acid Value Oil With Solid Acid Catalysts

1.
Department of Applied Chemistry, Nanjing University of Finance and Economics, Nanjing 210003

Corresponding author: CAO Chong-Jiang,
Received Date: 20 May 2007
Available Online: 10 August 2007
Fund Project: 江苏省高校自然科学基金(07KJD530075) (07KJD530075)南京财经大学科研基金(B0613)资助项目 (B0613)

Gallium- and aluminum-promoted sulfated zirconia catalysts were prepared by hydrolysis,digestion,wetness impregnation and calcination.The surface acid properties of these catalysts were studied.The high acid value oil was pretreated by esterification on these promoted catalysts.The effects of calcining temperature,molar ratio of methanol to oil were analyzed.The experiment results show that these catalysts exhibit excellent catalytic activities.Under the following conditions:methanol/oil mole ratio 30,amount of catalyst 4%,reaction time 8 h,reaction temperature 67℃,the esterification rate on Ga₂O₃/SO₄^2-/ZrO₂ calicined at 600℃ was the highest and the acid value of oil decreased to 4.1,which had a good effect on producing biodiesel by transesterification in the presence of alkaline catalyst.
- solid acid,
- pretreatment,
- esterification
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