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Synthesis, Characterization of Mesoporous Al-Mg Composite Oxide and Catalytic Performance for Oxyethylation of Fatty Alcohol |
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| Authors: | SONG Wei-ming DENG Qi-gang ZHOU De-rui ZHAO De-feng |
| Affiliation: | 1. State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116012, P. R. China; 2. College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, P. R. China; 3. College of Science, Harbin Institute of Technology, Harbin 150001, P. R. China |
| Abstract: | A mesoporous Al-Mg composite oxide with a hexagonal structure was synthesized with aluminium nitrate and magnesium nitrate as the reagents and sodium dodecyl sulfate(SDS) as the template in the presence of ethylenediamine. The XRD, nitrogen adsorption-desorption and TEM studies indicate that the composite has a hexagonal framework structure and an average pore diameter of 2.6 nm. The TG/DTA spectra indicate that the decomposition and the removal of the occluded surfactant of the sample take place in a range of 230-550 ℃. The mesoporous Al-Mg composite oxide exhibites a highly catalytic activity for the oxyethylation of fatty alcohols. Narrow-range distributed ethoxylates are formed in the presence of the mesoporous Al-Mg composite oxide catalyst. The distribution selectivity coefficient(Cs) is 24 when the mesoporous Al-Mg composite oxide was used as a catalyst for the oxyethylation of octanol and the average adduct degree of ethoxylates is 6.4. |
| Keywords: | Mesoporous Al-Mg composites oxide Characterization Oxyethylation Narrow-range distribution |
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