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題名 | 負載型磷鎢異多體酸在烷基苯合成之應用研究=Application of Supported Tungsto-Phosphoric Acid on the Synthesis of Alkylbenzene |
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作者 | 吳榮宗; 張仁俊; 黃銘郁; 林建琛; | 書刊名 | 石油季刊 |
卷期 | 48:1 2012.03[民101.03] |
頁次 | 頁7-20 |
分類號 | 468.8 |
關鍵詞 | 負載型磷鎢異多體酸; 離子固體磷鎢異多體酸; 烷化; 烷基苯; Supported tungsto-phosphoric heteropoly acid; TPA; Supported ionic solid TPA; Alkylation; Alkylbenzene; |
語文 | 中文(Chinese) |
中文摘要 | 傳統之直鏈烷基苯合成方法係使用以液態酸為觸媒之均相催化反應,其中產生如設備腐蝕、產物分離及廢酸液處理等問題不易克服,目前此類製程已逐漸被固態酸觸媒製程取代。負載型異多體酸為一種固態強酸性觸媒,係將具有良好低溫烷化活性之磷鎢異多體酸負載於大孔洞高表面積之載體上,可有效應用於直鏈烯烴與苯之烷化反應。本研究主要是探討負載型觸媒中,擔體種類、異多體酸含浸量、鍛燒溫度,以及反應條件對烷化反應活性與選擇性之影響。由結果顯示,擔體以SiO2最適宜,較佳鍛燒溫度為275-375℃,較佳含浸量為50-60wt%,較佳反應條件為80℃/2hr,Cat.=2.7wt%,B/1-octene=10。實驗結果顯示,烷化反應活性與選擇性,似乎與異多體酸之Keggin結構無直接關聯性,而是與其不同結晶水所造成之不同酸性有關。另外,亦探討兩性化合物(Pyridinium Propyl Sulfobetaine, PPS)與異多體酸(HPA)之作用,形成具有強附著力之負載型離子固體異多體酸(Supported Ionic Solid HPA),並探討兩性化合物對異多體酸晶體結構及烷化活性之影響。 |
英文摘要 | The preparation of linear alkylbenzene was carried out conventionally in the homogeneous reaction system using liquid acid catalyst. However, the solid acid catalyst was used for the substitution of liquid catalyst recently for most of the industrial processes due to the problem of corrosion, product separation, and waste acid disposal. Supported heteropoly acid was a kind of solid superacid, which could be used effectively for the alkylation of benzene with linear olefin under lower reaction temperature. The effect of support, loading amount, calcination temperature, and the reaction conditions were investigated in this study. The results indicated that the optimal preparation of catalyst was 50~60 wt% heteropoly acid on the support SiO2 under the calcination of 275~375 ℃/2 hr. The optimal reaction conditions were found to be 80 ℃/2 hr, cat. = 2.7 wt%, B/1-octene = 10. The results also indicated that the activity and selectivity of alkylation were related to the crystal water content in the Keggin strucrure of heteropoly acid. The effect of zwitterionic compound Pyridinium Propyl Sulfobetaine (PPS) on the adhesive property, crystallinity and alkylation activity of Tungstophosphoric Heteropoly Acid (TPA) were also studied in this work. |
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