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恒輝化工

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氧化鋁載體催化劑、制備及用途

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2021-07-08

來(lái)源：

氧化鋁載體催化劑在烴類(lèi)的許多轉換反應中使用。它們可以在固定床反應器,移動(dòng)床反應器或循環(huán)流化床反應器中使用。在所有這些反應床使用中，催化劑耐磨耗是重要的。在固定催化劑床裝填期間,催化劑的破碎可能是相當明顯的，而在移動(dòng)床或循環(huán)流化床反應器中，催化劑必須是耐磨耗的。催化劑粒子的形狀可以變化，但是為了得到裝填均勻的催化劑床，催化劑粒子最好是為球形。制備球形氧化鋁催化劑的便利的方法是油滴法，在這個(gè)方法中,氧化鋁水溶膠滴和膠凝劑通過(guò)熱的油浴。用油滴法從氧化鋁的水合物制備高密度和高壓碎強度的球形氧化鋁的方法公開(kāi)在美國專(zhuān)利(專(zhuān)利號為4542113)和該專(zhuān)利提出的權利要求書(shū)中，該方法包括使用特定特性的氧化鋁溶膠，再把尿素混入該溶膠中。催化劑除了高度的耐磨耗外，對某些特定的應用，人們希望催化劑要具有低的堆裝密度。催化劑的堆裝密度低，必定意味著(zhù)催化劑具有較多的孔結構，從而一-般均導致催化劑活性的提高。

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