拟薄水铝石路径热油柱成型制备毫米级氧化铝小球的研究
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摘要
研究了高纯度拟薄水铝石粉与酸溶液胶溶制备氢氧化铝溶胶,再经热油柱成型制备毫米级氧化铝小球方案的可行性。通过优化原料、胶溶剂与胶凝剂三者之间的比例,所制备的氧化铝球压碎强度高于50 N/粒、堆密度为0.55～0.63 g/mL,经650℃、10%水蒸气处理50 h后比表面积维持在155 m~2/g以上。与现有工业成球工艺相比,本方案流程更加简单、环境友好,将所制氧化铝小球作为载体制备的Pt-Sn/γ-Al_2O_3催化剂的石脑油重整性能达到了工业催化剂的水平。
The feasibility of alumina sphere formation through hot oil-drop method with high purity pseudo-boehmite was investigated.By optimizing the ratios of raw material,peptizer and gelling agent,the crushing strength of alumina pellets prepared was higher than 50 N/pellet,the bulk density was 0.55—0.63 g/mL,and the specific surface area was maintained above 155 m~2/g after 650 ℃ and 10% water vapor treatment for 50 h,meeting the demand of new continuous catalytic regeneration(CCR)catalyst.Compared with the existing industrial pelleting technology,the process of this scheme is simpler and is more environmentally friendly.The naphtha reforming performance of the Pt-Sn/γ-Al_2O_3 catalyst prepared by the new technique has reached the level of industrial catalyst.
The feasibility of alumina sphere formation through hot oil-drop method with high purity pseudo-boehmite was investigated.By optimizing the ratios of raw material,peptizer and gelling agent,the crushing strength of alumina pellets prepared was higher than 50 N/pellet,the bulk density was 0.55—0.63 g/mL,and the specific surface area was maintained above 155 m~2/g after 650 ℃ and 10% water vapor treatment for 50 h,meeting the demand of new continuous catalytic regeneration(CCR)catalyst.Compared with the existing industrial pelleting technology,the process of this scheme is simpler and is more environmentally friendly.The naphtha reforming performance of the Pt-Sn/γ-Al_2O_3 catalyst prepared by the new technique has reached the level of industrial catalyst.
引文
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[12] 潘红年,朱玉霞,林伟,等.拟薄水铝石的胶溶能力[J].石油学报(石油加工),2010,26(2):195-200
[2] 马爱增,潘锦程,杨森年,等.低积炭速率连续重整催化剂的研发及工业应用[J].石油炼制与化工,2012,43(4):15-20
[3] Ismagilov Z R,Shkrabina R A,Koryabkina N A.Hydrocarbon-ammonia moulding:A new technology for producing of combustion catalysts[J].Korean J of Chem Eng,1997(3):153-161
[4] Ismagilov Z R,Shepeleva M N,Shkrabina R A,et al.Interrelation between structural and mechanical characteristics of spherical alumina gragules and the initial hydroxide properties[J].Applied Catalysis,1991,69:65-73
[5] Shepeleva M N,Shkrabina R A,Fenelonov V B,et al.Production of spherical granules of alumina with controlled porous structure [J].Applied Catalysis,1991,78:175-184
[6] 石油化工科学研究院.铝溶胶法油柱成型制备γ-A12O3小球担体的研究[J].石油炼制,1983(5):31-37
[7] 殷福珊,姚振兴,朱锡如,等.大孔γ-A12O3小球的制备[J].石油化工,1982,11(1):7-13
[8] 王国成,马爱增.拟薄水铝石酸分散浆液性质的研究[J].石油炼制与化工,2011,42(5):31-35
[9] 刘建良,潘锦程,马爱增.胶溶条件对拟薄水铝石酸分散性及成球性能的影响[J].石油炼制与化工,2012,43(5):40-44
[10] 刘杰,朱慧红,孙素华,等.不同胶溶剂对活性氧化铝载体的影响[J].辽宁化工,2007,36(11):730-732
[11] 刘智信,李东风.氧化铝溶胶的制备[J].硅酸盐通报,2004(4):73-75
[12] 潘红年,朱玉霞,林伟,等.拟薄水铝石的胶溶能力[J].石油学报(石油加工),2010,26(2):195-200