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Preparation of Pseudo-boehmite and y-Al_2O_3 Support by Neutralization of NaAlO_2 Solution with CO_2 被引量:2
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作者 Yang Qinghe Liu Bin +3 位作者 Li Dadong Shi Yahua Nie Hong Kang Xiaohong(Research Institute of Petroleum Processing, SINOPEC,Beijing, 100083) 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2003年第1期47-51,共5页
Pseudo-boehmite (PB) and γ-Al2O3 support are prepared by neutralization ofNaAlO2 solution with CO2(mixed gases) on bench scale. PB, typically loosely packed, fibrous particle/aggregate, is obtained by adjustingconcen... Pseudo-boehmite (PB) and γ-Al2O3 support are prepared by neutralization ofNaAlO2 solution with CO2(mixed gases) on bench scale. PB, typically loosely packed, fibrous particle/aggregate, is obtained by adjustingconcentration and flow rate of CO2 and concentration of NaAlO2 solution at a pH level lower than that commonlyassumed during neutralization. After calcination at different temperatures, γ-Al2O3 supports with different pore vol-ume and different pore size are prepared at different conditions. 展开更多
关键词 sodium meta-aluminate solution carbon dioxide PSEUDO-BOEHMITE γ-aluminasupport PREPARATION
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Influence of Setting Accelerating Agents on Properties of Colloidal Alumina Bonded Corundum Castables
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作者 ZHANG Xiaohui YU Xingguo +1 位作者 WANG Baoyu ZHU Boquan 《China's Refractories》 CAS 2020年第1期31-35,共5页
In order to improve the flow ability and early-stage strength of colloidal alumina bonded corundum castables,the colloidal alumina with 20%of solid content was used as the binder,and tabular corundum aggregates and fi... In order to improve the flow ability and early-stage strength of colloidal alumina bonded corundum castables,the colloidal alumina with 20%of solid content was used as the binder,and tabular corundum aggregates and fines,and active alumina micropowder CL370 as the main starting materials.Influences of setting accelerating agents(magnesia fines and sodium meta-aluminate)on the linear change rate,the modulus of rupture and the microstructure of corundum castables after different heat-treatments were researched.The results show(1)cement bonded corundum castables have the highest modulus of rupture after 24 h of demolding,and colloidal alumina bonded corundum castables have the lowest one;both magnesia fines and sodium meta-aluminate can improve the strength after 24 h of demolding;(2)after firing at 1000℃for 3 h,the modulus of rupture of all specimens decreases,even lower than that after 24 h of demolding;(3)after firing at 1600℃for 3 h,the castable specimen added with 0.1 mass%magnesia fines has the highest modulus of rupture;the tabular phases appear interwovenly in the specimen;(4)taking the comprehensive properties into account,0.1 mass%of magnesia fines is appropriate,and the addition of sodium meta-aluminate shall be lower than 0.3%. 展开更多
关键词 CORUNDUM COLLOIDAL ALUMINA SETTING accelerating agent magnesia FINES sodium meta-aluminate
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