研究拟薄水铝石酸分散浆液的性质,考察加酸量和酸分散时间对拟薄水铝石酸分散浆液的酸分散指数的影响,并考察浆液中氧化铝含量、加酸量和酸分散时间对酸分散浆液黏度的影响.结果表明:酸分散指数随加酸量和酸分散时间的增加而增加,浆液黏度随加酸量、氧化铝含量、酸分散时间的增加而增加.在酸分散过程中存在凝胶化过程,这导致酸分散指数和黏度的变化趋势存在很大的不同.考察浆液性质对载体物性的影响.结果表明,提高浆液的酸分散指数可以增加载体的堆密度.选择优化的条件制备的球形氧化铝载体,其物化性能与工业载体相当,用其制备催化剂的催化性能达到了工业催化剂的水平.%The properties of pseudoboehmite slurry prepared by acid dispersion were studied. The effect of acid amount and dispersion time on the acid dispersion index and viscosity of the slurry was investigated. Results showed that under the testing conditions, both acid dispersion index and viscosity of the slurry increased with the increase of acid amount and dispersion time, besides,the viscosity also increased with the increase of alumina content in slurry. Since gelation happened during the acid dispersion process,the variation tendency for the acid dispersion index and viscosity was varied significantly. The effect of slurry properties on the properties of prepared catalyst support was also studied. It was found that the bulk density of the prepared support could be increased by improving the acid dispersion index of the slurry. Spherical support and catalyst prepared under the optimum conditions in lab exhibited similar physicochemical properties and catalytic performance as compared with the commercial support and catalyst.
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