Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of porous honeycomb alumina carrier with low linear shrinkage rate
The invention provides a preparation method of a low-linear-shrinkage porous honeycomb alumina carrier, which comprises the following steps: uniformly mixing pseudo-boehmite, alumina and a binder in a mass ratio of (1-4): 1, and putting the mixture into a kneading machine; the preparation method comprises the following steps: uniformly mixing water, a peptizing agent and a lubricating agent, putting the mixture into a kneading machine, and kneading, the mass of the water being 80-92.5% of the sum of the mass of the pseudo-boehmite and the mass of the aluminum oxide; aging the kneaded pug, and carrying out extrusion molding to obtain a honeycomb-shaped green body; and aging, drying and roasting the honeycomb-shaped green body to obtain the honeycomb-shaped alumina carrier. According to the present invention, the materials cooperate with each other, the pseudo-boehmite and the alumina are adopted as the raw materials, and the extrusion molding method is adopted to prepare the honeycomb alumina carrier, such that the cracking phenomenon does not exist during the drying process, and the obtained carrier has characteristics of low linear shrinkage rate, mesopore most probable aperture increasing, more macropore accumulation, and water absorption improving. And the method has the advantages of no introduction of impurities, simplicity, economy and environmental protection.
本发明提供一种低线性收缩率多孔蜂窝状氧化铝载体的制备方法，包括将拟薄水铝石、氧化铝和粘结剂混合均匀，放入捏合机中，拟薄水铝石和氧化铝的质量比为1‑4：1；将水、胶溶剂和润滑剂混合均匀，放入捏合机中，进行捏合，水的质量为拟薄水铝石与氧化铝质量之和的80‑92.5％；将捏合后的泥料进行老化，经挤出成型，获得蜂窝状坯体；蜂窝状坯体经老化，干燥、焙烧获得蜂窝状氧化铝载体。本发明通过各物质相互配合，以拟薄水铝石与氧化铝为原料，采用挤出成型的方法制备蜂窝状氧化铝载体，在干燥的过程中无开裂现象，所得载体具有低线性收缩率并提升了介孔最可几孔径，还堆积出了更多的大孔，提高吸水率。还具备不引入杂质，方法简单、经济环保的优势。
Preparation method of porous honeycomb alumina carrier with low linear shrinkage rate
The invention provides a preparation method of a low-linear-shrinkage porous honeycomb alumina carrier, which comprises the following steps: uniformly mixing pseudo-boehmite, alumina and a binder in a mass ratio of (1-4): 1, and putting the mixture into a kneading machine; the preparation method comprises the following steps: uniformly mixing water, a peptizing agent and a lubricating agent, putting the mixture into a kneading machine, and kneading, the mass of the water being 80-92.5% of the sum of the mass of the pseudo-boehmite and the mass of the aluminum oxide; aging the kneaded pug, and carrying out extrusion molding to obtain a honeycomb-shaped green body; and aging, drying and roasting the honeycomb-shaped green body to obtain the honeycomb-shaped alumina carrier. According to the present invention, the materials cooperate with each other, the pseudo-boehmite and the alumina are adopted as the raw materials, and the extrusion molding method is adopted to prepare the honeycomb alumina carrier, such that the cracking phenomenon does not exist during the drying process, and the obtained carrier has characteristics of low linear shrinkage rate, mesopore most probable aperture increasing, more macropore accumulation, and water absorption improving. And the method has the advantages of no introduction of impurities, simplicity, economy and environmental protection.
本发明提供一种低线性收缩率多孔蜂窝状氧化铝载体的制备方法，包括将拟薄水铝石、氧化铝和粘结剂混合均匀，放入捏合机中，拟薄水铝石和氧化铝的质量比为1‑4：1；将水、胶溶剂和润滑剂混合均匀，放入捏合机中，进行捏合，水的质量为拟薄水铝石与氧化铝质量之和的80‑92.5％；将捏合后的泥料进行老化，经挤出成型，获得蜂窝状坯体；蜂窝状坯体经老化，干燥、焙烧获得蜂窝状氧化铝载体。本发明通过各物质相互配合，以拟薄水铝石与氧化铝为原料，采用挤出成型的方法制备蜂窝状氧化铝载体，在干燥的过程中无开裂现象，所得载体具有低线性收缩率并提升了介孔最可几孔径，还堆积出了更多的大孔，提高吸水率。还具备不引入杂质，方法简单、经济环保的优势。
Preparation method of porous honeycomb alumina carrier with low linear shrinkage rate
一种低线性收缩率多孔蜂窝状氧化铝载体的制备方法
LU ANHUI (Autor:in) / XU HONGLIANG (Autor:in) / WU FAN (Autor:in)
31.05.2024
Patent
Elektronische Ressource
Chinesisch
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