The invention discloses an automobile
tail gas purification catalyst carrier and a preparation method thereof. The
impurity Na content in the automobile
tail gas purification catalyst carrier is lowerthan 400ppm; the
apparent density is 1.8g / L or higher; the specific surface area at 950 DEG C at 2h is 110m<2> / g or higher; the pore volume is 0.4ml / g or higher. According to a preparation method,
sodium aluminate /
potassium aluminate are used as raw materials, and
nitric acid, modification agents and surfactants are used as auxiliary materials;
coprecipitation, aging, filtering washing,
drying,
roasting and crushing are performed; then, modified aluminum
hydroxide or aluminum
oxide is used as raw materials, surfactant and
oxidizing agent containing modified aluminum
hydroxide or aluminum
oxide slurry is used as substrate materials; precipitators and modification agents are jointly sprayed into a bottom solution for
precipitation; after the
precipitation, aging, filtering washing, materialmixing,
drying,
roasting and crushing are performed to obtain the composite modified automobile
tail gas purification catalyst carrier of composite modification aluminum
oxide; the contents of impurities Na, S, P and the like are low; the requirements of the automobile tail gas purification agent carrier can be met.