09-07-2020 дата публикации
Номер: WO2020140358A1
Автор:
HU, Jinxing,
WU, Xiaolin,
GAO, Haiming,
CHAI, Jinjian,
LI, Xiangkai,
SUN, Yujun
Принадлежит:
Disclosed is a method for preparing silica microspheres for an acidifier carrier, comprising the following steps: adding sodium silicate into a synthetic kettle, introducing steam while stirring and raising the temperature, adding water and stirring same to obtain a reaction base material A, adding sulfuric acid to the reaction base material A and acidifying same to a certain pH so as to obtain a reaction solution B into which sulfuric acid and sodium silicate are simultaneously added for a synthesis reaction to obtain a reaction solution C; then stopping the addition of sodium silicate, adding sulfuric acid alone for post-acidification until a certain pH, and curing same to obtain a dilute slurry D; and subjecting the dilute slurry D to filtration, washing, slurrying, thickening, and drying, thereby obtaining the silica microspheres for an acidifier carrier. The silica microspheres thus prepared have a uniform particle size, are difficult to break, do not agglomerate, have a fast adsorption ...
Подробнее
