| abstract |
The invention discloses a method for preparing hexagonal lanthanum hydroxycarbonate by hydrothermal synthesis, comprising: in a precipitation reaction kettle, diluting a lanthanum chloride solution with deionized water as a bottom liquid, adding lanthanum carbonate as a crystal seed; Flow precipitation method, add feed liquid and precipitant to the precipitation reaction kettle, and generate lanthanum carbonate after the precipitation reaction; take out the precipitate lanthanum carbonate in the precipitation reaction kettle, filter and dry to obtain lanthanum carbonate as the precursor; The ionized water is added to the reactor, and the temperature is controlled at 110 to 160 ° C and stirred to carry out the hydrothermal synthesis reaction, and the holding time is 6 to 20 hours; the final product obtained is washed with deionized water and then suction filtered or centrifuged to obtain a white solid, The white solid was placed in an oven, and dried at 150-200° C. to obtain hexagonal lanthanum hydroxycarbonate. The invention has a simple production process and is suitable for industrialized batch production of hexagonal lanthanum hydroxycarbonate. |