Central South University

Fenglong Sun

Zhongwei Zhao

Jiangtao Li

Xuheng Liu

Xingyu Chen

Zhichao Li

Muye Cui

Yongjin Luo

Lihua He

A method for crystallization of &#x3b2;-ammonium tetramolybdate includes: performing a stepwise pH-adjusting treatment of an ammonium molybdate solution via zoning to obtain the &#x3b2;-ammonium tetramolybdate. When feeding the ammonium molybdate solution into a reaction system from a first zone and then into second to sixth zones successively, pHof a resultant solution in the first zone is 7.0-6.0; pHof a resultant solution in the second zone is less than 6 and greater than or equal to 4; pHof a resultant solution in the third zone is less than 4 and greater than or equal to 2.5; pHof a crystallized slurry in the fourth zone is less than 2.5 and greater than or equal to 1; pHof a crystallized slurry in the fifth zone is 2.5-4.0; and pHof a crystallized slurry in the sixth zone is less than 2.5 and greater than or equal to 2.0.

Method for crystallization of &#x3b2;-ammonium tetramolybdate

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Changsha, China

Fenglong Sun