On the basis of analyzing the nucleation and crystallization theory of carnallitite and KCl in the process of producing KCl,in addition,combining the producing actuality,we put forward a new theory of utilizing TDB crystallization technic to produce carnallitite and using speed control crystallization technic to produce quality KCl,and conduct the technical research.

Synthesize and properties of spherical cathode materials LiNi_(0.8)Co_(0.2)O_2 by controlled crystallization method;

Synthesis of the cathode materials LiNi_(0.8)Co_(0.2)O_2 for Li-ion batteries based on the controlled crystallization method;

The porous precursors(FePO4·xH2O)were prepared by controlled crystallization method,with Fe2(SO4)3,H3PO4 and NH3·H2O as raw materials.

The natural complex amino acids were prepared from the defatted double-low rapeseed meal as raw material through rapid hydrolysis by using sulfuric acid.

The aim is for research crystalgrowing condition of the aqueous solution crystalgrowing method to produce sodium metasilicate,sodium silicate reacts with sodium hydrate at heating condition,then to adjust mode number,evaporate and crystallize at 35～53 ℃ for 7～8 h.

In this paper we develop a new technological mechanism, process, equipments, products quality specification and the economic benefit of the aqueous solution crystalgrowing method to produce sodium silicate.