Abstract
Magnesium hydroxide can be prepared by treating desulfated bittern with milk of lime, caustic soda solution etc. it is obtained usually in a colloidal- like state as other metal hydoxides. To increase the particle size is, therefore, the most important requirement of the preparation. it is recognized that in the so-called continuous type of reaction, the pH of the solution varies considerably about 100% equivalet accompanying with great difference in the particle size, and the average size reaches more than 30, in the stable continuous state when the solution is kept strictly on the optimum pH The fact may be explained briefly by theory of crystal growth, and it can be concluded that the most rational method of the preparation is to keep the solution the optimum pH in the socalled continuous type of reaction.
