[ghuraba_t]

I was wondering if anyone knew any manuals or resources that teach you different precipitation techniques and how to optimize them for maximum yield. The kind I am doing right now is just pouring the solution slowly into a stirring NaOH solution.

[P]

Depends what you are after. Dropwise addition into a swirlling conical flask should get you a fine fluffy powder. 

[P]

PS- if you collect the solution after it has been passed through the filter paper then pass it through again. Once you have some product built up it can act as an even finer filter paper and you might retain more product that has ppt'ed out in a finer particle size.

[DaveD]

Hi,

I can recommend the book Crystallization by J W Mullin.  It is a standard text on crystallization techniques.  Also if you have access to SciFinder a key researcher in this area is Allan Myerson at the Illinois Institute of Technology.

A lot of the work in this area has been done by chemical engineers (i.e., lots of equations); but there is plenty of qualitative information that chemists can readily use for their work.