Crystallization from Solution
1962; Elsevier BV; Linguagem: Inglês
10.1016/s0065-2377(08)60057-5
ISSN2375-6756
AutoresC. S. Grove, Herbert Jelinek, Herbert M. Schoen,
Tópico(s)Chemical Thermodynamics and Molecular Structure
ResumoA complex and deep study of crystallization processes is required for growing crystals. Crystal studies are important in physics, biology, particularly in virology. Improvements in contemporary metallurgy and the chemical, ceramic, and other industries depend to a large extent on a thorough knowledge of crystallization processes. A crystal growing from an impure solution is itself much purer than the solution. This affords a practical method of obtaining solid chemicals in a pure form suitable for handling, storing, and marketing. The most important criteria of a crystallization process are product yield and purity. Crystallization is a process or unit operation of producing crystals or crystalline substances. It can occur from melts, solutions, or vapors. Crystalline solids need not be single crystals. Usually they are composed of an aggregate of crystals, which can be distinguished as separate entities under the microscope. Large crystals increase in size by a corresponding amount of solute. This is an important phenomenon in commercial crystallization. Equally important, sharp edges and corners of irregular solute masses also exhibit a tendency to dissolve and redeposit the plane surfaces. Thus, irregular solutes tend to grow into regular shapes or into homogeneous crystals.
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