What is crystallization?

Crystallization is the process of formation of solid crystals precipitating from either a solution or directly from a gas phase.

In other words, crystallization is defined as a process by which a chemical is converted from a liquid solution into a solid crystalline state. In industrial applications, the widespread use of crystallization due to the fact that crystallization acts as both a separation and purification step.

Needless to say, almost all chemical processes utilize at least one crystallization step (if not both). But crystalization itself is not a chemical reaction. The process of crystallization is actually a physical change.

In chemistry for example, recrystallization is a technique used to purify chemicals. By dissolving both impurities and a compound in an appropriate solvent, either the desired compound or impurities can be removed from the solution, leaving the other behind.

Crystallization occurs in two major steps, namely:

  1. Nucleation, and
  2. Crystal Growth

In nucleation, there is appearance of a crystalline phase from either a super-cooled liquid or a supersaturated solvent. Molecules gather together in clusters in a defined manner. These clusters need to be stable under experimental conditions to reach the “critical cluster size” or they tend to redissolve. It is at this point in the crystallization process that defines the crystal structure.

The second step, known as crystal growth, is the increase in the size of particles and leads to a crystal state. Here, the nuclei that have successfully achieved the “critical cluster size” begin to increase in size. Crystal growth is a dynamic process, with atoms precipitating from solution and becoming redissolved. Supersaturation and supercooling are two of the most common driving forces behind crystal formation.







  1. We need to get behind Renewable Natural Gas
  2. Difference between a Turbo and Positive Displacement Blower
  3. The Difference between Methane and Natural Gas
  4. First Dairy Biogas Project in Connecticut
  5. Does Renewable Natural Gas Have a Future in Energy?
  6. Biogas Offtake Opportunities For Digesters
  7. Wisconsin Dairy Begins Production of Renewable Natural Gas
  8. Anaerobic Digestion Sector Forming a Clearer Picture
  9. Brightmark to Expand Western New York Dairy Biogas Project
  10. Biogas - The Energy Wonder That's Under Our Noses
  11. Power Generation Achieved by a Self-Assembled Biofuel Cell
  12. Less Carbon Dioxide from Natural Gas
  13. Project Uses Renewable Electricity for RNG Production
  14. Smithfield Hog Farm Provides Natural Gas to Missouri City
  15. From Waste to Gas
  16. Gas Clash Threatens Australian Export
  17. Maximizing Opportunities of Anaerobic Digestion from Wastewater
  18. Catalyst to Speed up Conversion of Biomass to Biofuel
  19. How It Works: Ethanol
  20. Anaerobic Digestion - the Next Big Renewable Energy Source
  21. Anaerobic Additions
  22. Three (3) Tech Solutions for Modern Landfills
  23. The Costs and Benefits of Anaerobic Digesters
  24. Bacteria Farts Power Wastewater Plant in Fort Wayne
  25. Europe’s First Poultry Manure Biogas Plant
  26. Electricity Using Pig Manure
  27. $38-Million Biodigester coming to Grand Rapids
  28. Biochar Could Benefit Anaerobic Digestion of Animal Manure
  29. Getting More out of Anaerobic Digestion
  30. Biogas prevents 20 million tonnes of CO2 emissions per year


For additonal reading, please visit us at: News Worthy

Difference between a Turbo and Positive Displacement Blower