Reaction crystallizer

Abstract

Abstract In a reaction crystallizer provided at the upper portion thereof with a suspension zone and at the lower portion thereof with a classification zone, the said suspension zone comprises an outer mother liquor chamber adapted to separate a crystal slurry into a dense slurry and a clear mother liquor by virtue of the difference in specific gravity, a means for circulating a part of the clear mother liquor in the said mother liquor chamber into the classification zone, an inner circulation chamber enclosed within the said mother liquor chamber, a reaction chamber enclosed within the said circulation chamber and adapted to receive therein reactants being introduced, and a means for introducing air upwardly into the reaction chamber so as to circulate the dense slurry produced in the reaction chamber convectively and suspend the same between the said reaction chamber and the circulation chamber. On the other hand, the classification zone comprises a crystal discharge passage and a means for introducing air into the suspension zone. The fine crystals among the crystals produced in the suspension zone and falling into the classification zone are circulated and retained in the reaction chamber cooperatively by the clear mother liquor and air introduced into the classification zone so that, the crystals therein grow in a fixed size. Thus, only coarse crystals fall against the ascending current of said clear mother liquor and are discharged from the crystal discharge passage.

Inventors

• 👤 Toshio Kanai
• 👤 Masaaki Noguchi
• 👤 Hiroshi Yanagioka
• 👤 Yosio Kogawa
• 👤 Susumu Kondo

Bibliographic Details