RODNEY A CERNY
Engineering in Cleveland, OH
License number
Massachusetts 27625
Issued Date
Dec 6, 1974
Expiration Date
Jun 30, 1986
Type
Civil Engineer
Address
Address
Cleveland, OH 44130
Professional information
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Controlled Temperature Purification Of Aqueous Sodium Hydroxide Solution
Controlled Temperature Purification Of Aqueous Sodium Hydroxide Solution
US Patent:
4251490, Feb 17, 1981
Filed:
Jun 13, 1979
Appl. No.:
6/048061
Inventors:
Rodney A. Cerny - Parma Heights OH
Robert P. Dolesh - Westlake OH
Robert P. Dolesh - Westlake OH
Assignee:
The H. K. Ferguson Company - Cleveland OH
International Classification:
C01D 104
US Classification:
423179
Abstract:
Methods and apparatus are disclosed for enhanced purification of caustic soda solutions. In place of conventional mechanical separators, flotation separation methods are taught utilizing sequential multi-temperature sparging gas treatments. A first stage treatment, at about 70. degree. F. -90. degree. F. , provides separation of sodium chloride and a subsequent stage, higher temperature (about 90. degree. F. -100. degree. F. ) treatment provides enhanced removal of suspended sodium sulfate. Sensible heat is added to sparging gas to offset the cooling effect of gas expansion in a treatment tank and avoid crystallization of dissolved impurities from saturated solutions on sparging gas nozzles.