Process for the production of aragonite crystals
First Claim
1. A PROCESS OF PRODUCING THE ARAGONITE CRYSTAL FORM OF CALCIUM CARBONATE BY REACTING LIME AND SODIUM CARBONATE, WHICH COMPRISES PREPARING AN AQUEOUS SLAKED LIME SLURRY, INTRODUCING SODIUM CARBONATE AS A CONTINUOUS STREAM INTO SAID SLURRY WITH CONSTANT AGITATION OF THE REATION MIXTURE TO RAPIDLY DISPERSE THE SODIUM CARBONATE IN SAID SLURRY AND AVOID THE FORMATION OF LOACLIZED AREAS OF OVERCONCENTRATION, MAINTAINING THE TEMPERATURE OF THE REACTION MIXTURE BETWEEN ABOUT 150*F. AND THE ATMOSPHERIC BOILING POINT OF THE REACTION MIXTURE, THE REACTANTS PROVIDED IN AMOUNTS SUFFICIENT TO PRODUCE A CONCENTRATION OF ABOUT 120-250 GRAMS PER LITER OF SODIUM HYDROXIDE, AND RECOVERING THE ARAGONITE CRYSTALS OF CALCIUM CARBONATE FORMED AS SINGLE NEEDLELIKE PARTICLES AND NEEDLE CLUSTERS.
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Accused Products
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1 Claim
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1. A PROCESS OF PRODUCING THE ARAGONITE CRYSTAL FORM OF CALCIUM CARBONATE BY REACTING LIME AND SODIUM CARBONATE, WHICH COMPRISES PREPARING AN AQUEOUS SLAKED LIME SLURRY, INTRODUCING SODIUM CARBONATE AS A CONTINUOUS STREAM INTO SAID SLURRY WITH CONSTANT AGITATION OF THE REATION MIXTURE TO RAPIDLY DISPERSE THE SODIUM CARBONATE IN SAID SLURRY AND AVOID THE FORMATION OF LOACLIZED AREAS OF OVERCONCENTRATION, MAINTAINING THE TEMPERATURE OF THE REACTION MIXTURE BETWEEN ABOUT 150*F. AND THE ATMOSPHERIC BOILING POINT OF THE REACTION MIXTURE, THE REACTANTS PROVIDED IN AMOUNTS SUFFICIENT TO PRODUCE A CONCENTRATION OF ABOUT 120-250 GRAMS PER LITER OF SODIUM HYDROXIDE, AND RECOVERING THE ARAGONITE CRYSTALS OF CALCIUM CARBONATE FORMED AS SINGLE NEEDLELIKE PARTICLES AND NEEDLE CLUSTERS.
Specification
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Current AssigneeSamuel F. Crawford Jr
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Original AssigneeSamuel F. Crawford Jr
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InventorsCrawford, Samuel F. Jr.
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Application NumberUS03/822,491Time in Patent Office1,686 DaysField of SearchUS Class Current423/432CPC Class CodesB01D 39/06 Inorganic material, e.g. as...
