Sodium cyanide process
A process for the production of sodium cyanide crystals comprises; (a) contacting impure hydrogen cyanide and sodium hydroxide in a reactor with mixing for a maximum contact time of about 5 seconds; (b) feeding the resulting mixture to a continuous evaporative crystallizer to produce a slurry of sod...
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Main Authors | , , |
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Format | Patent |
Language | Chinese English |
Published |
02.05.2012
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Subjects | |
Online Access | Get full text |
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Summary: | A process for the production of sodium cyanide crystals comprises; (a) contacting impure hydrogen cyanide and sodium hydroxide in a reactor with mixing for a maximum contact time of about 5 seconds; (b) feeding the resulting mixture to a continuous evaporative crystallizer to produce a slurry of sodium cyanide crystals; (c) passing the slurry of sodium cyanide crystals from the crystallizer over a hot surface to precipitate onto the surface and remove sodium carbonate, and passing said slurry back to the crystallizer; and (d) separating the sodium cyanide crystals from the slurry. |
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Bibliography: | Application Number: CN201080022501 |