Process for producing granulated alkali metal or alkaline earth metal cyanides

• Main Authors: SCHULZE STEFAN DR, ALT HANS CHRISTIAN, SCHUTTE RUDIGER DR
• Format: Patent
• Language: Czech; English
• Published: 16.04.2003
• Edition: 7
• Subjects: AMMONIA; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOUNDS THEREOF; CYANOGEN; INORGANIC CHEMISTRY; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

Zp sob spo v v tom, e vodn² roztok nebo suspenze, obsahuj c kyanid alkalick ho kovu nebo kovu alkalick zeminy se zpracuje rozpraÜovac granulac ve v °iv vrstv , sest vaj c z krystaliza n ch o ek kyanidu a voda se odpa° pomoc proudu suÜic ho plynu o teplot 150 a 500 .degree.C p°i teplot v °iv vrstvy 110 a 350 .degree.C, p°i em suÜic m plynem je p°eh° t vodn p ra.\ The present invention relates to a method for the production of granulated alkali metal or alkaline earth metal cyanides by fluid bed granulation, whereby the invented method comprises spraying a solution or suspension of the cyanide onto a fluidized bed consisting of cyanide nuclei. Water is evaporated using a stream of superheated steam introduced at a temperature of 150 - 500 degC, the fluidized bed temperature being 110 to 350 degC, whereby superheated steam functions as a drying gas.