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2. 发明公开

EP0123749A1 Continuous process for the manufacture of calcium hypochlorite 有权转让
标题翻译： Kontinueierliches Verfahren zur Herstellung von Calciumhypochlorit。
公开(公告)号：EP0123749A1
公开(公告)日：1984-11-07
申请号：EP83307040.2
申请日：1983-11-17
申请人： OLIN CORPORATION
发明人： Sakowski, Walter John , Bajaj, Manoharlal Chunilal , Duncan, Budd Lee
IPC分类号： C01B11/06
CPC分类号： C01B11/064
摘要： A continuous process for the production of calcium hypochlorite comprises admixing a slurry of lime containing insoluble impurities with a saturated calcium hypochlorite solution in a crystallizing zone. An impure slurry of coarse dibasic calcium hypochlorite crystals, small crystals of dibasic calcium hypochlorite, and fine insolubles comprised of unreacted lime particles and fine insolubles in a mother liquor is formed. The slurry is fed to the intermediate section of a separation zone. An aqueous sodium chloride elutriant is fed to the lower section of the separation zone to contact the slurry and to separate a slurry of fine insolubles and small crystals of dibasic calcium hypochlorite in elutriant from the dibasic calcium hypochlorite crystals. Small crystals of dibasic calcium hypochlorite are separated from the fine insolubles in the intermediate section of the separation zone. These small crystals can be recycled to the crystallizing zone or destroyed by chlorination. The slurry of fine insolubles is conveyed in the elutriant to the upper section of the separation zone. A slurry of purified coarse dibasic calcium hypochlorite crystals in elutriant is removed from the lower section of the separation zone, the rate of removal of the purified coarse crystals of dibasic calcium hypochlorite being controlled to maintain a rising velocity in the lower section of the separation zone of from about 0.5 to about 7 centimeters per minute. Purified coarse dibasic calcium hypochlorite crystals are separated from a dibasic calcium hypochlorite mother liquor, and admixed with an alkali metal hypochlorite solution to produce a mixed alkali slurry. The mixed alkali slurry is chlorinated to form a slurry of calcium hypochlorite dihydrate crystals in a saturated (Continuation next page)
calcium hypochlorite solution. The slurry of calcium hypb- chorite dihydrate crystals is separated to provide a cake of calcium hypochlorite dihydrate crystals and a saturated calcium hypochlorite solution. The cake of calcium hypochlorite dihydrate crystals is dried to produce granular calcium hypochlorite. The saturated calcium hypochlorite solution is recycled to the crystallizing zone.
摘要翻译：用于生产次氯酸钙的连续方法包括将含有不溶性杂质的石灰浆料与饱和的次氯酸钙溶液混合在结晶区中。形成粗碱性次氯酸钙晶体的不纯浆液，二价次氯酸钙的小晶体，以及在母液中由未反应的石灰颗粒和精细不溶物组成的精细不溶物。将浆料送入分离区的中间部分。将氯化钠洗脱液加入到分离区的下部，以与浆料接触，并将来自二价次氯酸钙晶体的洗脱液中的细小不溶物和次要次氯酸钙的小晶体的浆液分离出来。二元次氯酸钙的小晶体与分离区的中间部分的细微不溶物分离。这些小晶体可以再循环到结晶区或被氯化破坏。精细不溶物的浆液在洗脱液中输送到分离区的上部。从分离区的下部去除在洗脱液中纯化的粗二元次氯酸钙晶体的浆液，控制二次次氯酸钙的纯化粗晶体的去除速率以保持分离区的下部的上升速度为约0.5至约7厘米每分钟。将纯化的粗二价次氯酸钙晶体与二价次氯酸钙母液分离，并与碱金属次氯酸盐溶液混合以产生混合碱浆。将混合的碱性浆料氯化以在饱和的次氯酸钙溶液中形成次氯酸钙水合物的浆料。分离钙闪烁二水合物晶体的浆料，以提供次氯酸钙晶体和饱和的次氯酸钙溶液的滤饼。将次氯酸钙晶体的滤饼干燥以产生颗粒状次氯酸钙。将饱和的次氯酸钙溶液再循环至结晶区。

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