会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 8. 发明公开
    • 고순도 세릭암모늄나이트레이트의 제조방법
    • 高纯度柠檬酸铵的制备
    • KR1020020027068A
    • 2002-04-13
    • KR1020000058399
    • 2000-10-05
    • (주)이그잭스
    • 김강석
    • C01C1/18
    • C01F17/0012C01C1/185C01F17/0075C01P2006/80
    • PURPOSE: Provided is a preparation method of high purity(>=99%) ceric ammonium nitrate by controlling cerium concentration and acidity of nitric acid in the processing of intermediate preparation and crystallization of cerium compound. CONSTITUTION: The preparation method comprises the steps of: dissolving a salt(carbonate, nitrate, chloride, etc.) or an oxide of Ce3+ and Ce4+, such as Ce(NO3)3, Ce(OH)2 or CeO2, into an aqueous HNO3 solution to be a Ce ion/HNO3 molar ratio of 3-12.5; changing Ce3+ into Ce4+ by adding an oxidant; controlling the concentration of Ce and HNO3 to be 8-81g/L and 0.05-0.8N, respectively by adding deionized water and/or volatilizing HNO3 in cerium/nitric acid solution, which results in precipitating cerium compound, Ce(OH)x(NO3)y·nH2O(x+y=4); filtering; dissolving precipitates into nitric acid solution to be a CeO2/HNO3 molar ratio of 1.26-5.075; adding excess ammonium nitrate and optionally nitric acid solution and deionized water to be Ce4+ of 20g-200g/L and HNO3 of 0.5-9N under the pressure of 1-650mmHg at 65-115deg.C; concentrating at a stirring rate of 350cm/sec for deposition of ceric ammonium nitrate; filtering, washing with water, HNO3 or organic solvent and drying under 85deg.C.
    • 目的:在中间体制备和铈化合物结晶处理中,通过控制硝酸的铈浓度和酸度,提供了高纯度(> = 99%)的硝酸铈铵的制备方法。 构成:制备方法包括:将Ce(NO 3)3,Ce(OH)2或CeO 2等Ce 3+和Ce 4+的盐(碳酸盐,硝酸盐,氯化物等)或氧化物溶解在水 HNO3溶液为Ce离子/ HNO3摩尔比为3-12.5; 通过加入氧化剂将Ce3 +转化为Ce4 +; 通过在铈/硝酸溶液中加入去离子水和/或挥发HNO 3,分别控制Ce和HNO3的浓度为8-81g / L和0.05-0.8N,导致铈化合物Ce(OH)x( NO3)Y·NH2O(X + Y = 4); 滤波; 将沉淀物溶解在硝酸溶液中,使CeO2 / HNO3的摩尔比为1.26-5.075; 在1-650mmHg的压力下,在65-115℃下加入过量的硝酸铵和任选的硝酸溶液和去离子水,使Ce4 +为20g-200g / L,HNO3为0.5-9N; 以350cm / sec的搅拌速度浓缩,沉积硝酸铈铵; 过滤,用水,HNO3或有机溶剂洗涤,在85℃下干燥。