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
    • 32. 发明授权
    • Process for obtaining potassium nitrate from potassium chloride and
nitric acid
    • 从氯化钾和硝酸中获得硝酸钾的方法
    • US4668495A
    • 1987-05-26
    • US771294
    • 1985-08-30
    • Luis S. Portela
    • Luis S. Portela
    • C01D9/04C01D9/16C01B21/48C01F11/38
    • C01D9/16C01D9/04
    • The present invention provides a process for manufacture of potassium nitrate from potassium chloride and nitric acid. A source of potassium chloride may be screened and separated into fine and coarse fractions, or the screening may be eliminated and the source may be separated into equal coarse fractions. The coarse fraction, when screening has occurred, or one of the equal fractions, where no screening has occurred, is dissolved in a dilute solution of nitric acid prior to any reaction. Thereafter, either the fine fraction (if screening occurred) or the other equal fraction (if no screening occurred) reacts with the dilute nitric acid-potassium chloride solution and additional nitric acid having a concentration of about 60% at ambient temperature. The resulting solution may be crystallized with or without the prior separation of solid potassium nitrate. Nitric acid is recovered by solvents from a residual brine solution after crystallization. The recovered nitric acid is washed to provide a nitric acid solution having a concentration of 3% to 10% which is recycled for use at the beginning of the process to dissolve the coarse fraction of potassium chloride prior to the reaction stage.
    • 本发明提供从氯化钾和硝酸制造硝酸钾的方法。 氯化钾的来源可以筛选并分离成精细和粗级分,或者筛选可以被去除,并且源可以分离成相等的粗级分。 当发生筛选时,粗级分或其中没有发生筛选的相等级分之一在任何反应之前溶解在稀硝酸溶液中。 此后,细小部分(如果发生筛选)或其他相等的分数(如果没有筛选发生)在环境温度下与稀硝酸 - 氯化钾溶液和浓度约为60%的另外的硝酸反应。 所得到的溶液可以在或不先前分离固体硝酸钾的情况下结晶。 结晶后,硝酸由残留的盐水溶液通过溶剂回收。 回收的硝酸被洗涤以提供浓度为3%至10%的硝酸溶液,其在该方法开始时被循环使用,以在反应阶段之前溶解氯化钾的粗级分。
    • 40. 发明授权
    • Purification of alkali metal nitrates
    • 碱金属硝酸盐的纯化
    • US4517164A
    • 1985-05-14
    • US613666
    • 1984-05-24
    • Louis C. FiorucciKevin M. Gregory
    • Louis C. FiorucciKevin M. Gregory
    • C01D9/16C01F11/36
    • C01D9/16Y02P20/134
    • A process is disclosed for removing heavy metal contaminants from impure alkali metal nitrates containing them. The process comprises mixing the impure nitrates with sufficient water to form a concentrated aqueous solution of the impure nitrates, adjusting the pH of the resulting solution to within the range of between about 2 and about 7, adding sufficient reducing agent to react with heavy metal contaminants within said solution, adjusting the pH of the solution containing reducing agent to effect precipitation of heavy metal impurities and separating the solid impurities from the resulting purified aqueous solution of alkali metal nitrates. The resulting purified solution of alkali metal nitrates may be heated to evaporate water therefrom to produce purified molten alkali metal nitrate suitable for use as a heat transfer medium. If desired, the purified molten form may be granulated and cooled to form discrete solid particles of alkali metal nitrates.
    • 公开了从含有它们的不纯碱金属硝酸盐中除去重金属污染物的方法。 该方法包括将不纯的硝酸盐与足够的水混合以形成不纯的硝酸盐的浓缩水溶液,将所得溶液的pH调节至约2至约7的范围内,加入足够的还原剂与重金属污染物 在所述溶液中,调节含有还原剂的溶液的pH以使重金属杂质沉淀,并从所得纯化的碱金属硝酸盐水溶液中分离出固体杂质。 得到的碱金属硝酸盐的精制溶液可以被加热以从其中蒸发水,以产生适合用作传热介质的纯化的熔融碱金属硝酸盐。 如果需要,可以将纯化的熔融形式造粒并冷却以形成离散的碱金属硝酸盐的固体颗粒。