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    • 1. 发明授权
    • Method for analyzing aqueous ammonium carbamate solution, and method for operating unreacted gas absorber
    • 用于分析氨基甲酸铵水溶液的方法和操作未反应的气体吸收剂的方法
    • US08663995B2
    • 2014-03-04
    • US13321529
    • 2010-05-12
    • Eiji SakataKenji YoshimotoShuhei Nakamura
    • Eiji SakataKenji YoshimotoShuhei Nakamura
    • F17D3/00G01N33/18G01N33/00
    • C07C273/04Y10T137/0318Y10T436/173845Y10T436/175383
    • There are provided a method for analyzing an aqueous ammonium carbamate solution whereby the composition of an unreacted-gas absorber outlet liquid can be specified in real time, and a method for operating an unreacted gas absorber by use of the same. The method for analyzing the composition of an aqueous ammonium carbamate solution includes determining ammonia component concentration, carbon dioxide component concentration, and water concentration of the aqueous ammonium carbamate solution, which is the unreacted-gas absorber outlet liquid in a urea production process, by using a correlation among viscosity, temperature, and carbon dioxide component concentration of the aqueous solution and a correlation among density, temperature, ammonia component concentration, and carbon dioxide component concentration of the aqueous solution, wherein the ammonia component concentration is a concentration of a sum of free ammonia and equivalent ammonia of ammonium carbamate which are contained in the aqueous solution, and the carbon dioxide component concentration is a concentration of equivalent carbon dioxide of ammonium carbamate contained in the aqueous solution.
    • 提供了一种用于分析氨基甲酸铵水溶液的方法,其中可以实时指定未反应气体吸收剂出口液体的组成,以及使用该方法操作未反应的气体吸收剂。 用于分析氨基甲酸铵水溶液的组成的方法包括在尿素生产过程中测定作为未反应气体吸收剂出口液体的氨基甲酸铵水溶液的氨组分浓度,二氧化碳组分浓度和水浓度,通过使用 水溶液的粘度,温度和二氧化碳组分浓度之间的相关性以及水溶液的密度,温度,氨组分浓度和二氧化碳组分浓度之间的相关性,其中氨组分浓度是 游离氨和氨水溶液中的氨基甲酸铵等量的氨,二氧化碳成分浓度是水溶液中含有的氨基甲酸铵的二氧化碳当量浓度。
    • 7. 发明申请
    • METHOD FOR ANALYZING AQUEOUS AMMONIUM CARBAMATE SOLUTION, AND METHOD FOR OPERATING UNREACTED GAS ABSORBER
    • 用于分析水溶性氨基甲酸铵溶液的方法和操作无气体吸收剂的方法
    • US20120060931A1
    • 2012-03-15
    • US13321529
    • 2010-05-12
    • Eiji SakataKenji YoshimotoShuhei Nakamura
    • Eiji SakataKenji YoshimotoShuhei Nakamura
    • F17D3/00G01N33/18
    • C07C273/04Y10T137/0318Y10T436/173845Y10T436/175383
    • There are provided a method for analyzing an aqueous ammonium carbamate solution whereby the composition of an unreacted-gas absorber outlet liquid can be specified in real time, and a method for operating an unreacted gas absorber by use of the same. The method for analyzing the composition of an aqueous ammonium carbamate solution includes determining ammonia component concentration, carbon dioxide component concentration, and water concentration of the aqueous ammonium carbamate solution, which is the unreacted-gas absorber outlet liquid in a urea production process, by using a correlation among viscosity, temperature, and carbon dioxide component concentration of the aqueous solution and a correlation among density, temperature, ammonia component concentration, and carbon dioxide component concentration of the aqueous solution, wherein the ammonia component concentration is a concentration of a sum of free ammonia and equivalent ammonia of ammonium carbamate which are contained in the aqueous solution, and the carbon dioxide component concentration is a concentration of equivalent carbon dioxide of ammonium carbamate contained in the aqueous solution.
    • 提供了一种用于分析氨基甲酸铵水溶液的方法,其中可以实时指定未反应气体吸收剂出口液体的组成,以及使用该方法操作未反应的气体吸收剂。 用于分析氨基甲酸铵水溶液的组成的方法包括在尿素生产过程中测定作为未反应气体吸收剂出口液体的氨基甲酸铵水溶液的氨组分浓度,二氧化碳组分浓度和水浓度,通过使用 水溶液的粘度,温度和二氧化碳组分浓度之间的相关性以及水溶液的密度,温度,氨组分浓度和二氧化碳组分浓度之间的相关性,其中氨组分浓度是 游离氨和氨水溶液中的氨基甲酸铵等量的氨,二氧化碳成分浓度是水溶液中含有的氨基甲酸铵的二氧化碳当量浓度。
    • 9. 发明授权
    • Process for generation of fertilizer granules containing urea and ammonium sulfate
    • 生成含尿素和硫酸铵的肥料颗粒的方法
    • US06179893B2
    • 2001-01-30
    • US09330473
    • 1999-06-11
    • Horst BendixHeinz LangeKlaus Sch{umlaut over (u)}belHans-Joachim WachsmuthTetsuzo HondaEiji SakataGenshi Nishikawa
    • Horst BendixHeinz LangeKlaus Sch{umlaut over (u)}belHans-Joachim WachsmuthTetsuzo HondaEiji SakataGenshi Nishikawa
    • C05C900
    • C05C3/00C05C9/00
    • There is disclosed a process to produce fertilizer granules containing urea and ammonium sulfate with a high ammonium sulfate concentration of ≦60 wt. % in a fluidized bed granulator, which process comprises the steps of: a) a molten urea suspension consisting of ammonium sulfate having an average particle size of 30 to 300 &mgr;m and urea having a temperature range of 120 to 155° C. is produced, b) the molten urea suspension produced at the stage a) is then injected from below on the fine particles of urea/ammonium sulfate in a fluidized bed granulator by means of at least a nozzle, while the fluidized bed is loosened by a spouting air flow in the injection area, and subsequently, c) the fertilizer granules generated in the fluidized bed are separated and, if necessary, treated. Homogeneous urea/ammonium sulfate granules of an ammonium sulfate content between 30 and 60 wt. % can be produced this way without any problems, while the particle size of granules can be adjusted selectively and dust emissions by granulation can be reduced to a minimum.
    • 公开了一种生产含硫酸铵浓度<60重量%的尿素和硫酸铵的肥料颗粒的方法。 %的流化床造粒机,该方法包括以下步骤:a)制备由平均粒径为30-300μm的硫酸铵和温度范围为120-155℃的尿素组成的熔融尿素悬浮液, b)然后在流化床制粒机中通过至少一个喷嘴从下面将α阶段产生的熔融尿素悬浮液从下方注入到尿素/硫酸铵的细颗粒上,同时流化床被喷射空气流松动 在注射区域中,随后c)在流化床中产生的肥料颗粒被分离,并且如果需要,进行处理。 硫酸铵含量在30-60wt。之间的均匀的尿素/硫酸铵颗粒。 可以以这种方式产生%,而没有任何问题,而颗粒的粒度可以选择性地调节,并且通过造粒的粉尘排放可以降低到最小。