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ammonium carbamate     
相关语句
  甲铵
     OPERATING ANALYSIS OF HP AMMONIA PUMP AND AMMONIUM CARBAMATE PUMP AFTER FREQUENCY GOVERNOR SPEED CHANGED
     高压氨泵、甲铵泵改变频器调速运行情况分析
短句来源
     APPLICATION SUMMARY OF HIGH SPEEDCENTRIFUGAL AMMONIUM CARBAMATE PUMPS
     高速离心式甲铵泵应用情况总结
短句来源
     An analysis is made of the corrosion of the ammonium carbamate condenser(E104) in the ammonia stripping urea process, and relevant corrosion preventive measures are proposed.
     本文就氨气提尿素工艺中甲铵冷凝器(E104)的腐蚀问题进行了剖析,提出相应防腐措施。
短句来源
     Causes and Countermeasures for Leakage of End Cover of Tube Box of Ammonium Carbamate Preheater
     甲铵预热器管箱端盖泄漏的原因及对策
短句来源
     To this end, measures are taken to lower the ammonia carbon ratio in the high pressure system, shut down the cut off valve for the gas phase from the medium pressure ammonia condenser to the liquid ammonia storage tank, raise the low pressure decompostion temperature, and improve the operation method for the carbon dioxide compressor, hydrolysis unit and high pressure ammonium carbamate pump, so that the urea unit achieves the aim of safe, stable and economic operation.
     为此 ,通过降低高压系统的氨碳比、关闭中压氨冷凝器至液氨贮槽的气相切断阀、提高低压分解温度、改进二氧化碳压缩机、水解装置和高压甲铵泵的操作方法等措施 ,使尿素装置达到了安全、稳定、经济运行的目的。
短句来源
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  氨基甲酸铵
     The Corrosion Cracking and Protection of the Ammonium Carbamate Pump Cylinder
     氨基甲酸铵泵泵体的腐蚀开裂与防护
短句来源
     Synthesis and Improve on Methods of Ammonium Carbamate
     氨基甲酸铵的合成及方法的改进
短句来源
     A fresh sample of ammonium carbamate was synthesized by CO 2 and NH 3,which were prepared by ourselves with chemical method to be measured the chemical equilibrium constant for the teachers and students. The aim of the experiment is to let students learn the skill of measurment of the low vacuum and equilibrium pressure.
     采用了化学方法 ,自制了CO2 气和NH3 气 ,改装了实验装置 ,选择确定了合适的实验条件 ,合成出了氨基甲酸铵新鲜样品 ,供师生测定化学反应的平衡常数 ,掌握其低真空及平衡压力测定的实验技能
短句来源
  甲铵盐
     ABOUT AMMONIUM CARBAMATE IN AMMONIA CIRCULATING SYSTEM
     浅谈合成氨循环系统中的甲铵盐
短句来源
     Discusses the forming conditions of ammonium carbamate( crystal) in ammonia compression circulating system and its harmfulness to equipment, and proposes preventive measures a-gainst formation of ammonium carbamate.
     探讨合成氨压缩循环系统中甲铵盐结晶生成的条件以及对设备的危害,提出预防甲铵盐产生的措施。
短句来源
  甲铵泵
     OPERATING ANALYSIS OF HP AMMONIA PUMP AND AMMONIUM CARBAMATE PUMP AFTER FREQUENCY GOVERNOR SPEED CHANGED
     高压氨泵、甲铵泵改变频器调速运行情况分析
短句来源
     APPLICATION SUMMARY OF HIGH SPEEDCENTRIFUGAL AMMONIUM CARBAMATE PUMPS
     高速离心式甲铵泵应用情况总结
短句来源
     To this end, measures are taken to lower the ammonia carbon ratio in the high pressure system, shut down the cut off valve for the gas phase from the medium pressure ammonia condenser to the liquid ammonia storage tank, raise the low pressure decompostion temperature, and improve the operation method for the carbon dioxide compressor, hydrolysis unit and high pressure ammonium carbamate pump, so that the urea unit achieves the aim of safe, stable and economic operation.
     为此 ,通过降低高压系统的氨碳比、关闭中压氨冷凝器至液氨贮槽的气相切断阀、提高低压分解温度、改进二氧化碳压缩机、水解装置和高压甲铵泵的操作方法等措施 ,使尿素装置达到了安全、稳定、经济运行的目的。
短句来源
     A comparison is made of the 6 gland packings for the ammonium carbamate pumps used in this company in terms of heat conductivity, thermal expansion coefficient, heat resistance, corrosion resistance, frictional characteristics, self lubrication properties, yield strength, PV, tensile strength and compression strength, and based on the results of comparison and actual service, GFO and TFA can well satisfy the requirements for normal operation of the ammonium carbamate pumps.
     从导热系数、热膨胀系数、耐热性能、耐腐蚀性能、摩擦性能、自润滑性能、屈服性能、PV情况及抗拉、抗压强度等方面对我公司所使用过的6种甲铵泵用密封填料进行比较,根据比较结果及实际使用情况,GFO与TFA能很好地满足甲铵泵正常工作的要求。
短句来源
     This paper presents the operation and maintenance of high speed centrifugal ammonium carbamate pumps,sums up the technical revamp and existing problems of the pump.
     介绍高速离心式甲铵泵的操作和维护检修情况,对该泵有关技术改造和存在的问题进行总结。
短句来源
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  ammonium carbamate
Carbon dioxide can react reversibly with the NH3 gas to form ammonium carbamate, NH4COONH2 (a solid with low solubility in liquid NH3) and, therefore, can be present in cylinder sources both in the free and chemically bound form.
      
Alkaline H2NCO-2/HCO3-/CO32- solutions, derived from the dissolution of ammonium carbamate (NH4H2NCO2; AC), dissolve CPM by base hydrolysis of the PMo12O403- Keggin anion, ultimately forming [MoO4]2- and PO43- when excess base is present.
      
A Spectroscopic Study of the Dissolution of Cesium Phosphomolybdate and Zirconium Molybdate by Ammonium Carbamate
      
Infrared spectra of ammonium carbamate and bicarbonate
      
Lipase-catalyzed enantioselective ammonolysis of phenylglycine methyl ester was processed by in?situ racemization with ammonium carbamate as the acyl acceptor.
      
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On heating with sulfuric acid, the bagasse readily hydrolysed'to glucose and finally manganese sul-fate. The manganese - ammonium -carbamate obtained by reaction between carbonization mother liquor and manganese sulfate. The manganese carbonate obtained when manganese - ammon um - carbamate was decomposition at 79℃ and then crude manganese dioxide obtained by decomposition of manganese carbonate in air at 325℃. The γ-manganese dioxide obtained by treatment with surfuric acid and sodium chlorate....

On heating with sulfuric acid, the bagasse readily hydrolysed'to glucose and finally manganese sul-fate. The manganese - ammonium -carbamate obtained by reaction between carbonization mother liquor and manganese sulfate. The manganese carbonate obtained when manganese - ammon um - carbamate was decomposition at 79℃ and then crude manganese dioxide obtained by decomposition of manganese carbonate in air at 325℃. The γ-manganese dioxide obtained by treatment with surfuric acid and sodium chlorate. It was noteworthy that the product cost was much less than that of old process since the wet processing of natural manganese dioxide used the cheap bagasse and carbonization mot ter liquor.

蔗渣在热硫酸中迅速水解为葡萄糖,随即生成硫酸锰,碳化母液与硫酸锰反应制得氮基甲酸铵锰,生成物在79℃分解为碳酸锰,分解产物在325℃氧化分解为粗制二氧化锰,最后,通过硫酸和氯酸钠处理制得γ—二氧化锰。值得注意的是:本产品的成本大大低于老工艺,因为天然二氧化锰的(?)法处理采用了廉价易得的蔗渣及碳化母液。

This paper analyzes the reasons for the low content of ammonia in medium pressure ammonium carbamate in ammonia-stripping urea process and influence on the system.Puts forward some suggestions in actual operation.

分析了氨汽提法尿素工艺的中压甲铵液氨含量偏低的原因及对系统的影响,提出了在实际操作中的几点建议。

This article is a supplement to the newly compiled "Urea Technology" and describes a method for calculation of the ammonium carbamate decomposition rate in the step of thermal decomposition under reduced pressure in the urea process, the overall ammonia evaporation rate and the vapor liquid composition after decomposition. The nomograms provided can be used to calculate the above parameters under the conditions of various decomposition pressures and heating temperatures in the traditional aqueous solution...

This article is a supplement to the newly compiled "Urea Technology" and describes a method for calculation of the ammonium carbamate decomposition rate in the step of thermal decomposition under reduced pressure in the urea process, the overall ammonia evaporation rate and the vapor liquid composition after decomposition. The nomograms provided can be used to calculate the above parameters under the conditions of various decomposition pressures and heating temperatures in the traditional aqueous solution total recycle process.

本文是新编《尿素工学》一书的一些补充。叙述了用等压似三元相图计算尿素工艺中减压加热分解工序中的甲铵分解率、总氨蒸出率以及分解后的气液组成的方法。提供的算图可作为传统的水溶液全循环法各种分解压力和加热温度条件下上述各参数计算之用

 
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