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Amido complex compound and preparation method and usage

A complex and amino technology, applied in the fields of storage and transportation, separation of ammonia gas, and purification, can solve the problems of easy leakage of ammonia gas, harm to health, pressure rise, etc., to improve conversion efficiency, fast separation speed, and increase ammonia net worth effect

Inactive Publication Date: 2008-05-21
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the liquid ammonia container will expand when heated, and the pressure will increase, which will easily cause the explosion of the steel cylinder or storage tank, and the safety is poor.
In addition, ammonia gas is easy to leak. Once ammonia gas leaks out, it will cause serious environmental pollution and endanger people's health.

Method used

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  • Amido complex compound and preparation method and usage
  • Amido complex compound and preparation method and usage
  • Amido complex compound and preparation method and usage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Formulated 15% by weight of LiF, LiCl, LiBr, MgF 2 , MgCl 2 , CaCl 2 , Ca(NO 3 ) 2 , CaSO 4 , AlCl 3 , Al(NO 3 ) 3 , FeCl 3 , CoCl 2 , Co(NO 3 ) 2 , MnCl 2 , NiCl 2 , CuCl 2 , CuSO 4 , ZnCl 2 , ZnSO 4 , BaCl 2 , BaSO 4 , SnCl 2 , MgCl 2 -CaCl 2 , MgF 2 -CaCl 2 , CaCl 2 -Ca(NO 3 ) 2 , CaCl 2 -AlCl 3 , NiCl 2 -CuCl 2 , Co(NO 3 ) 2 -Zn(NO 3 ) 2 , MgCl 2 -CaCl 2 -AlCl 3 , MgCl 2 -CaCl 2 -CuCl 2 , CaCl 2 -BaCl 3 -ZnCl 2 , Cu(NO 3 ) 2 -Co(NO 3 ) 2 -Zn(NO 3 ) 2 , MgCl 2 -CaCl 2 -CaSO 4 -ZnSO 4 , MgCl 2 -CaCl 2 -CuCl 2 -ZnCl 2 Methanol solution, under the condition of reaction temperature of 30°C and constant stirring, pass ammonia gas into the solution to form a saturated amino complex solution; filter the saturated amino complex solution to obtain amino complex precipitate , and wash the precipitate with methanol solution saturated with ammonia; the washed amino complex precipitates under the protection of an inert gas,...

Embodiment 2

[0031] Pass 0.5MPa ammonia gas into the MgCl-filled 2 , CaCl 2 、CoCl 2 , CuCl 2 、NiCl 2 and MgCl 2 -CaCl 2 , CaCl 2 -Ca(NO 3 ) 2 , CuSO 4 -ZnSO 4 , MgCl 2 -CaCl 2 -CaSO 4 -ZnSO 4 stainless steel reactor, allowing it to react at room temperature to generate ammonia-saturated MgCl 2 -6NH 3 , CaCl 2 -8NH 3 、CoCl 2 -6NH 3 , CuCl 2 -8NH 3 、NiCl 2 -6NH 3 and (MgCl 2 -CaCl 2 )-14NH 3 , (CaCl 2 -Ca(NO 3 ) 2 )-16NH 3 , (CuSO 4 -ZnSO 4 )-16NH 3 and (MgCl 2 -CaCl 2 -CaSO 4 -ZnSO 4 )-36NH 3 , then take by weighing 5g of the gained sample and put it into a ball milling tank, the ball-to-material ratio is 40:1, and the ball milling time is 12h. In the ball milling tank, argon is filled as a protective gas, and mechanical ball milling is carried out to test the ammonia release performance of the sample after ball milling. The results are listed in Table 2. It can be seen from Table 2 that after ball milling, the sample can be rapidly deaminated in the r...

Embodiment 3

[0035] Anhydrous MgCl 2 React with 0.5MPa ammonia to generate ammonia-saturated amino complex MgCl 2 (NH 3 ) 6 , and a temperature-rising desorption experiment was performed on it. Figure 1 is Mg(NH 3 ) 6 Cl 2 The relationship between deamination rate and temperature at a heating rate of 10°C / min. It can be seen from the figure that saturated Mg(NH 3 ) 6 Cl 2 Ammonia is released rapidly at 160°C, and the release of ammonia is completed when the temperature reaches 330°C, the pressure of the released ammonia gas can reach ~0.6MPa, and the process of releasing ammonia is also completed within ~20min, showing that the material has excellent kinetics of releasing ammonia performance. The reaction equation of this process is Mg(NH 3 ) 6 Cl 2 (s)→MgCl 2 (s)+6NH 3 (g). When the temperature is lower than 100°C, the ammonia pressure in the system is lower than 0.001MPa. For the 5MPa low-pressure ammonia synthesis system, this shows that after the adsorption operation, t...

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Abstract

The invention discloses an amino complex compound and a preparation method and application thereof. The components of the amino complex compound are MX (NH3)n, wherein, M is one or a plurality of Li, Mg, Al, Ca, Sc, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Sr, Ba, Sn; X is one or a plurality of F, Cl, Br, NO3, SO4; m is determined according to chemical valence, which is less than or equal to 5 and more than or equal to 1; n is determined according to coordination number, which is less than or equal to 15 and more than or equal to 1. The amino complex compound is used as an absorbent of amino after deamination and realizes separation, purification, storage and transporting of ammonia gas through low-temperature ammonia absorption and high-temperature ammonia discharge. The ammonia in circulating gas used in a synthetic ammonia technique of the invention has fast separation speed and the ammonia content entering into a tower can be reduced below 0.1 percent, thus remarkably promoting the ammonia net value and improving the transformation efficiency of the synthetic ammonia technique; furthermore, the invention can be suitable for different ammonia synthesis systems, in particular to a low-pressure ammonia synthesis system and realize the solidification of the ammonia gas during storage and transporting processes; the ammonia storage quantity can reach 40 to 70wt percent with safety and high efficiency.

Description

technical field [0001] The invention relates to ammonia separation, purification, storage and transportation, especially the ammonia separation, purification, storage and transportation technology in the ammonia synthesis process. Background technique [0002] As an important chemical raw material, ammonia is widely used. The application of ammonia involves the separation, purification, storage and transportation of ammonia, especially in the synthetic ammonia industry. [0003] With the advancement of synthetic ammonia industrial technology, ammonia synthesis towers around the world are developing in the direction of low energy consumption and high efficiency. At present, there are two ways to save energy in the synthesis section: one is to save water, electricity and refrigeration consumption; the other is to improve the recovery grade and utilization rate of ammonia synthesis reaction heat. The key to realizing these two pathways is to increase the net value of ammonia....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01C1/00
Inventor 潘洪革刘永锋林仁波王建辉高明霞
Owner ZHEJIANG UNIV
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