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Preparation process of depleted anhydrous zinc acetate

An anhydrous zinc acetate and preparation technology, applied in the chemical field of nuclear power plants, can solve the problems of increased sample post-processing time, long product preparation cycle, and many reaction steps, and achieve the effects of easy industrial scale-up, short reaction time, and simple operation

Inactive Publication Date: 2021-10-29
RES INST OF PHYSICAL & CHEM ENG OF NUCLEAR IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process has many reaction steps and the overall yield is low, and the intermediate product zinc oxide needs to be roasted at high temperature in a muffle furnace, which increases the sample post-processing time and the product preparation cycle is long

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A preparation process of depleted anhydrous zinc acetate, comprising the following steps:

[0036] (i) Preparation of depleted diethylzinc n-hexane solution

[0037] Pass n-hexane into the mixing device with stirring, then pass the depleted diethyl zinc into the n-hexane in the mixing device, stir and mix evenly, after preparing depleted diethyl zinc n-hexane solution, continue to Inert gas is introduced into the mixing device until the internal pressure of the device is 0.4MPa.

[0038] (ii) Metathesis reaction

[0039] Add 1 kg of glacial acetic acid to the glass reactor, start stirring, connect the feeding pipe in the mixing device to the glass reactor, and add 50% depleted diethyl zinc into the glass reactor through the feeding pipeline under stirring. 1kg of n-hexane solution. During the feeding process, the temperature in the glass reactor was controlled by a temperature control device at 10°C-20°C, the feeding rate of the depleted diethylzinc-n-hexane solution...

Embodiment 2

[0043] A preparation process of depleted anhydrous zinc acetate, comprising the following steps:

[0044] (i) Preparation of depleted diethylzinc n-hexane solution

[0045] Pass n-hexane into the mixing device with stirring, then pass the depleted diethyl zinc into the n-hexane in the mixing device, stir and mix evenly, after preparing the depleted diethyl zinc n-hexane solution, continue to Inert gas is introduced into the mixing device until the internal pressure of the device is 0.6 MPa.

[0046] (ii) Metathesis reaction

[0047]Add glacial acetic acid 5kg in autoclave, start stirring. Connect the feeding pipe in the mixing device to the autoclave, and add 8 kg of depleted diethylzinc-n-hexane solution with a concentration of 30% to the autoclave through the feeding line under stirring. During the feeding process, the temperature of the autoclave was controlled by the temperature control device to be 20°C~30°C, the feeding rate of the depleted diethylzinc-n-hexane soluti...

Embodiment 3

[0051] A preparation process of depleted anhydrous zinc acetate, comprising the following steps:

[0052] (i) Preparation of depleted diethylzinc n-hexane solution

[0053] Pass n-hexane into the mixing device with stirring, then pass the depleted diethyl zinc into the n-hexane in the mixing device, stir and mix evenly, after preparing depleted diethyl zinc n-hexane solution, continue to Inert gas was introduced into the mixing device until the internal pressure of the device was 1.0 MPa.

[0054] (ii) Metathesis reaction

[0055] Add glacial acetic acid 10kg in autoclave, start stirring. Connect the feed pipe in the mixing device to the autoclave, and add 20 kg of depleted diethylzinc-n-hexane solution with a concentration of 70% to the autoclave through the feed line under agitation. During the feeding process, the temperature of the autoclave was controlled by a temperature control device to be 30°C-40°C, the feed rate of the depleted diethylzinc-n-hexane solution was co...

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Abstract

The invention discloses a preparation process of depleted anhydrous zinc acetate. The preparation process comprises the following steps: i) preparing a depleted diethyl zinc n-hexane solution; (ii) performing double decomposition reaction; and (iii) separating a depleted anhydrous zinc acetate product. The purity of the depleted anhydrous zinc acetate product prepared by the method can reach 99.8% or above, product purification is not needed, operation is simple, industrial amplification is easy, and the depleted anhydrous zinc acetate product can be used for preparing a downstream product depleted zinc acetate dihydrate and used for nuclear power zincification; the method is a one-step reaction, the reaction yield can reach 95% or above, and raw materials can be efficiently utilized; and according to the method disclosed by the invention, the depleted diethyl zinc n-hexane solution with a certain concentration is prepared by diluting depleted diethyl zinc with n-hexane, so that the safety coefficient of the reaction can be improved, and the reaction can be completed without inert gas protection.

Description

technical field [0001] The invention belongs to the technical field of nuclear power plant chemistry, and in particular relates to a preparation process of depleted anhydrous zinc acetate. Background technique [0002] Zinc isotopes in the form of depleted zinc acetate dihydrate have been studied in the cooling cycle of nuclear reactors and the reduction of radioactive doses. A large number of experimental results have proved that the depleted 64 Zn( 64 After the zinc isotope products with Zn abundance less than 1% are injected into the primary circuit coolant of the reactor in the form of zinc acetate, the zinc element can penetrate into the oxide film on the surface of the reactor cooling system (RCS), and the zinc ions prevent 58 Co and 60 Co enters into the oxide film, and the improved oxide film has high protection, which can reduce various forms of corrosion, while the replaced 58 Co and 60 Co and other radionuclides form a more stable oxide film, which reduces th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C51/41C07C53/10
CPCC07C51/412C07C53/10
Inventor 李于教吴元明陈俭月侯涛仝庆姜磊
Owner RES INST OF PHYSICAL & CHEM ENG OF NUCLEAR IND
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