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Preparation method of lead hexacyanoferrate
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A technology of ferrous acid and hexacyanocyanide, which is applied in the direction of ferricyanide and metal cyanide, can solve the problems of long production cycle, affecting yield, affecting product performance, etc., and achieves shortened reaction time, less equipment and facilities, and easy operation easy effect
Inactive Publication Date: 2021-05-28
四川蓝狮科技有限公司
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[0004] The advantage of this method is: it can guarantee the complete reaction; the disadvantage is: ① need expensive large-scale equipment (autoclave, high-speed centrifuge), high energy consumption, long production cycle; Containing nitrates affects product performance; ③After centrifugation, washing involves filtration and separation, which increases the process and affects the yield; and centrifugal separation (the volume of the centrifuge tank is generally small) is generally suitable for small and trace pharmaceutical experiments, and is not suitable for enterprise production. Kilogram-level batch operation
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Embodiment 1
[0026] A preparation method of lead hexacyanoferrite, comprising the following steps:
[0027] Add 20g of potassium ferrocyanide to the beaker, add 160mL of deionized water, stir to dissolve the potassium ferrocyanide to obtain a yellow solution, filter and collect the filtrate for later use;
[0028] Add 30g of lead nitrate into the beaker, add 160mL of deionized water, stir to dissolve the lead nitrate to obtain a colorless solution, filter and collect the filtrate for later use;
[0029] Heat the lead nitrate solution to 40°C, under stirring, slowly pour the potassium ferrocyanide solution into the lead nitrate solution, stir and react for 0.5h to form a white suspension, stop stirring;
[0030] Add deionized water 1 times the total volume of the compounding solution to dilute, and precipitate for 6 hours; pour off the supernatant, add 4 / 5 of the volume of the compounding vessel with deionized water and stir to wash, filter; continue to add water to stir, wash, filter. Af...
Embodiment 2
[0033] A preparation method of lead hexacyanoferrite, comprising the following steps:
[0034] Add 1000g of potassium ferrocyanide to a stainless steel bucket, add 10L of deionized water, stir to dissolve potassium ferrocyanide to obtain a yellow solution, filter and collect the filtrate for later use;
[0035] Add 1500g of lead nitrate to a stainless steel bucket, add 10L of deionized water, stir to dissolve the lead nitrate to obtain a colorless solution, filter and collect the filtrate for later use;
[0036] Heat the lead nitrate solution to 50°C, under stirring, slowly pour the potassium ferrocyanide solution into the lead nitrate solution, stir and react for 1 hour to form a white suspension, stop stirring;
[0037] Add deionized water 1 times the total volume of the compounding solution to dilute, and precipitate for 6 hours; pour off the supernatant, add 4 / 5 of the volume of the compounding vessel with deionized water, stir and wash, filter, and pour off the supernatan...
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Abstract
The invention discloses a preparation method of lead hexacyanoferrate, and belongs to the technical field of initiating explosive materials. The method comprises the following steps: (1) respectively dissolving potassiumferrocyanide and lead nitrate as raw materials in deionized water to obtain a potassiumferrocyanide solution and a lead nitrate solution; (2) reacting the potassiumferrocyanide solution and the lead nitrate solution obtained in the step (1) at 50+ / -10 DEG C under a stirring condition to obtain white turbid liquid; (3) adding deionized water of which the amount is multiple times that of the test solution into the white turbid liquid obtained in the step (2) for washing, and repeating the step for at least three times; and (4) detecting that the washing liquid obtained in the step (3) does not have impurities influencing the product quality, and conducting drying to obtain the product. The preparation method disclosed by the invention is simple and convenient to operate, short in reaction time, low in energy consumption and few in equipment and facilities, the working efficiency is improved, and the production cost of purchasing valuable equipment is greatly reduced.
Description
technical field [0001] The invention relates to the technical field of pyrotechnic agents, in particular to a preparation method of lead hexacyanoferrite. Background technique [0002] Ferricyanide is a class of inorganic electroactive materials with a three-dimensional network structure of organic polymers. It is used in food, medicine, and pyrotechnics because of its excellent properties such as cation and energy storage, electrocatalysis, and molecular magnetism. and other fields. Lead hexacyanoferrite, as an important part of the output agent or ignition agent in the pyrotechnic agent, not only has good catalytic activity on other components of the ignition agent, but also can significantly change the combustion mode of the pyrotechnic agent and increase the burning rate of the pyrotechnic agent and stability. The preparation of lead hexacyanoferrite is crucial to the development of military and civilian pyrotechnics, and a simple preparation method has become a key te...
Claims
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