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Hydroxylamine nitrate crystal preparation method

A technology of hydroxylamine nitrate and crystals, which is applied in the field of preparation of hydroxylamine nitrate crystals, can solve problems such as cumbersome steps, and achieve the effect of meeting the requirements of HAN concentration and purity

Inactive Publication Date: 2015-09-23
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the concentration of the HAN concentrate prepared in each batch is different, it is necessary to test the concentration of the HAN concentrate in each batch, and the steps are cumbersome

Method used

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  • Hydroxylamine nitrate crystal preparation method

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Embodiment 1-14

[0024] Steps of the present invention:

[0025] (1) Weigh the raw materials barium nitrate and hydroxylamine sulfate according to the ratio of 1:1, and pour them into suitable three-necked bottles and beakers respectively;

[0026] (2) According to the ratio of adding 1500ml-2500ml distilled water per mole of barium nitrate, add an appropriate amount of distilled water into the three-necked bottle, raise the temperature to 60°C-70°C, and keep stirring until the barium nitrate is completely dissolved;

[0027] (3) According to the proportion of adding 500ml-1000ml distilled water per mole of HAS, add an appropriate amount of distilled water into the beaker, and keep stirring at room temperature until HAS is completely dissolved;

[0028] (4) Add the HAS aqueous solution to the barium nitrate aqueous solution at a rate of 1 drop / second to 3 drops / second, and the reaction system is always maintained at 60°C to 70°C. After the HAS aqueous solution is added dropwise, continue to m...

Embodiment 2

[0035] Prepare multiple batches of HAN crystals, and analyze them by infrared, liquid phase, and purity.

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Abstract

A hydroxylamine nitrate crystal preparation method mainly comprises the following several steps: weighing and dissolving raw materials, mixing raw materials and reacting, filtering and concentrating a product, adding a proper organic solvent and freezing, drying the product, sealing and preserving the product. According to solubility difference of HAN and water in two organic solvents, HAN and water can be well separated, and HAN dissolved in an organic solvent can be recovered such that loss of HAN is low. Purity of HAN crystal prepared by the method is high. The HAN crystal prepared by the method can be made into HAN aqueous solutions of different concentrations at any time, and the complicated process of concentration testing of each batch of HAN concentrated solution is omitted. Requirements of a single-base propellant on HAN concentration and purity are met.

Description

technical field [0001] The invention relates to a preparation method of hydroxylamine nitrate crystals. Background technique [0002] Hydroxylamine Nitrate, Hydroxylamine Nitrate (HAN for short), is a white crystal, highly hygroscopic, soluble in water and ethanol. The molecular weight is 96.02, the melting point is 48°C, and it can decompose rapidly when the temperature is above 110°C. HAN is a kind of reducing component (NH 3 Oh + ) and oxidizing components (NO 3 - ) compound, so it is not only a highly efficient reducing agent, but also a high-energy oxidizing agent. As a reducing agent, HAN is mainly used in the extraction of various radioactive elements, the treatment of nuclear raw materials and the regeneration of nuclear waste. As a high-energy oxidant, HAN can be formulated with triethanolamine nitrate (TEAN) and water in a certain ratio to form a HAN-based liquid propellant, and HAN can also be added to polyvinyl alcohol (PVA) hydrogel to prepare a gas genera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/48C01B21/14
Inventor 王金强李洪旭庞爱民武卓罗斌石东景
Owner HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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