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Oxygen production flux core for oxygen candles and preparation method thereof

A drug core and oxygen candle technology, which is applied in the field of chemical oxygen generation, can solve the problems of high cost of lithium-related raw materials, and achieve the effects of improved safety, low cost, and improved reliability

Pending Publication Date: 2022-01-11
718TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

European patent EP 0630351B1 added lithium phosphate, lithium metaborate and lithium tetraborate to the composition of the oxygen-generating drug core of the oxygen candle to adjust the oxygen supply rate and smooth the oxygen supply curve, and improve the structural integrity of the oxygen candle. However, lithium-related higher cost of raw materials

Method used

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  • Oxygen production flux core for oxygen candles and preparation method thereof
  • Oxygen production flux core for oxygen candles and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A preparation method of an oxygen candle oxygen-generating drug core, the steps of the method are as follows:

[0026] (1) The oxygen source sodium chlorate (NaClO 3 ) for abrasive and vibrating sieve pretreatment to obtain a particle size distribution of 40 mesh NaClO with a particle size distribution of more than 95%. 3 Powder, which is the source of oxygen production after pretreatment;

[0027] (2) Weigh the oxygen-producing source and other raw material components after the pretreatment in step (1), taking the overall mass of 360 g of the oxygen-producing drug core raw material as 100%, wherein the components and their mass fractions are as follows: Oxygen source NaClO 3 98%, Catalyst Co 3 o 4 1.7%, chlorine inhibitor MgO 0.1%, binder kaolin 0.2%; place in a mixer for dry mixing, then add 7.2g of water for wet mixing until uniformly mixed. Pour the mixed raw materials into the mold cavity of the shaping tooling, and press it to a density of 1.9g / cm 3 The ox...

Embodiment 2

[0033] A preparation method of an oxygen candle oxygen-generating drug core, the steps of the method are as follows:

[0034] (1) the oxygen source NaClO 3 Grinding and vibrating sieve pretreatment to obtain 40-mesh NaClO with a particle size distribution of more than 95% 3 Powder, which is the source of oxygen production after pretreatment;

[0035] (2) Weigh the oxygen-producing source and other raw material components after the pretreatment in step (1), taking the overall mass of 300 g of the oxygen-producing drug core raw material as 100%, wherein the components and their mass fractions are as follows: Oxygen source NaClO 3 78%, Catalyst Co 3 o 4 10%, chlorine inhibitor MgO 10%, binder kaolin 2%; place in a mixer for dry mixing, then add 10g of water for wet mixing until uniformly mixed. Pour the mixed raw materials into the mold cavity of the shaping tooling, and press it to a density of 1.9g / cm 3 The oxygen-generating drug core of the oxygen candle was dried in a...

Embodiment 3

[0041] A preparation method of an oxygen candle oxygen-generating drug core, the steps of the method are as follows:

[0042] (1) the oxygen source NaClO 3 Grinding and vibrating sieve pretreatment to obtain 40-mesh NaClO with a particle size distribution of more than 95% 3 Powder, which is the source of oxygen production after pretreatment;

[0043] (2) Weigh the oxygen-producing source and other raw material components after the pretreatment in step (1), taking the overall mass of 400 g of the oxygen-producing drug core raw material as 100%, wherein the components and their mass fractions are as follows: Oxygen source NaClO 3 92.5%, Catalyst Co 3 o 4 1%, chlorine inhibitor MgO 1.5%, binder kaolin 5%; place in a mixer for dry mixing, then add 15g of water for wet mixing until uniformly mixed. Pour the mixed raw materials into the mold cavity of the shaping tool, and press it to a density of 2.1g / cm 3 The oxygen-generating drug core of the oxygen candle was dried in an...

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Abstract

The invention relates to an oxygen production flux core for oxygen candles and a preparation method thereof, and belongs to the technical field of chemical oxygen generation. The oxygen production flux core comprises the following raw material components in percentage by mass: 78-98% of an oxygen production source, 1-10% of a catalyst, 0.1-11% of a chlorine inhibitor and 0.2-5% of a binder. The oxygen production source is more than one of sodium chlorate and potassium perchlorate; the catalyst is more than one of cobaltosic oxide and cobaltic oxide; the chlorine inhibitor is more than one of magnesium oxide and sodium silicate; and the binder is kaolin. An oxygen production source is subjected to grinding and vibration screening pretreatment and then is subjected to dry mixing with other raw material components, and then water is added for wet mixing; and the mixed raw materials are pressed into an oxygen production flux core with the density of 1.9-2.1 g / cm<3>, and the oxygen production flux core is obtained after drying. The oxygen production flux core is good in dechlorination effect, low in cost and low in environmental sensitivity, the oxygen supply rate and the smooth oxygen production curve can be adjusted, and amplitude vibration in the operation period can be borne. Fire extinguishing is not easily caused, and the safety is improved.

Description

technical field [0001] The invention relates to an oxygen candle oxygen-generating drug core and a preparation method thereof, belonging to the technical field of chemical oxygen generation. Background technique [0002] Oxygen candle is a product of spontaneous and continuous oxygen supply composed of chlorate, or perchlorate and catalyst. During the combustion process of the oxygen candle, the chlorate component is heated and melted, and decomposes to produce oxygen after reaching the decomposition temperature. The unconstrained melting of chlorate can easily lead to the collapse of the oxygen-producing drug core, resulting in a disorganized, irregular and unstable reaction front, which in turn leads to the formation of holes in the reaction product, which can easily lead to extinguishment under the influence of high-intensity vibration. [0003] Appropriately controlling the morphology of the reaction product of the oxygen-generating drug core, thereby eliminating the fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B13/02
CPCC01B13/0218
Inventor 李栋梁闫亚辉刘彤董众豹康虎唐正鹏
Owner 718TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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