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Calcium oxide and preparation method thereof

A technology of calcium oxide and calcium hydroxide, applied in the field of materials science, can solve the problems of high manufacturing cost, complicated preparation process, difficult to popularize, etc., and achieve the effect of good surface activity and adsorption capacity

Inactive Publication Date: 2020-02-04
唐山市丰南区奉岗灰业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For calcium oxide, the particle size of the material reaches the micron level, which can make calcium oxide have strong surface activity and adsorption capacity. When used as an adsorbent and decontamination agent, it can double the adsorption and decontamination capabilities, so it is widely used application, but the current preparation process is relatively complicated, the manufacturing cost is high, and it is difficult to promote, so it is necessary to find a preparation method with a lower cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A kind of calcium oxide is made from the following raw materials according to the amount of substances: 40 mol of ammonium chloride, 10 mol of modified calcium hydroxide and 10 mol of sodium carbonate.

[0022] Wherein, the modified calcium hydroxide is obtained through the following steps: the calcium carbide is washed and then dried, passed through a 250-mesh sieve after being pulverized by a grinder, and then calcined in a vacuum furnace at 350°C for 1 hour, cooled naturally to obtain calcium carbide treatment Slag, calcium carbide treatment slag is slowly added to deionized water, the weight ratio of the calcium carbide treatment slag and deionized water is 1:5 Use a 1000r / min magnetic stirrer to stir the above solution, stir for 4min, let stand for 20min, and mix the solution After filtering, drying at room temperature to obtain modified calcium hydroxide.

[0023] In the present embodiment, described a kind of preparation method of calcium oxide, the steps are as ...

Embodiment 2

[0031] A calcium oxide is prepared from the following raw materials according to the amount of substances: 60 mol of ammonium chloride, 20 mol of modified calcium hydroxide and 20 mol of sodium carbonate.

[0032] Wherein, the modified calcium hydroxide is obtained through the following steps: the calcium carbide is washed and then dried, passed through a 300-mesh sieve after being pulverized by a grinder, and then calcined in a vacuum furnace at 400°C for 2 hours, cooled naturally to obtain calcium carbide treatment Slag, calcium carbide treatment slag is slowly added to deionized water, the weight ratio of the calcium carbide treatment slag and deionized water is 1:5 Use a 1000r / min magnetic stirrer to stir the above solution, stir for 6min, let stand for 40min, and mix the solution After filtering, drying at room temperature to obtain modified calcium hydroxide.

[0033] In the present embodiment, described a kind of preparation method of calcium oxide, the steps are as fol...

Embodiment 3

[0041] A calcium oxide is prepared from the following raw materials according to the amount of substances: 45 mol of ammonium chloride, 12 mol of modified calcium hydroxide and 14 mol of sodium carbonate.

[0042] Wherein, the modified calcium hydroxide is obtained through the following steps: the calcium carbide is washed and then dried, passed through a 260-mesh sieve after being pulverized by a grinder, and then calcined in a vacuum furnace at 355°C for 1.2 hours, and cooled naturally to obtain calcium carbide To treat the slag, slowly add the calcium carbide treated slag into the deionized water, the weight ratio of the calcium carbide treated slag to the deionized water is 1:5, use a 1000r / min magnetic stirrer to stir the above solution, stir for 4.5min, let stand for 25min, The solution is filtered, and then dried at room temperature to obtain modified calcium hydroxide.

[0043] In the present embodiment, described a kind of preparation method of calcium oxide, the step...

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Abstract

The invention discloses calcium oxide which is prepared from the following raw materials in accordance with the amount of substances: 40-60mol of ammonium chloride, 10-20mol of modified calcium hydroxide and 10-20mol of sodium carbonate, wherein the modified calcium hydroxide is obtained by the following steps: cleaning calcium carbide, drying the cleaned calcium carbide, grinding the dried calcium carbide by using a grinder, performing screening with a 250-300-mesh sieve, performing calcining treatment in a vacuum furnace at 350-400 DEG C for 1-2 hours, performing natural cooling so as to obtain calcium carbide treatment slag, slowly adding the calcium carbide treatment slag s to deionized water, stirring the solution by using a magnetic mixer of 1000r / min for 4-6 minutes, allowing the solution to stand for 20-40 minutes, filtering the solution, and drying the filtered solution at normal temperature, so as to obtain the modified calcium hydroxide. Compared with the prior art, the calcium oxide and the preparation method thereof have the beneficial effects that the size of the calcium oxide material prepared by the preparation method disclosed by the invention can reach a micron order, has very good surface activity and adsorption capacity, and can be widely used as adsorbents and sludge removers in wastewater treatment, sulfur-fixing agents in desulfurization technology, hightemperature carbon dioxide removal agents, filling agents, and the like.

Description

technical field [0001] The invention relates to the technical field of materials science, in particular to calcium oxide and a preparation method thereof. Background technique [0002] Micron is the length dimension, and 1 micron is also counted as 1 μm, which is equivalent to one-thousandth of a millimeter. It can be used as a unit of measurement for material particle size. In a broad sense, particles reaching the micron level refer to at least one dimension in three-dimensional space. Materials in the range of micron scale (0.1 μm-100 μm) or composed of them as basic units. For calcium oxide, the particle size of the material reaches the micron level, which can make calcium oxide have strong surface activity and adsorption capacity. When used as an adsorbent and decontamination agent, it can double the adsorption and decontamination capabilities, so it is widely used However, the current preparation process is relatively complicated, the manufacturing cost is high, and it...

Claims

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Application Information

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IPC IPC(8): C01F11/06
CPCC01F11/06C01P2004/61
Inventor 郑庆路
Owner 唐山市丰南区奉岗灰业有限公司