Method for preparing industrial ultra-fine activated calcium carbonate from carbide slag

A technology of activated calcium carbonate and carbide slag, applied in the direction of calcium carbonate/strontium/barium, etc., can solve the problem of increasing the added value of carbide slag, achieve the effect of improving utilization rate and value, cheap price, and increasing added value

Active Publication Date: 2013-07-03
ANHUI YOUSHENGMEI NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process can increase the added value of carbide slag production, effectively solve the problem of environmental pollution, and greatly improve the utilization rate and value of carbide slag

Method used

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  • Method for preparing industrial ultra-fine activated calcium carbonate from carbide slag
  • Method for preparing industrial ultra-fine activated calcium carbonate from carbide slag
  • Method for preparing industrial ultra-fine activated calcium carbonate from carbide slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Embodiment 1: use n-butanol as co-surfactant, oleic acid as surfactant, adopt microemulsion to prepare industrial superfine active calcium carbonate from calcium carbide slag

[0061] Weigh 30g of calcium carbide slag (Liuzhou Chemical Industry Co., Ltd., with reference to the national standard GB25572-2010, the content of calcium hydroxide is 85.2% pre-measured by complexometric titration with disodium EDTA), put it into the reaction kettle, and add 10mL Wet with water, and slowly add 130ml of saturated ammonium chloride solution (100ml of water contains 40g of ammonium chloride) dropwise under the condition of a hot water bath at 30°C, and control the pH value of the solution at about 7.1-8. After stirring for 80 minutes, the reaction was completed, and the insoluble impurities were removed by filtration to obtain 230ml of calcium chloride solution, in which the concentration of calcium ions was 1.375mol / L (measured by complexometric titration with calcium indicator ED...

Embodiment 2

[0063] Embodiment 2: use the oil phase and water phase that embodiment 1 obtains, adopt microemulsion to obtain industrial superfine active calcium carbonate from calcium carbide slag

[0064] Weigh 30g of calcium carbide slag (Liuzhou Chemical Industry Co., Ltd., with reference to the national standard GB25572-2010, the content of calcium hydroxide is 85.2% pre-measured by complexometric titration with disodium EDTA), put it into the reaction kettle, and add 10mL Wet with water, and slowly add 130ml of saturated ammonium chloride solution (100ml of water contains 40g of ammonium chloride) dropwise under the condition of a hot water bath at 40°C, and control the pH value of the solution at about 7.1-8. After stirring for 80 minutes, the reaction was completed, and the insoluble impurities were removed by filtration to obtain 205ml of calcium chloride solution, wherein the concentration of calcium ions was 1.588mol / L (measured by complexometric titration with calcium indicator E...

Embodiment 3

[0066] Embodiment 3: use the oil phase and water phase that embodiment 2 obtains, adopt microemulsion to obtain industrial superfine active calcium carbonate from calcium carbide slag

[0067]Weigh 30g of calcium carbide slag (Liuzhou Chemical Industry Co., Ltd., with reference to the national standard GB25572-2010, the content of calcium hydroxide is 85.2% pre-measured by complexometric titration with disodium EDTA), put it into the reaction kettle, and add 10mL Wet with water, slowly add 130ml of saturated ammonium chloride solution (100ml of water contains 40g of ammonium chloride) dropwise in a hot water bath at 60°C, and control the pH value of the solution at about 6-8. After stirring for 80 minutes, the reaction was completed, and the insoluble impurities were removed by filtration to obtain 212ml of calcium chloride solution, wherein the concentration of calcium ions was 1.457mol / L (measured by complexometric titration with calcium indicator EDTA), and the leaching rate...

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Abstract

The invention discloses a method for preparing industrial ultra-fine activated calcium carbonate from a carbide slag, and particularly relates to preparation of employing O/W-type microemulsion. The technology disclosed by the invention comprises the steps of extracting calcium in the carbide slag by saturated ammonium chloride solution, and separating undissolved impurities to filter and obtain calcium chloride solution; reacting fatty acid and alkyl alcohol with sodium hydroxide solution, and adding petroleum ether to form microemulsion; fining microemulsion particles by ultrasound, slowly dripping the obtained calcium chloride solution under an agitation condition, dripping carbonate or bicarbonate solution after dripping, thereby respectively obtaining an upper layer of oil phase, a middle layer of opaque oil phase containing calcium carbonate sediment, and a lower layer of water phase after reaction and delivery are finished; and centrifugally separating, washing and drying the middle layer to obtain industrial ultra-fine activated calcium carbonate, wherein the oil phase and the water phase can be recovered to apply mechanically. By adopting the method, the processing problem of the carbide slag can be well solved; the obtained oil phase and water phase can be recycled; the cost is saved; the prepared light calcium carbonate surface is coated with a layer of fatty acid; the dispersibility is good; the problem that the product is easily gathered is solved; and the method has economical, social and environment-friendly concepts.

Description

technical field [0001] The invention relates to a simple and economical new process for preparing industrial ultrafine active calcium carbonate, in particular to prepare industrial ultrafine active calcium carbonate by using carbide slag as a raw material and adopting an O / W microemulsion method. Background technique [0002] Calcium carbide is an important chemical raw material. When calcium carbide is used to produce acetylene and related chemical products, such as polyvinyl chloride, vinylon, carbon black and other products, a large amount of calcium carbide slag will be discharged. The main component of calcium carbide slag is calcium hydroxide, and it also contains calcium carbonate, silicon dioxide, carbon slag, iron oxide, aluminum oxide, magnesium oxide and other impurities. Due to its complex composition and odor, it has caused serious pollution to the surrounding environment. It is the focus and difficulty of clean production and resource recycling in my country, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/18
Inventor 周密董卫龙董楷文钱欣
Owner ANHUI YOUSHENGMEI NEW MATERIAL TECH CO LTD
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