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Method for preparing dendritic calcium hydroxide

A calcium hydroxide, dendritic technology, applied in the direction of calcium/strontium/barium oxide/hydroxide, etc., can solve the problem of different particle sizes, difficult physical reinforcement of polymer materials, uneven distribution, etc. problems, to achieve the effect of strengthening mechanical properties, changing difficult to save, and wide application prospects

Inactive Publication Date: 2008-04-30
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the use of traditional calcium hydroxide prepared by direct digestion of quicklime has a certain negative impact on the application in the plastics industry due to the different particle sizes, poor dispersion and uneven distribution. It is found in practice that direct digestion prepares Calcium hydroxide, before blending with plastics, is easy to react with carbon dioxide in the air, reducing the environmental effect of calcium hydroxide, and its particles are mainly round, and it is difficult to physically reinforce polymer materials.

Method used

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  • Method for preparing dendritic calcium hydroxide

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Effect test

Embodiment 1

[0018] Put 100mL 0.8g / L PAM solution in the reaction kettle, the frequency is 40KHz, the power is 100W / cm 2 Ultrasonic vibration for 5 minutes; add 0.444g calcium chloride, ultrasonic 0.5h, fully dissolved, at this time the calcium ion concentration in the solution is 0.04mol / L; stand still for 12h, add 0.416g sodium hydroxide after ultrasonic 5min, make the solution [ Na + ]: [Ca 2+ ]=2.6:1,; ultrasonic for 30min, after 1h of reaction, the solution was moved to an aluminum substrate container, and heated and dried under the irradiation of an infrared lamp. During this process, the temperature of the solution was controlled at 50°C. Spike calcium hydroxide.

Embodiment 2

[0020] Put 100mL of 1.0g / L PAM solution in the reactor, the frequency is 40KHz, the power is 100W / cm 2 Ultrasonic oscillation for 5min; take and add 1.889g calcium nitrate (Ca(NO 3 ) 2 4H 2 0), ultrasonic 0.5h, fully dissolving, the calcium ion concentration is 0.08mol / L in the solution at this moment; Leave standstill 12h, add 0.96g sodium hydroxide after ultrasonic 5min, make [Na in the solution + ]: [Ca 2+ ] = 3:1, ultrasonic for 30 minutes, after 2 hours of reaction, the solution was transferred to an aluminum substrate container, and heated and dried under the irradiation of an infrared lamp. During this process, the temperature of the solution was controlled at 100 ° C, and the powdery product, namely dendrites, was collected after complete drying calcium hydroxide.

Embodiment 3

[0022] Put 100mL 0.4g / L PAM solution in the reaction kettle, the frequency is 40KHz, the power is 100W / cm 2 Ultrasonic oscillation for 5min; add 0.949g anhydrous calcium acetate (Ca(CH 3 COO) 2 ), ultrasonication for 0.5h, fully dissolved, at this time the concentration of calcium ions in the solution was 0.06mol / L; standing for 12h, adding 0.48g sodium hydroxide after ultrasonication for 5min, so that [Na + ]: [Ca 2+ ]=2:1, ultrasonic for 30min, after 2h of reaction, the solution was moved to an aluminum base container, and heated and dried under the irradiation of an infrared lamp. During this process, the temperature of the solution was controlled at 75°C. calcium hydroxide.

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Abstract

The invention relates to a process for preparing Dendritic Cell calcium hydrate by using water-soluble polyacrylamide template agent. The technical scheme of the invention comprises dissolving 0.4-1.0g / L polyacrylamide into water, adding 0.004-0.008mol soluble calcium salt and 0.008-0.024mol caustic soda solution into the polyacrylamide (PAM) solution, vibrating for four times via ultrasonic wave, to form a calcium hydrate suspension, and then drying the calcium hydrate suspension to prepare Dendritic Cell calcium hydrate particles. The frequency of the ultrasonic wave is 40 KHz while the power is 100W / cm2, the first vibration costs 5min, the second vibration costs 30min, the third vibration costs 4min, and the fourth vibration costs 30min. The product is heated and dried at 50-100DEG C. The invention uses novel synthesis line and technique, finds needed drying substrate, and synthesizes Dendritic Cell calcium hydrate particles. Via the analysis of modern machine, the synthesized calcium hydrate particles have special Dendritic Cell structure, which blending adsorption ability with plastic is improved significantly.

Description

technical field [0001] The invention relates to a method for preparing calcium hydroxide, in particular to a method for preparing dendritic cell calcium hydroxide by drying a water-soluble polyacrylamide template on an aluminum substrate. Background technique: [0002] Calcium hydroxide is one of the important absorbents in the flue gas desulfurization industry and one of the main absorbents for acidic gases in the treatment of solid waste incineration tail gas. It is in the form of white powder; To solve the problem of smoke pollution, people also consider adding calcium hydroxide to plastics as a modifier, which not only increases the environmental tolerance of plastics, but also can be used as part of absorbents in the process of plastics being incinerated as garbage Acidic harmful gas. [0003] However, the use of traditional calcium hydroxide prepared by direct digestion of quicklime has a certain negative impact on the application in the plastics industry due to the d...

Claims

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Application Information

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IPC IPC(8): C01F11/02
Inventor 陈庆华蒋亚兵许兢肖荔人刘欣萍黄宝铨
Owner FUJIAN NORMAL UNIV
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