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Preparation method of calcium sulfate whiskers

A calcium sulfate whisker and sulfate technology, applied in chemical instruments and methods, single crystal growth, crystal growth, etc., can solve the problems of high production cost and large equipment investment, and achieve simple equipment, simple operation, and mild operating conditions Effect

Active Publication Date: 2016-05-11
烟台远东精细化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the hydrothermal method is a commonly used method in industry, but the existing method has the disadvantages of large equipment investment and high production cost. The present invention provides a production method of calcium sulfate whiskers with low cost, low investment and simple operating conditions.

Method used

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Effect test

Embodiment 1

[0025] A kind of preparation method of embodiment 1 calcium sulfate whiskers, comprises the following steps:

[0026] A. The reaction vessel is divided into two parts by an anion exchange membrane: the cathode chamber and the anode chamber.

[0027] B, add sodium sulfate aqueous solution in the cathode chamber, concentration 5% (mass); Add calcium chloride aqueous solution, concentration 2% (mass) in the anode chamber, both pole chambers all add stirring.

[0028] C. Turn on the DC power supply, the voltage is 4V, the current is 0.25A, and the pH is adjusted to 3,

[0029] D. Acicular calcium sulfate whiskers were obtained in the cathode chamber after applying voltage for 2.5 hours.

[0030] E. Disconnect the DC power supply, continue to stir, and the whiskers continue to grow to obtain calcium sulfate whiskers with an aspect ratio greater than 100.

[0031] attached figure 1 It is a schematic process diagram of a preparation method of calcium sulfate whiskers. attached ...

Embodiment 2

[0032] A kind of preparation method of embodiment 2 calcium sulfate whiskers, the steps are as follows:

[0033] A. Use an anion exchange membrane to divide the reaction vessel into two parts: the cathode chamber and the anode chamber, the cathode chamber plus the cathode plate, and the anode chamber plus the anode plate;

[0034] B, add soluble sulfate aqueous solution (potassium sulfate, mass concentration 10%) in the cathode chamber, add soluble calcium salt solution (calcium nitrate, mass concentration 30%) in the anode chamber, both pole chambers all add stirring; For guaranteeing calcium sulfate crystal To ensure the consistency of the whiskers, calcium ions can be continuously added to the anode chamber, sulfate ions can be added to the cathode chamber, and stirring can be added to both the cathode chamber and the anode chamber.

[0035] C. Turn on the DC power supply and adjust the pH;

[0036] D. Acicular calcium sulfate whiskers are obtained in the cathode chamber a...

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Abstract

The invention provides a preparation of calcium sulfate whiskers. The preparation method comprises the following steps of dividing a reaction vessel into a cathode chamber and an anode chamber by using an anion exchange membrane; adding a cathode plate to the cathode chamber; adding an anode plate to the anode chamber; adding a soluble sulfate water solution into the cathode chamber; adding a soluble calcium salt water solution into the anode chamber; switching on a direct-current power supply; obtaining needle-shaped calcium sulfate whiskers in the cathode chamber after regulating pH (Potential of Hydrogen) and applying voltage.

Description

technical field [0001] The invention belongs to the field of preparing calcium sulfate whiskers, in particular to a method for preparing calcium sulfate whiskers with an ion exchange membrane. Background technique [0002] Calcium sulfate whiskers can be used as inorganic fillers in composite materials, which can increase the strength of the material and have flame-retardant effects. It is environmentally friendly and pollution-free, and is widely used. The current industrial production methods include: (1) hydrothermal heating Method: The raw materials are prepared in a certain ratio to obtain a suspension, and placed in a high-pressure reactor under certain conditions such as temperature, pressure, and pH value to complete the preparation process, and the calcium sulfate whisker product can be obtained. (2) Atmospheric pressure acidification method: Atmospheric pressure acidification method is usually to obtain whisker products with high purity after the gypsum raw materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/46C30B29/62C30B7/12
CPCC30B7/12C30B29/46C30B29/62
Inventor 郝肖梁燕王文华冯咏梅任万忠孙晓宇李云飞
Owner 烟台远东精细化工有限公司
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