Barium sulfate material and preparation method thereof
A barium sulfate, sodium sulfate aqueous solution technology, applied in chemical instruments and methods, calcium/strontium/barium sulfate, nanotechnology for materials and surface science, etc. Poor effect, poor hydrophobicity and dispersibility of barium sulfate, etc., to achieve excellent hydrophobicity and particle size controllability, ensure hydrophobicity, and meet mixing requirements.
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[0023] The present invention provides a method for preparing barium sulfate material, including the following steps:
[0024] (1) In the membrane dispersion microreactor, the continuous phase and the dispersed phase are mixed to obtain a mixed solution; the continuous phase is a barium chloride aqueous solution, and the dispersed phase is a mixture of sodium sulfate aqueous solution and surfactant-containing ethanol solution mixture;
[0025] (2) Perform precipitation reaction on the mixed solution obtained in step (1) to obtain a barium sulfate suspension;
[0026] (3) The barium sulfate suspension obtained in step (2) is subjected to an aging reaction to obtain a barium sulfate material.
[0027] In the present invention, the continuous phase and the dispersed phase are preferably prepared first.
[0028] In the present invention, the continuous phase is an aqueous solution of barium chloride. In the present invention, the concentration of the barium chloride aqueous solution is pre...
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[0043] Example 1
[0044] (1) In the membrane dispersion microreactor, the dispersed phase is passed through the microporous membrane at a flow rate of 20 mL / min, and quickly mixed with the continuous phase flowing at a flow rate of 20 mL / min to obtain a mixed solution; the continuous phase is the concentration Is a 0.2mol / L barium chloride aqueous solution, and the dispersed phase is a mixed solution of 0.4mol / L sodium sulfate aqueous solution and 0.5mmol / L sodium stearate ethanol solution in a volume ratio of 1:1; The micropore equivalent diameter of the microporous membrane in the membrane dispersion reactor is 5μm;
[0045] (2) Pass the mixed solution through a coil with an outer diameter of 3 cm and a length of 1.5 meters and perform a precipitation reaction. The temperature of the precipitation reaction is 50° C., and the precipitation reaction product flows into a stirred tank to continue stirring to obtain a barium sulfate suspension;
[0046] (3) Place the barium sulfate su...
Example Embodiment
[0048] Example 2
[0049] (1) In the membrane dispersion microreactor, the dispersed phase is passed through the microporous membrane at a flow rate of 20 mL / min, and quickly mixed with the continuous phase flowing at a flow rate of 20 mL / min to obtain a mixed solution; the continuous phase is the concentration It is a 0.1mol / L barium chloride aqueous solution, and the dispersed phase is a mixed solution of 0.2mol / L sodium sulfate aqueous solution and 1mmol / L sodium stearate ethanol solution in a volume ratio of 1:1; the film The microporous equivalent diameter of the microporous membrane in the dispersion reactor is 2μm;
[0050] (2) Pass the mixed solution through a coil with an outer diameter of 3 cm and a length of 1.5 meters and perform a precipitation reaction. The temperature of the precipitation reaction is 50°C; the precipitation reaction product flows into a stirred tank and continues to stir to obtain a barium sulfate suspension;
[0051] (3) Place the barium sulfate susp...
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