Preparation process of barium sulfate
A preparation process, barium sulfate technology, applied in the direction of calcium/strontium/barium sulfate, etc., can solve the problems of high cost and large amount of surfactant, and achieve the effect of reducing dosage, reducing production cost, and uniform particle size
Pending Publication Date: 2022-07-29
FOSHAN GEMME SPECIALTY CHEM TECH CO LTD
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Problems solved by technology
[0003] At present, there are many methods for preparing barium sulfate particles, mainly including gas phase method, solid phase method, and liquid phase method, among which the liquid phase method is the main method, and the water-in-oil microemulsion method in the liquid phase method is easy to operate. , simple equipment, easy control of particle size and shape, etc., are favored by the majority, but when preparing barium sulfate particles in the prior art, the amount of surfactant is large and the cost is high
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Embodiment 1
[0031] combine figure 1 , a preparation technique of barium sulfate, comprises the following steps:
[0032] A: A microemulsion is formed by stirring water, cyclohexane and isopropanol with a mass ratio of 36:6:4 at 25°C;
[0033] B: respectively mixing sodium sulfate solution and barium chloride solution with microemulsion to form sodium sulfate mixed emulsion with sodium sulfate concentration of 0.5mol / L and barium chloride mixed emulsion with barium chloride concentration of 0.6mol / L;
[0034] C: Extract the sodium sulfate mixed emulsion and the barium chloride mixed emulsion according to the volume ratio of 1:1.2, add the barium chloride mixed emulsion into the stirring tank and heat it to 60°C, keep at 60°C and add it to the barium chloride mixed emulsion The sodium sulfate mixed emulsion was stirred for 30 minutes, and the stirring rate was 400 r / min. During the stirring process, dilute hydrochloric acid was added to keep the pH value of the stirring liquid stable at 5....
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Abstract
The invention relates to the technical field of preparation of barium sulfate, and particularly discloses a preparation process of barium sulfate, which comprises the following steps: A, stirring water, cyclohexane and short-chain alcohol according to a certain mass ratio to form microemulsion; b, respectively mixing a sodium sulfate solution and a barium chloride solution with the microemulsion to form a sodium sulfate mixed emulsion and a barium chloride mixed emulsion; c, extracting the sodium sulfate mixed emulsion and the barium chloride mixed emulsion according to a certain ratio, heating and stirring to form a suspension, and aging the suspension; d, centrifuging the aged suspension to obtain a filter cake; e, washing the filter cake; f, the washed filter cake is dried, superfine barium sulfate with the small particle size can be prepared without adopting a surfactant, and the production cost is effectively reduced.
Description
technical field [0001] The invention relates to the technical field of barium sulfate preparation, in particular to a preparation process of barium sulfate. Background technique [0002] Barium sulfate is an inorganic material with excellent properties. It has the advantages of acid and alkali resistance, high reflectivity, excellent electrical conductivity, and stable chemical properties. Therefore, it has a wide range of applications in cosmetics, papermaking, paint, contrast agents and other industries. The nano-barium sulfate particles with small particle size, narrow particle size distribution, good regularity and excellent dispersibility are important indicators to obtain excellent performance, so they have high economic value and broad market prospects. [0003] At present, there are many methods for preparing barium sulfate particles, mainly including gas phase method, solid phase method, liquid phase method, etc. Among them, the liquid phase method is the main metho...
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IPC IPC(8): C01F11/46
CPCC01F11/462C01P2006/80C01P2004/62
Inventor 胡远飞
Owner FOSHAN GEMME SPECIALTY CHEM TECH CO LTD