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CN-116715265-B - Superfine BaSO4/TiO2Preparation method of composite material

CN116715265BCN 116715265 BCN116715265 BCN 116715265BCN-116715265-B

Abstract

The invention belongs to the field of barium sulfate compounds, and particularly relates to a preparation method of an ultrafine BaSO 4 /TiO 2 composite material. The method comprises the steps of 1, adding a composite modifier into barium carbonate slurry, adding Na 2 SO 4 solution, carrying out ultrasonic reaction, 2, adding titanyl sulfate, carrying out ultrasonic reaction, filtering, washing and drying to obtain the superfine BaSO 4 /TiO 2 composite material. The invention directly coats the titanium dioxide generated by the hydrolysis of the titanyl sulfate on the superfine barium sulfate particles modified by the composite surfactant, has simple process, cyclic utilization of resources, economy, environmental protection and no waste generation, can effectively control the size and the performance of the superfine barium sulfate, and is suitable for industrial production and application.

Inventors

  • LI YUXIA
  • ZHANG BAOZHU

Assignees

  • 晋中学院

Dates

Publication Date
20260505
Application Date
20230602

Claims (9)

  1. 1. The preparation method of the superfine BaSO 4 /TiO 2 composite material is characterized by comprising the following steps of: Step 1, adding a composite modifier into barium carbonate slurry, and then adding Na 2 SO 4 solution for ultrasonic reaction; Adding titanyl sulfate, continuing ultrasonic reaction, filtering, washing and drying to obtain the superfine BaSO 4 /TiO 2 composite material; In the step 1, the composite modifier is a composite surface modifier obtained by compounding glycoside citrate APG-EC and narrow-distribution fatty alcohol polyoxyethylene ether AEO 9 , monoalkyl dimethyl hydroxyethyl ammonium chloride or narrow-distribution AEO 9 sulfosuccinate disodium salt according to a mass ratio of 1:1-1:3.
  2. 2. The method for preparing an ultrafine BaSO 4 /TiO 2 composite according to claim 1, wherein in the step 1, the mass concentration of the barium carbonate slurry is 30%.
  3. 3. The method for preparing an ultrafine BaSO 4 /TiO 2 composite material according to claim 1, wherein in the step 1, the addition amount of the composite modifier is 5% to 1% of the content of barium carbonate.
  4. 4. The method for preparing an ultrafine BaSO 4 /TiO 2 composite material according to claim 1, wherein in the step 1, the molar ratio of barium carbonate to sodium sulfate is 1:1 to 1:1.5.
  5. 5. The method for preparing an ultrafine BaSO 4 /TiO 2 composite material according to claim 1, wherein in the step 1, the mass concentration of the Na 2 SO 4 solution is 20% -40%.
  6. 6. The method for preparing the superfine BaSO 4 /TiO 2 composite material according to claim 1, wherein in the step 1, the power of ultrasonic reaction is 1000-2000W, the reaction temperature is 30-50 ℃, and the reaction time is 2-8 h.
  7. 7. The method for preparing an ultrafine BaSO 4 /TiO 2 composite according to claim 1, wherein in the step 2, the amount of the titanyl sulfate is 0.05 to 0.5 times the amount of the barium carbonate.
  8. 8. The method for preparing the superfine BaSO 4 /TiO 2 composite material according to claim 1, wherein in the step 2, the power of the ultrasonic reaction is 500-1000w, the reaction temperature is 30-50 ℃, and the reaction time is 0.5-1 h.
  9. 9. The method for preparing the superfine BaSO 4 /TiO 2 composite material according to claim 1, wherein in the step 2, the particle size of the superfine BaSO 4 /TiO 2 composite material is 100-300 nm, the whiteness is 95-98%, and the specific surface area is 20-50 g/cm 2 .

Description

Preparation method of superfine BaSO 4/TiO2 composite material Technical Field The invention belongs to the field of barium sulfate compounds, and particularly relates to a preparation method of an ultrafine BaSO 4/TiO2 composite material. Background Barium sulfate is widely used in the fields of paint, ink, rubber, medicine, plastics, textile, drilling and the like because of the advantages of high whiteness, high chemical stability, abundant resources, low price and the like. In recent years, as the application field continuously upgrades the products, the common barium sulfate has the defects of large particle size, uneven distribution, single surface property, higher impurity content, large batch-to-batch variability and the like, which cannot meet the product requirements. Some superfine functional barium sulfate preparation technologies meeting market requirements are managed and developed, and a high-added-value barium sulfate micropowder production line is established, so that the market competitiveness of barium sulfate in China is improved. Patent document CN106976900B discloses that barium sulfate is prepared by reacting barite reduced to barium sulfide by calcination with a mirabilite solution from which impurities such as calcium and magnesium have been removed, and the newly generated barium sulfate crystal nucleus is surface-modified by surface modification and dispersing agent sodium stearate, and the barium sulfate particles are further surface-modified by adopting a surface modifier high molecular polymer, so that the barium sulfate particles can be effectively combined with organic high molecules in the powder coating and well dispersed in the coating. The barium sulfate prepared by the method is used for producing the powder coating, and has the advantages of high whiteness, good leveling property, uniform dispersion and the like. Patent document CN103881418B discloses that barium sulfate particles with particle size of 10-1000nm are prepared by taking barium sulfate slurry as raw material and adding lubricant, modifier, dispersant, coupling agent, heat stabilizer, antioxidant and the like. Patent document CN101418140B discloses that barium sulfate powder suspension obtained by subjecting barium carbonate, sulfuric acid solution and release agent to synthesis reaction is subjected to curing, separation, washing, pulping, then surface modification treatment and drying to obtain a finished product. However, the technical process is complex in route, high in equipment investment and not easy for industrialized production. Therefore, development of a technology for preparing ultrafine functional barium sulfate which is simple in process and easy to apply industrially is needed. Disclosure of Invention In order to solve the technical problems in the prior art, the invention provides a preparation method of the surfactant modified superfine BaSO 4/TiO2 composite material, which has the advantages of simple process, resource recycling, no pollution to the environment and easy industrialized application. In order to achieve the above purpose, the present invention is realized by the following technical scheme: a preparation method of an ultrafine BaSO 4/TiO2 composite material comprises the following steps: Step 1, adding a composite modifier into barium carbonate slurry, and then adding Na 2SO4 solution for ultrasonic reaction; And 2, adding titanyl sulfate, continuing ultrasonic reaction, filtering, washing and drying to obtain the superfine BaSO 4/TiO2 composite material. The preparation reaction formula of the method is as follows: BaCO3 + Na2SO4 ＝ BaSO4 + Na2CO3 (1) TiOSO4 + H2O ＝ TiO2 + H2SO4 (2) BaCO3 + H2SO4＝ BaSO4 +H2O+CO2 (3) Na2CO3 + H2SO4＝ Na2SO4 +H2O+CO2 (4) Preferably, in the step 1, the mass concentration of the barium carbonate slurry is 30%. Preferably, in the step 1, the composite modifier is a composite surface modifier obtained by compounding glycoside citrate APG-EC and narrow-distribution fatty alcohol polyoxyethylene ether AEO 9, monoalkyl dimethyl hydroxyethyl ammonium chloride or narrow-distribution AEO 9 sulfosuccinate disodium salt according to a mass ratio of 1:1-1:3. Preferably, in the step 1, the addition amount of the composite modifier is 1 to 5 per mill of the content of barium carbonate. Preferably, in the step 1, the molar ratio of the barium carbonate to the sodium sulfate is 1:1 to 1:1.5. Preferably, in the step 1, the mass concentration of the Na 2SO4 solution is 20% -40%. Preferably, in the step 1, the power of the ultrasonic reaction is 1000-2000 w, the reaction temperature is 30-50 ℃, and the reaction time is 2-8 h. Preferably, in the step2, the amount of the titanyl sulfate is 0.05 to 0.5 times the amount of the barium carbonate. Preferably, in the step 2, the power of the ultrasonic reaction is 500-1000w, the reaction temperature is 30-50 ℃, and the reaction time is 0.5-1 h. Preferably, in the step 2, the particle size of the superfine BaSO 4/TiO2 compo