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Method for preparing barium titanate from chlorination-process titanium dioxide byproduct hydrochloric acid

A technology of titanium dioxide by-product, barium titanate, applied in chemical instruments and methods, titanate, alkaline earth metal titanate, etc., can solve the problems of low resource utilization efficiency and poor economy, and achieve efficient resource utilization , the effect of improving the economy

Inactive Publication Date: 2020-09-15
YIBIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But generally speaking, there are still problems of low resource utilization efficiency and poor economic efficiency in the utilization of hydrochloric acid by-product of chlorination titanium dioxide.

Method used

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  • Method for preparing barium titanate from chlorination-process titanium dioxide byproduct hydrochloric acid

Examples

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Effect test

Embodiment 1

[0017] Embodiment one: 31.5g industrial barium carbonate (BaCO3) produced by a certain mining company in Chongqing 3 99.2%) and 50g of water are prepared as pulp, which contains 10.2% TiOCl with 200g 2 The by-product hydrochloric acid (concentration of free hydrochloric acid is 21.2%) in the chlorination method titanium dioxide was put into a 500mL three-necked flask, and the temperature was controlled at 60±5°C. After stirring and reacting for 2 hours, Na 2 CO 3 Adjust its pH value to 5.3; then filter and separate the insoluble impurities in the acidolysis solution, then add 2.8g polyethylene glycol to the acidolysis filtrate to heat and keep it above 70°C; at the same time, measure 2mol / L of Put 400mL of NaOH solution into a 1000mL three-necked flask and heat it to 90±5°C. While stirring, gradually add the barium-titanium mixture with polyethylene glycol into the hot alkali solution by dropwise, and the dropwise addition is completed. Finally, keep the pH value of the solu...

Embodiment 2

[0018] Embodiment two: 64g industrial barium carbonate (BaCO3) produced by a mining company in Shaanxi 3 98.6%) and 100g of water are prepared as pulp, which contains 10.2% TiOCl with 400g 2 The by-product hydrochloric acid (concentration of free hydrochloric acid is 21.2%) in the chlorination method titanium dioxide is put into a 1000mL three-necked flask, and the temperature is controlled at 60±5°C. After stirring and reacting for 2 hours, NaOH is added to the three-necked flask to adjust its pH to 4.8; Then filter and separate the insoluble impurities in the acid hydrolysis solution, then add 5.5g polyethylene glycol to the acid hydrolysis filtrate and heat it to keep it above 70°C; Put it in the flask and heat it to 90±5°C, gradually add the barium-titanium mixture with polyethylene glycol into the hot alkali solution by dropwise under stirring, keep the pH value of the solution not low after the dropwise addition is completed React under the condition of 13.5 for 2 hours...

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Abstract

The invention relates to a preparation method of barium titanate. Specifically the method comprises the following steps: carrying out an acidolysis reaction on TiOCl2-containing chlorination-process titanium dioxide byproduct hydrochloric acid and industrial barium carbonate, controlling the Ba / Ti ratio and the pH value in the acidolysis solution, dropwise adding the acidolysis solution into a hotalkali solution, carry out a neutralization reaction, and aging, filtering, washing and calcining after the reaction is finished to obtain a BaTiO3 finished product.

Description

technical field [0001] The invention relates to a production method for preparing barium titanate, which belongs to the field of inorganic chemical industry. Specifically, the use of TiOCl containing 2 The by-product hydrochloric acid of titanium dioxide in the chlorination method undergoes acidolysis reaction with industrial barium carbonate, controls the Ba / Ti ratio and pH value in the acidolysis solution, and then adds it dropwise to the hot alkali solution for neutralization reaction. After the reaction is completed BaTiO can be obtained after aging, filtering, washing and calcination 3 finished product. Background technique [0002] In the production process of titanium dioxide by the chlorination method, there are two kinds of waste acid for washing the tail gas in the chlorination process: one is HCl with a hydrochloric acid concentration of about 20%, which contains TiOCl 2 The concentration is about 10.2%; the other is HCl with a hydrochloric acid concentration o...

Claims

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Application Information

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IPC IPC(8): C01G23/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G23/006C01P2004/64
Inventor 唐红梅邓科
Owner YIBIN UNIV