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A raw material preparation method for the production of decorative base paper titanium dioxide

A technology for decorating base paper and titanium dioxide, applied in chemical instruments and methods, titanium compounds, titanium and titanyl sulfate, etc., can solve the problem of unstable quality of titanium dioxide by sulfuric acid method, unstable acid hydrolysis operation, and unstable quality indicators and other problems, to achieve the effect of stable quality indicators, saving titanium dioxide and stable quality

Active Publication Date: 2019-06-07
HEBEI MILSON TITANIUM DIOXIDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] After more than 80 years of development of intermittent acid hydrolysis technology, the process and equipment are basically finalized, but acid hydrolysis still has the defects of unstable operation, low acid hydrolysis rate, and unstable quality indicators, which is also a main reason for the unstable quality of sulfuric acid process titanium dioxide one
At present, there is no report on the preparation technology of titanium sulfate solution specially used for the production of titanium dioxide for decorative base paper

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] ⑴Titanium ore pre-mixing: ①Titanium ore: 18% fineness 325 mesh sieve, 0 200 mesh sieve; moisture 0.38%; TiO 2 46.45%; Fe 2 o 3 6.83%; temperature 29°C. ②Sulfuric acid: 54.21%; temperature 28°C. ③ Mix according to the mass ratio of sulfuric acid and titanium ore: 0.5, the mixing time is 15 minutes, and the cooling control material temperature is 38°C.

[0033] (2) Initiate acidolysis: Put the pre-mixed materials into the reaction tank, stir, add 98% sulfuric acid according to the mass ratio of sulfuric acid to titanium ore of 1.40, react for 10 minutes, and mature at 80°C for 90 minutes.

[0034] (3) Cooling: The material temperature is cooled to 59°C.

[0035] ⑷Dissolution: according to 0.5m 3 Add 20% dilute sulfuric acid to / t titanium ore, then press 3m 3 / t Add titanium ore to sand and filter water, dissolve for 3 hours. Control the liquid temperature <80°C.

[0036] ⑸Reduction: Add elemental iron powder to the dissolved liquid at 50kgFe / t titanium ore, and t...

Embodiment 2

[0039] ⑴Titanium ore pre-mixing: ①Titanium ore: 16% fineness 325 mesh sieve, 0 200 mesh sieve; moisture 0.32%; TiO 2 47.16%; Fe 2 o 3 7.26%; temperature 28°C. ②Sulfuric acid: 54.53%; temperature 28°C. ③Mix according to the mass ratio of sulfuric acid and titanium ore: 0.55, the mixing time is 20min, and the cooling control material temperature is 36°C.

[0040] (2) Initiate acidolysis: Put the pre-mixed materials into the reaction tank, stir, add 98% sulfuric acid according to the mass ratio of sulfuric acid to titanium ore of 1.35, react for 12 minutes, and mature at 90°C for 60 minutes.

[0041] (3) Cooling: Cool the material temperature to 62°C.

[0042] ⑷ Dissolution: according to 0.4m 3 Add 20% dilute sulfuric acid to / t titanium ore, and press 2.5m 3 / t Add titanium ore to sand and filter water, dissolve for 2 hours. Control the liquid temperature <80°C.

[0043] ⑸Reduction: Add elemental iron powder to the dissolved liquid at 60kgFe / t titanium ore, and the react...

Embodiment 3

[0046] ⑴Titanium ore pre-mixing: ①Titanium ore: 12% fineness 325 mesh sieve, 0 200 mesh sieve; moisture 0.30%; TiO 2 46.82%; Fe 2 o 35.49%; temperature 28°C. ② Sulfuric acid: 50.52%; temperature 28°C. ③According to the mass ratio of sulfuric acid and titanium ore: 0.5, mixing, mixing time 10min, cooling control material temperature 35 ℃.

[0047] (2) Initiate acidolysis: Put the pre-mixed materials into the reaction tank, stir, add 98% sulfuric acid according to the mass ratio of sulfuric acid to titanium ore of 1.20, react for 10 minutes, and mature at 100°C for 70 minutes.

[0048] (3) Cooling: Cool the material temperature to 55°C.

[0049] ⑷ Dissolution: according to 0.7m 3 Add 20% dilute sulfuric acid to / t titanium ore, then press 3m 3 / t Add titanium ore to sand and filter water, dissolve for 3 hours. Control the liquid temperature <80°C.

[0050] ⑸Reduction: Add elemental iron powder to the dissolved liquid at 50kgFe / t titanium ore, and the reaction time is 1.2...

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Abstract

The invention provides a preparation method of a raw material for producing titanium dioxide of decorative base paper, and belongs to the technical field of titanium dioxide of decorative base paper. The method comprises the following steps: A, selecting titanium ore of which the residue on sieve is 10.0-20.0% under 325 meshes and the residue on sieve is 0 under 200 meshes, the water content is not greater than 0.5%, TiO2 is not less than 45%, Fe2O3 is not greater than 8%, and the temperature is not greater than 40 DEG C; selecting sulfuric acid on the concentration of 30-55% and under the temperature of being not greater than 40 DEG C; mixing sulfuric acid and titanium ore; cooling to obtain a titanium ore pre-mixed material; B, feeding the titanium ore pre-mixed material into a reaction tank; stirring; adding sulfuric acid on the concentration of 98%; reacting; then curing; C, cooling the cured material; adding dilute sulphuric acid; then adding sand filtering water to dissolve; D, adding zero-valent iron powder to the dissolved liquid to react; E, precipitating the liquid obtained in the reaction in step D; collecting supernate; filtering to obtain titanous sulfate containing not greater than 30mg / L of filtrate solid content. The method is stable to operate, high in acidolysis rate, stable in quality index, and stable in quality of titanium dioxide prepared by the sulfuric acid method.

Description

technical field [0001] The invention belongs to the technical field of titanium dioxide for decorative base paper, and relates to a raw material titanium sulfate solution for titanium dioxide for decorative base paper, in particular to a raw material preparation method for producing titanium dioxide for decorative base paper. The preparation method of the invention has stable operation, high acid hydrolysis rate and stable quality index, and the titanium dioxide prepared by the sulfuric acid method has stable quality. Background technique [0002] At present, there are two methods for producing titanium dioxide for decorative base paper, one is the chlorination method, and its main raw material is gaseous TiCl 4 ; One is sulfuric acid method, its main raw material is liquid phase TiOSO 4 and Ti(SO 4 ) 2 Mixture (titanium sulfate solution). The production of titanium dioxide for decorative base paper in foreign countries is mainly produced by the chlorination method, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/00
CPCC01G23/008
Inventor 张建平张川张千张潇
Owner HEBEI MILSON TITANIUM DIOXIDE
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