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Oxide coated titanium dioxide materials and method for preparing same

A technology of titanium dioxide and oxides, applied in chemical instruments and methods, fibrous fillers, inorganic pigment treatment, etc., can solve problems not involved in the production of colored titanium dioxide raw materials

Active Publication Date: 2008-08-13
NANJING TITANIUM DIOXIDE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing titanium dioxide coating mainly involves protecting the surface of titanium dioxide particles, and does not involve the production of colored titanium dioxide raw materials for special pigments

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] A kind of preparation method of colored titanium dioxide for oscilloscope tube of the present invention comprises following processing step:

[0029] (1) Use finished anatase titanium dioxide products that meet the following technical indicators as raw materials, and perform beating and dispersion at a temperature of 60±5°C, and ensure that TiO in the solution after beating 2 The concentration is 15±5%, then add Fe at the temperature of 75±5℃ 2 o 3 Stir with iron trichloride or ferrous sulfate equivalent to 33±2% titanium dioxide;

[0030] (2) Neutralize the stirred solution with industrial grade NaOH or KOH, and control the pH to be 6.5 to 7.5 during neutralization;

[0031] (3) Put the slurry neutralized in the previous step at a temperature of 95±20°C for color development and positioning for 30min-3h;

[0032] (4) Precipitate, wash and then dehydrate the product obtained in step 3, and ensure that the washing resistivity is ≥ 80Ωm;

[0033] (5) The material obta...

Embodiment 1

[0047] 1. Titanium dioxide beating concentration: 15.5%

[0048] 2. Temperature control: 62°C

[0049] 3. Addition amount of iron salt (as Fe 2 o 3 Accounted for titanium dioxide) %: 33.5

[0050] 4. NaOH concentration: 19%

[0051] 5. Envelope temperature: 78°C

[0052] 6. Neutralization pH: 7.3

[0053] 7. Color development positioning temperature: 99°C

[0054] 8. Washing resistivity: 85Ωm

[0055] 9. Calcination temperature: 650°C

[0056] 10. Airflow crushing pressure: 6.8Mpa

Embodiment 2

[0058] 1. Titanium dioxide beating concentration: 16%

[0059] 2. Temperature control: 60°C

[0060] 3. Addition amount of iron salt (as Fe 2 o 3 Accounted for titanium dioxide) %: 32

[0061] 4. NaOH concentration: 21%

[0062] 5. Envelope temperature: 75.5°C

[0063] 6. Neutralization pH: 6.9

[0064] 7. Color development positioning temperature: 102°C

[0065] 8. Washing resistivity: 82Ωm

[0066] 9. Calcination temperature: 480°C

[0067] 10. Airflow crushing pressure: 7.8Mpa

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Abstract

The invention relates to a titanic construction material covered by oxide compound, namely titanic grain surface with di-iron trioxide wrapper. The process for preparing includes the following steps: (1) beating and dispersing the anatase type titanium dioxide stock at 60+-10 DEG C, in which the titanium dioxide concentration in the beated solution is 15+-5 %, then adding ferric chloride and ferric persulfate homologous to 33+-2 % of the titanium dioxide according to the quantity of di-iron trioxide to agitate; (2) controlling the PH value to 6.5-7.5; (3) retaining the neutralized serum for 30min-3h at 95+-20 DEG C; (4) cementing out, rinshing and dewatering the product and guaranteeing the water electrical resistivity more than 80 Omegam; (4) burning the substance obtained by step (4) at 500+-200 DEG C, and comminuting to obtain the end product.

Description

technical field [0001] The invention belongs to a production method of colored titanium dioxide, relates to the preparation process of extended products of titanium dioxide products, and specifically relates to an oxide used in the production of oscilloscope tubes, especially ferric oxide-coated titanium dioxide structural material, that is, colored titanium dioxide and its preparation method. Background technique [0002] Titanium dioxide is made by acid hydrolysis with commonly used sulfuric acid method, leaching and reduction, sedimentation, filtration, crystallization separation, hydrolysis, filtration, washing, drying, calcining, crushing and other processes and additives. For example, the manufacturing method of CN96117814.0 rutile type high-purity titanium dioxide has the following technological process: 1. after pulverizing the titanium concentrate, carry out acidolysis reaction with concentrated sulfuric acid for 1 to 5 hours, and add water and auxiliary agents to r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/36C09C3/06
Inventor 彭安铮殷红忠张四清高岭
Owner NANJING TITANIUM DIOXIDE CHEM