Method for preparing food-level titanium dioxide

A titanium dioxide, food-grade technology, applied in the field of preparing food-grade titanium dioxide, can solve problems such as hidden safety hazards, low output, and unguaranteed edible titanium dioxide quality, and achieve the effects of product quality assurance, product quality, and easy removal of impurities

Inactive Publication Date: 2010-12-22
JIANGSU HONGYUAN PHARMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The quality of edible titanium dioxide obtained by this procedure is not guaranteed, and the output is not high. Since all products can not be guaranteed to be fully tested, there are certain potential safety hazards.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Mix 3Kg titanium dioxide (i.e. industrial grade titanium dioxide) and 1 Kg deionized water evenly first, then add 0.0048 Kg hydrogen peroxide, 0.0024 Kg formic acid, 0.0012 Kg ammonium acetate and 0.12 Kg nitric acid after 5 minutes, and let it stand for 3 hours after reacting for 2 hours. hour, then add 23Kg deionized water, mix evenly, carry out suction filtration and drying treatment, the drying process is at 300°C for more than 1 hour, and then pulverize to obtain a food-grade titanium dioxide product. Nitric acid adopts commercially available fuming nitric acid, and hydrogen peroxide, formic acid, ammonium acetate and deionized water are commercially available reagent grade products.

[0016] Below is the performance index comparison of the product of the present invention and the present like product after testing.

[0017] project

Embodiment 2

[0019] Mix 4Kg titanium dioxide and 1 Kg deionized water evenly first, then add 0.005Kg hydrogen peroxide, 0.003 Kg formic acid, 0.002 Kg ammonium acetate and 0.15 Kg nitric acid after 5 minutes. Ionized water, after mixing evenly, carry out suction filtration and drying treatment. The drying process is kept at 300°C for more than 1 hour, and then crushed to obtain food-grade titanium dioxide products. Nitric acid adopts commercially available fuming nitric acid, and hydrogen peroxide, formic acid, ammonium acetate and deionized water are commercially available reagent grade products.

[0020] Below is the performance index comparison of the product of the present invention and the present like product after detection.

[0021] project

Embodiment 3

[0023] Mix 5Kg titanium dioxide and 1 Kg deionized water evenly first, then add 0.02Kg hydrogen peroxide, 0.01Kg formic acid, 0.01 Kg ammonium acetate and 0.5Kg nitric acid after 5 minutes, wait for 2 hours to react and let stand for 3 hours, then add 40Kg to remove Ionized water, after mixing evenly, carry out suction filtration and drying treatment. The drying process is at 300°C for more than 1 hour, and then crushed to obtain food-grade titanium dioxide products. Nitric acid adopts commercially available fuming nitric acid, and hydrogen peroxide, formic acid, ammonium acetate and deionized water are commercially available reagent grade products.

[0024] Below is the performance index comparison of the product of the present invention and the present like product after detection.

[0025] project

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PUM

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Abstract

The invention relates to a method for preparing food-level titanium dioxide, which is characterized by comprising the following steps of: uniformly mixing titanium white and deionized water in a weight part ratio of 3-8:1, adding 0.0048 to 0.064 weight part of hydrogen peroxide, 0.0024 to 0.32 weight part of formic acid, 0.0012 to 0.128 weight part of ammonium acetate and 0.12 to 0.64 weight part of nitric acid, performing reaction, standing for a period of time, adding 23 to 63 weight parts of deionized water, performing suction filtration and drying treatment, and crushing to obtain the food-level titanium dioxide product. Impurities in the industry titanium dioxide can be removed easily by the method; and the prepared product is the food-level titanium dioxide, and has the advantages of high yield and guaranteed quality.

Description

technical field [0001] The invention relates to a method for preparing food-grade titanium dioxide. Background technique [0002] At present, there is no special production and preparation method for the existing food-grade titanium dioxide. It is to test the industrial grade titanium dioxide, and use some of the products whose ingredients meet the standards as food grade. The quality of the edible titanium dioxide obtained by this procedure is not guaranteed, and the yield is not high. Since it cannot be guaranteed that all products can be completely detected, it has certain potential safety hazards. Contents of the invention [0003] The object of the present invention is to provide a method for preparing food-grade titanium dioxide with good product quality, high yield and good impurity removal effect for the above-mentioned deficiencies in the prior art. [0004] The technical scheme that the present invention adopts is as follows: [0005] A preparation method of fo...

Claims

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Application Information

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IPC IPC(8): C01G23/053
Inventor 蒋静远
Owner JIANGSU HONGYUAN PHARMA
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