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Method for neutralizing titanium dioxide waste acid/wastewater by using yellow phosphorus slag

A technology of titanium dioxide waste acid and yellow phosphorus slag, which is applied in the chemical industry, can solve the problems of massive treatment of titanium dioxide waste acid wastewater and low cost, and achieve significant social benefits, low cost, and good promotion prospects

Inactive Publication Date: 2013-10-09
南通励佳机械配件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] What the present invention aims to solve is the technical problem in the prior art that the titanium white waste acid wastewater cannot be processed in large quantities at low cost

Method used

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  • Method for neutralizing titanium dioxide waste acid/wastewater by using yellow phosphorus slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment one processes titanium white waste acid waste water with the inventive method

[0026] As shown in Table 1, mix 100g of titanium dioxide waste acid with 603g of titanium dioxide waste water, and measure the mass percent concentration of sulfuric acid in the compound to be 5%, then add 45.3g of yellow phosphorus slag according to the reaction amount, and stir for 80 minutes. Finally, add 40 g of high-calcium slag and stir evenly, and the measured pH is 8 at this time. After standing still for 10 minutes, the precipitation is complete, and the supernatant is recycled or discharged directly, and the sediment is collected and thrown to the slag yard.

Embodiment 2

[0027] Embodiment two processes titanium white waste acid waste water with the inventive method

[0028] As shown in Table 1, mix 100g of titanium dioxide waste acid with 412g of titanium dioxide waste water, and measure the concentration of sulfuric acid in the compound to be 6%, then add 39.6g of yellow phosphorus slag according to the reaction amount, and stir for 60 minutes. Finally, add 31 g of high-calcium slag and stir evenly, and the measured pH is 7.9 at this time. After standing still for 10 minutes, the precipitation is complete, and the supernatant is recycled or discharged directly, and the sediment is collected and thrown to the slag yard.

Embodiment 3

[0029] Embodiment three uses the inventive method to process titanium white waste acid waste water

[0030] As shown in Table 1, mix 100g of titanium dioxide waste acid with 232g of titanium dioxide waste water, and measure the mass percent concentration of sulfuric acid in the compound to be 8%, then add 34g of yellow phosphorus slag according to the reaction amount, and stir and react for 50 minutes , Add 30 g of high calcium slag and stir evenly, and the measured pH is 8 at this time. After standing still for 10 minutes, the precipitation is complete, and the supernatant is recycled or discharged directly, and the sediment is collected and thrown to the slag yard.

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Abstract

The invention discloses a method for neutralizing titanium dioxide waste acid / wastewater by using yellow phosphorus slag, belongs to the field of chemical industry, and aims to solve the technical problem that a large amount of titanium dioxide waste acid / wastewater cannot be treated at low cost. The method for neutralizing the titanium dioxide waste acid / wastewater by using the yellow phosphorus slag comprises the following steps of: adding the yellow phosphorus slag into the titanium dioxide waste acid and / or wastewater according to reacting dose, stirring, and adding high-calcium slag or calcium oxide to regulate pH to 6 to 9. In the method, raw materials are industrial wastes which pollute an environment, and a product is waste slag which can be directly transported to a slag yard and cannot pollute the environment; and the method is low in cost, obvious in social benefit and good in popularization prospect.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a method for neutralizing and treating titanium white waste acid wastewater by using yellow phosphorus slag. Background technique [0002] At present, as our country mainly adopts the sulfuric acid method to produce titanium dioxide, and every ton of titanium dioxide produced will produce about 6 tons of waste acid with a mass percentage concentration of about 20% and about 60-80 tons of waste water with a mass percentage of about 2%. The waste acid produced by the production of titanium dioxide by the sulfuric acid method is called titanium dioxide waste acid. The main material composition of titanium dioxide waste acid is: 18-25% sulfuric acid, about 5% iron, a small amount of magnesium, aluminum, manganese, partial titanium acid and precious metals such as vanadium, scandium and gallium; the wastewater produced by sulfuric acid production of titanium dioxide is cal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/66
Inventor 汤铁彭凌波
Owner 南通励佳机械配件有限公司