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Method for preparing iron oxide red pigment by utilizing titanium white waste acid

A technology of titanium dioxide waste acid and iron oxide red, which is applied in the field of pigment powder, can solve the problems of insufficient raw material sources, complicated production process, and high cost, and achieve the effects of waste utilization, simple and easy-to-operate process, and low cost

Active Publication Date: 2017-10-20
YIWU WADOU PICTURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main technical problem to be solved by the present invention is to provide a method for preparing iron oxide red pigment by using titanium white waste acid, aiming at the defects of insufficient source of raw materials, high cost and complex production process in the current traditional method for preparing iron oxide red pigment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0026] Collect the waste titanium dioxide acid and put it into the reactor, add ammonia water with a mass fraction of 28% dropwise into the reactor, adjust the pH of the waste titanium dioxide acid to 4.5, heat up to 60°C, stir and hydrolyze for 5 hours, filter and separate to remove the filter residue, and obtain the filtrate The filtrate is added to the reactor with an aeration device at the bottom, and the speed of starting the aeration device 50mL / min is exposed to chlorine in the reactor, and then the mass fraction of 10% of the filtrate mass is added to the reactor to be 30% hydrogen peroxide , stirred and reacted for 2 hours at a speed of 300r / min to obtain a pretreatment filtrate; weigh kiwi fruit and put it into a pulverizer to pulverize to obtain a pulverized product, mix the pulverized product and pectinase at a mass ratio of 10:1, and then put it into an enzymatic hydrolysis tank , seal the mouth of the tank and put it in a constant temperature box with a temperatur...

example 2

[0028]Collect the waste titanium dioxide acid and put it into the reactor, add ammonia water with a mass fraction of 28% dropwise into the reactor, adjust the pH of the waste titanium dioxide acid to 4.3, heat up to 50°C, stir and hydrolyze for 3 hours, filter and separate to remove the filter residue, and obtain the filtrate The filtrate is added to the reactor with an aeration device at the bottom, and the speed of starting the aeration device 50mL / min is exposed to chlorine in the reactor, and then the mass fraction of 10% of the filtrate mass is added to the reactor to be 30% hydrogen peroxide , stirred and reacted at 200r / min for 1h to obtain the pretreatment filtrate; weighed the lemon and put it into a pulverizer to pulverize it to obtain a pulverized product, mixed the pulverized product and pectinase at a mass ratio of 10:1 and put it into an enzymolysis tank , seal the mouth of the tank and put it in a constant temperature box with a temperature of 45°C, insulate the ...

example 3

[0030] Collect the waste titanium dioxide acid and put it into the reaction kettle, add ammonia water with a mass fraction of 28% dropwise into the reaction kettle, adjust the pH of the waste titanium dioxide acid to 4.4, heat up to 55°C, stir and hydrolyze for 4 hours, filter and separate to remove the filter residue, and obtain the filtrate The filtrate is added to the reactor with an aeration device at the bottom, and the speed of starting the aeration device 50mL / min is exposed to chlorine in the reactor, and then the mass fraction of 10% of the filtrate mass is added to the reactor to be 30% hydrogen peroxide , stirred and reacted at 250r / min for 2 hours to obtain the pretreatment filtrate; weighed the apples and put them into a pulverizer to pulverize to obtain pulverized products, mixed the pulverized products and pectinase at a mass ratio of 10:1 and put them into an enzymolysis tank , seal the mouth of the tank and put it in a constant temperature box with a temperatur...

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Abstract

The invention relates to a method for preparing iron oxide red pigment by utilizing titanium white waste acid, which belongs to the technical field of pigment powder. The method comprises the following steps: firstly locally neutralizing waste acid by utilizing ammonium, adjusting the pH of the waste acid, hydrolyzing and precipitating metal impurities such as titanium, aluminum vanadium and chromium in the waste acid in a sulfate form, allowing ferrous to remain in a liquid phase, oxidizing the ferrous into ferric iron by virtue of the combined effect of the chlorine gas and hydrogen peroxide with high reduction performance, obtaining a pretreatment solution, then performing enzymolysis on an acid-containing fruit, mixing an enzymatic solution rich in organic carboxylic acid and the pretreatment solution, extracting a chelated-state ferric iron by virtue of an extracting agent, mixing microorganisms and an extraction phase, fermenting, degrading organic carboxylic acid by utilizing microorganisms, enabling the ferric iron to be exposed again, then precipitating the ferric iron by utilizing the sodium hydroxide, obtaining ferric hydroxide precipitates, and sintering at a high temperature, thus obtaining the iron oxide red pigments. According to the method, the waste acid is used as a raw material, so that the source is sufficient, the cost is low, the entire process flow is simple and easy in operation, and the application prospect is wide.

Description

technical field [0001] The invention relates to a method for preparing iron oxide red pigment by utilizing titanium white waste acid, and belongs to the technical field of pigment powder. Background technique [0002] The industrial production methods of titanium dioxide mainly include chloride method and sulfuric acid method. The sulfuric acid method has mature technology, strong adaptability to titanium raw materials, low production cost, and mature technology. It can produce both anatase-type products and rutile-type products. It is a method commonly used in the existing titanium dioxide production methods . However, every 1 ton of titanium dioxide produced by the sulfuric acid process needs to consume more than 4 tons of sulfuric acid, and at the same time produce 6 to 8 tons of waste acid with a mass fraction of 20 to 25%. In addition to the main component H in the waste acid 2 SO 4 In addition, it also contains a certain amount of FeSO 4 、TiO 2 、A1 2 (SO 4 ) 3...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/06
CPCC01G49/06
Inventor 管小梅薛焱璟林茂兰
Owner YIWU WADOU PICTURE
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