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Device and method for preparing ferric oxide yellow

A technology of iron oxide yellow and sampling device, which is applied in the field of inorganic pigment production, can solve the problems of high price of alkaline neutralizer, increased production cost of iron oxide yellow, and increased cost of waste liquid treatment

Active Publication Date: 2014-02-19
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the prior art can prepare yellow iron oxide products with better quality, the price of alkaline neutralizer used in the preparation process is higher, which increases the production cost of yellow iron oxide
At the same time, it can be seen from the reaction equation of the above-mentioned oxidation stage that the process of preparing iron oxide yellow by air oxidation will produce a large amount of waste liquid of inorganic salts, such as Na 2 SO 4 Solution, the generation of waste liquid not only increases the cost of waste liquid treatment, but also puts a huge pressure on the environment

Method used

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  • Device and method for preparing ferric oxide yellow
  • Device and method for preparing ferric oxide yellow
  • Device and method for preparing ferric oxide yellow

Examples

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preparation example Construction

[0070] The device for preparing iron oxide yellow provided by the present invention can use the bipolar membrane electrodialysis device to process the inorganic salt waste liquid produced in the process of preparing iron oxide yellow, use the inorganic salt waste liquid to prepare lye, and use the obtained lye as alkali Neutralizing agent to adjust the pH value of the reaction solution in the process of preparing yellow iron oxide. The present invention does not need to use expensive alkaline neutralizing agent to prepare yellow iron oxide, thereby effectively reducing the cost of producing yellow iron oxide. The invention also effectively treats the inorganic salt waste liquid produced in the process of preparing iron oxide yellow, and realizes the recovery and reuse of resources.

[0071] see figure 1 , figure 1 The structural schematic diagram of the device for preparing iron oxide yellow provided by the embodiment of the present invention, wherein, 1 is a bipolar membrane...

Embodiment 1

[0166] use figure 1 The shown device for preparing iron oxide yellow prepares iron oxide yellow, comprising the following steps:

[0167] Add 2.4L of citrine seeds and 5.6L of pure water into the reaction vessel 3, the total volume of the citrine seeds and pure water accounts for 80% of the volume of the reaction vessel 3.

[0168] The sensitive parts of the pH meter 10 and the temperature sensor 6 are placed below the liquid level of the reaction solution in the reaction vessel 3 .

[0169] Fill 1L saturated ferrous sulfate aqueous solution in feed liquid tank 11, the volume of saturated ferrous sulfate aqueous solution accounts for 90% of feed liquid tank 11 volumes, in the process of preparing iron oxide yellow, ensure that there is enough saturated sulfuric acid in feed liquid tank 11 Aqueous ferrous solution.

[0170] In the anode chamber tank 34 and the cathode chamber tank 35, perfusion 1L molar concentration is the sodium sulfate solution of 0.3mol / L respectively; T...

Embodiment 2

[0189] Iron oxide yellow was prepared by the method in Example 1.

[0190] Test the mass concentration of ferrous sulfate, the pH value of the reaction solution and the molar concentration of lye in the process of preparing iron oxide yellow in Example 2 according to the method of Example 1, the test results are as follows Figure 2 ~ Figure 4 shown. figure 2 Middle curve 2 is the curve that the mass concentration of ferrous sulfate varies with time in the reaction solution that embodiment 2 obtains; image 3 Middle curve 2 is the curve that the pH value of the reaction solution that embodiment 2 obtains changes with time; Figure 4 Middle curve 2 is the curve that the molar concentration of the lye that embodiment 2 obtains changes with time. The test results show that the method for preparing yellow iron oxide provided in Example 2 of the present invention can make the concentration of ferrous sulfate, the pH value of the reaction solution and the concentration of lye mee...

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Abstract

The invention provides a device and a method for preparing ferric oxide yellow. The device comprises 1, a first sample introduction device, 2, a second sample introduction device, 3, a gas inlet device, 4, a reactor of which an inlet is connected to an outlet of the first sample introduction device, an outlet of the second sample introduction device and an outlet of the gas inlet device, 5, a heating device which is used for heating the reactor, 6, a pH adjustment device which is used for adjusting a pH value of the reaction solution in the reactor, and 6, a bipolar-membrane electrodialysis device of which an alkaline chamber outlet is connected to an inlet of the second sample introduction device. The device for preparing the ferric oxide yellow utilizes alkaline liquor produced by the bipolar-membrane electrodialysis device as an antalkali, and adjusts a pH value of the reaction solution in ferric oxide yellow preparation. The method does not utilize an antalkali having a high price to prepare the ferric oxide yellow so that a ferric oxide yellow production cost is reduced. The device and the method realize effective treatment on an inorganic salt waste liquid produced by ferric oxide yellow preparation and realize resource recovery and utilization.

Description

technical field [0001] The invention relates to the technical field of inorganic pigment production, in particular to a device and method for preparing iron oxide yellow. Background technique [0002] The main component of iron oxide yellow is ferric oxide, which is mainly used as a pigment. Because of its advantages of non-toxicity, wear resistance, low price, strong tinting power and high hiding power, it can be used as a paint for rubber, plastic, paint, ink, terrazzo Colorants for floors, paving bricks, and wall finishes. In addition, they can also be used as raw materials for the production of iron red, iron black, magnetic iron oxide, and industrial catalysts. [0003] The methods for preparing iron oxide yellow include Penneman-Zoff method, air oxidation method and nitric oxide (NO) catalytic method, etc. Among these methods for preparing iron oxide yellow, the more commonly used method is Penneman-Zoff method. method and air oxidation method. [0004] The Penneman-...

Claims

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Application Information

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IPC IPC(8): C01G49/06
Inventor 徐铜文张旭王晓林汪耀明李传润
Owner UNIV OF SCI & TECH OF CHINA
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