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A kind of technology for preparing iron oxide yellow

An iron oxide yellow, process technology, applied in the directions of iron oxide, iron oxide/iron hydroxide, etc., can solve the problems of insufficient reaction and long time required for full reaction, so as to reduce heat loss, reduce energy consumption, and make it difficult to overflow effect

Active Publication Date: 2021-03-30
杭州金丰环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the liquid phase method also has defects: during the reaction process, all reactions are carried out in the oxidation tank, which is likely to cause insufficient reaction, and finally lead to a long time for full reaction

Method used

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  • A kind of technology for preparing iron oxide yellow

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062]Example 1: A process for preparing iron oxide is carried out in a full sealing reaction kettle.

[0063]Such asfigure 1 The full sealing reaction kettle is provided with an inlet portion 11, a liquid tube 1, a circulating tube 2, an injector 3, a stirring device 4, a pressure sensor 13 for adding a seed crystal addition to a seed. The base addition of the base is added to the tube 9 for the addition of oxygen-added tube 10, and the liquid tube 1 is provided with the circulation pump 5 between the liquid tube 1 and the circulation pipe 2, and the circulating pump 6 is provided between the circulation tube 2 and the liquid pipe 3; A communication pipe 7 is provided between the jet pump 6 and the fully sealed reaction kettle; the liquid pipe 3 extends to the liquid level of the first filtrate, the seed is added to the tube 8, and the tube 9 is added to the tube 9, and the oxygen is added to the tube 10. Both are all disposed above the liquid level of the first filtrate.

[0064]The pre...

Embodiment 2

[0070]Example 2: A process for preparing iron oxide yellow, the difference in Example 1 is, step one, Fe2+The concentration of 5% of the total concentration of acid washing acid.

Embodiment 3

[0071]Example 3: A process for preparing iron oxide yellow, the difference from Example 1 is, step one, Fe2+The concentration of 3% of the total concentration of acid washing acid.

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Abstract

The invention discloses an iron oxide yellow preparing process. The process comprises the following steps: step 1, after pickling waste acid and an iron sheet are subjected to a sufficient reaction, primary filtration is performed, and a first filtrate is obtained; step 2, ferric oxide seed crystals are added; the first filtrate is circularly pumped into a totally closed reactor by an injection pump, oxygen is added to space beyond the first filtrate in the totally closed reactor, oxygen enters the injection pump through a communicating pipe in a pumping process of the injection pump, the first filtrate is heated to 80-90 DEG C, the temperature range is kept, a reaction is performed, and a first mixture with pH of 4.5-5.5 is obtained; step 3, alkali is added, a sufficient reaction is performed, pH is enabled to be in the range of 3-5, and a second mixture is obtained; step 4, an accelerator is added, a reaction is performed, and a third mixture is obtained; step 5, discharging is performed, and iron oxide yellow is obtained by filter pressing, drying and smashing. Iron oxide yellow meeting requirements can be obtained with the preparation process, and required reaction time can beshortened.

Description

Technical field[0001]The present invention relates to the field of iron oxide yellow production, and more particularly, it involves a process of preparing iron oxide yellow.Background technique[0002]Iron oxide is usually used as a pigment and a polishing agent, or it can also be used to manufacture recording tape and telecommunications equipment.[0003]The traditional method of preparing iron oxide includes an air oxidation method and a liquid phase method, in comparison, the operation of the liquid phase is more secure, and therefore, it is more common to prepare iron oxide in the liquid phase method.[0004]Among them, the preparation steps of the liquid phase include:[0005]First, the preparation of the iron oxide seeds is made into hydroxide with sodium hydroxide.[0006]Second, the prepared iron oxide seed is pumped into the oxide barrel, and the air and ferrous salts are passed into the oxidum, and the temperature and pH of the reaction to the reaction of the reaction in the industr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/06
CPCC01G49/06C01P2006/62
Inventor 周益钧於东军曹玉富
Owner 杭州金丰环保科技有限公司