Iron oxide yellow and preparation method thereof, iron oxide red and preparation method of iron oxide red

A technology of iron oxide yellow and iron oxide red, applied in the direction of iron oxide/iron hydroxide, iron oxide, etc., can solve the problem that the production rate and quality of iron oxide red cannot be balanced.

Active Publication Date: 2019-09-13
正太新材料科技有限责任公司
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  • Abstract
  • Description
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Problems solved by technology

[0005] The invention provides a method for preparing iron oxide yellow, which can improve the problem that the production rate and quality of iron oxide red in the prior art cannot be balanced
[0007] Th

Method used

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  • Iron oxide yellow and preparation method thereof, iron oxide red and preparation method of iron oxide red
  • Iron oxide yellow and preparation method thereof, iron oxide red and preparation method of iron oxide red
  • Iron oxide yellow and preparation method thereof, iron oxide red and preparation method of iron oxide red

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preparation example Construction

[0023] A kind of preparation method of iron oxide yellow provided by the invention is specifically:

[0024] Firstly, the ferric salt solution and the alkaline precipitant used in the preparation process are prepared. The ferric salt solution is preferably a commonly used ferric chloride solution. Prepare two parts of ferric chloride solution in sufficient amount, the concentration of the first part of ferric chloride solution is 0.1-0.5 mol / L, and the concentration of the second part of ferric chloride solution is 1-2 mol / L. Prepare a sufficient amount of alkaline precipitant, divide the alkaline precipitant into the first alkaline precipitant and the second alkaline precipitant, the amount of the first alkaline precipitant is to completely precipitate the first ferric salt 1%-10% of the amount of the alkaline precipitating agent required by the solution, and the remaining alkaline precipitating agent is the second part of the alkaline precipitating agent. For avoiding that...

Embodiment 1

[0055] A kind of preparation method of iron oxide yellow that present embodiment provides, comprises:

[0056] 1000mL of 0.25mol / L FeCl 3 Solution, put 0.0075mol of the first part of ammonia water with a concentration of 5mol / L into the reactor, and raise the temperature to 90°C; add the second part of 5mol / L ammonia water into the reactor at a speed of 1mL / min, and stop adding ammonia water when the pH=1 ;Reduce the temperature of the reactor to 80°C and add 3.75×10 -4 mol of Na 2 HPO 4 , and then dropwise add FeCl with a concentration of 1mol / L to the reactor 3 solution, the rate of addition is 1mL / min, and the pH of the control reaction solution is within 1.4-1.6. The pH regulator used to control the reaction pH is ammonia water. The ammonia water used here is diluted with a volume ratio of 1:1. The mass concentration is 25% ammonia water; after reacting to the desired iron oxide yellow color, the iron oxide yellow provided by this embodiment is obtained. The preparati...

Embodiment 2

[0059] A kind of preparation method of iron oxide yellow that present embodiment provides, comprises:

[0060] 1000mL of 0.1mol / L FeCl 3 solution, 0.03mol concentration of 10mol / L of the first part of ammonia water was put into the reactor, and the temperature was raised to 85°C; the second part of 1 ammonia solution of concentration of 10mol / L was added into the reactor at a speed of 0.5mL / min, when the pH = Stop adding ammonia water at 1.5; lower the temperature of the reactor to 75°C and add 3×10 -4 mol of K 2 SiO 3 , and then dropwise add FeCl with a concentration of 2mol / L to the reactor 3 solution, the rate of addition is 1mL / min, and the pH of the control reaction solution is within 1.8-2. The pH regulator used to control the pH of the reaction is ammonia water. The ammonia water used here is diluted with a volume ratio of 1:1. The mass concentration is 28% ammonia water; after reacting to the desired iron oxide yellow color, the iron oxide yellow provided by this e...

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Abstract

The invention relates to the technical field of preparation of pigments, and provides a preparation method of iron oxide yellow. The preparation method of iron oxide yellow comprises the following steps: adding a first part of a ferric salt solution and a first part of an alkaline precipitant into a reaction container, and performing heating; continuously adding a second part of the alkaline precipitant into the reaction container, and stopping the addition of the second part of the alkaline precipitant when the pH value reaches 1-2 in order to prepare iron oxide yellow seeds; and preparing the iron oxide yellow from the yellow iron oxide seeds. The method has a high preparation efficiency. The iron oxide yellow is prepared by the preparation method. A preparation method of iron oxide redcomprises the following steps: preparing the iron oxide yellow through the preparation method of the iron oxide yellow; and calcining the iron oxide yellow. The preparation method of the iron oxide red has the advantages of high efficiency and low cost, and the obtained iron oxide red product has the advantages of approximate elliptic primary particle size, uniform particle size distribution and high tinting strength. The iron oxide red is prepared by the preparation method of the iron oxide red, and has a good quality.

Description

technical field [0001] The invention relates to the technical field of pigment preparation, in particular to iron oxide yellow and a preparation method thereof, and iron oxide red and a preparation method thereof. Background technique [0002] At present, iron oxide pigment is the second largest inorganic pigment next to titanium dioxide pigment, and also the largest color inorganic pigment. It has a wide color gamut, is cheap, non-toxic, weather-resistant and rust-resistant, and is widely used in building materials, coatings, inks, rubbers, etc. , plastics, ceramics, enamel, food and other industrial fields can be applied. The total annual production capacity of iron oxide pigments in the world is about 1 million tons. Iron oxide red is the largest and most complete variety of iron oxide pigments, accounting for about 70% of the total iron oxide pigments. There are many process routes for the production of iron oxide red. According to the state of the reaction raw materials...

Claims

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Application Information

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IPC IPC(8): C01G49/06
CPCC01G49/06C01P2004/03C01P2004/30C01P2004/62C01P2006/60C01P2006/80
Inventor 鲍领翔陈刘费明谢秉昆
Owner 正太新材料科技有限责任公司
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