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Method for producing iron oxide yellow

A technology of iron oxide yellow and ferrous chloride, which is applied in the direction of iron oxide, iron oxide/iron hydroxide, etc., can solve the problem that the color consistency of iron oxide yellow is difficult to control, and achieve good color consistency, small Ca content, cost-saving effect

Active Publication Date: 2017-10-20
杭州金丰环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for producing iron oxide yellow, which solves the problem that the color consistency of iron oxide yellow prepared by the existing production method is difficult to control, and has the effect of simple preparation method and good color consistency

Method used

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  • Method for producing iron oxide yellow
  • Method for producing iron oxide yellow
  • Method for producing iron oxide yellow

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Experimental program
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Effect test

Embodiment 1

[0018] Embodiment 1: a kind of method of producing iron oxide yellow, comprises the steps:

[0019] S1: Add calcium carbonate and water into the reaction tank, the volume of the reaction tank is 50m 3 A stainless steel reactor, air is introduced from the bottom of the reactor and stirred continuously;

[0020] S2: Add ferrous chloride to the container, and the molar ratio of calcium carbonate and ferrous chloride is 1.04:1;

[0021] S3: Heat the system to 80°C, continuously blow in air during the process, and the air flow rate is 2500L / min; detect Fe in the system every 2h during the reaction process 2+ content, take 3 samples each time, and the time interval between each two samples is 5min; if Fe 2+ Content does not decline, then continue to react after supplementing calcium carbonate in the system, the mol ratio of the ferrous chloride that adds in the amount of calcium carbonate and step S2 is 0.01:1 at every turn; 2+ Content continues to decline, then continue to react...

Embodiment 2-17

[0025] Embodiment 2-17: a kind of method of producing iron oxide yellow, and the difference of embodiment 1 is, the addition molar ratio of calcium carbonate and ferrous chloride, the molar ratio of supplementing calcium carbonate and ferrous chloride, reaction time, The air flow rate and the concentration of dilute hydrochloric acid solution are different, see Table 1 for specific parameters.

Embodiment 18

[0026] Embodiment 18: a kind of method of producing iron oxide yellow, comprises the steps:

[0027] S1: Add calcium carbonate and water into the reaction tank, the volume of the reaction tank is 50m 3 A stainless steel reactor, air is introduced from the bottom of the reactor and stirred continuously;

[0028] S2: Add ferrous chloride to the container, and the molar ratio of calcium carbonate and ferrous chloride is 1.04:1;

[0029] S3: Heat the system to 85°C, continuously blow in air during the process, and the air flow rate is 3000L / min; detect Fe in the system every 2h during the reaction process 2+ content, take 3 samples each time, and the time interval between each two samples is 5min; if Fe 2+ Content does not decline, then continue to react after supplementing calcium carbonate in the system, the mol ratio of the ferrous chloride that adds in the amount of calcium carbonate and step S2 is 0.01:1 at every turn; 2+ Content continues to decline, then continue to reac...

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Abstract

The invention discloses a method for producing iron oxide yellow. The method comprises the following steps: S1: adding calcium carbonate and water into a container; introducing air, and stirring; S2: adding ferrous chloride into the container, wherein the adding ratio of the calcium carbonate to the ferrous chloride is equal to or greater than the stoichiometric ratio of the calcium carbonate to the ferrous chloride; S3: heating a solution to be 80 DEG C to 85 DEG C; continually blowing the air in a process until the solution reacts to a needed color; carrying out thermal insulation for 30min to 60min, and discharging; S4: adding a diluted hydrochloric acid solution after discharging, so as to remove the calcium carbonate; S5: rinsing, carrying out press filtering, drying, crushing, and packaging to obtain a finished product. The method disclosed by the invention has the effects that the preparation method is simple, and the color consistency is good.

Description

technical field [0001] The invention relates to the technical field of iron oxide yellow production, in particular to a method for producing iron oxide yellow. Background technique [0002] Iron oxide pigment is a kind of inorganic pigment with a wide range of uses. Among them, iron oxide yellow has a bright color, and the shade is between lemon yellow and orange, which has a high pigment quality. Iron oxide yellow is not only a high-quality pigment itself, but it will dehydrate and change color at 150-200°C, turning into iron oxide red, so iron oxide yellow can also be used as a raw material for iron oxide red. [0003] There are two most commonly used production methods, one is the air oxidation method, and the other is the liquid phase method. The production of iron oxide yellow by the air oxidation method is mainly divided into two steps. One, the preparation of iron oxide seed crystals, the reaction of ferrous sulfate and sodium hydroxide to produce ferrous hydroxide. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/06
CPCC01G49/06C01P2006/62C01P2006/63C01P2006/64C01P2006/80C01P2006/82
Inventor 周益钧
Owner 杭州金丰环保科技有限公司
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