Method for preparing blocky ferric trichloride

A technology of ferric trichloride and ferric chloride hexahydrate, which is applied in the direction of ferric halide, etc., can solve the problems of low product purity, short shelf life, and easy deliquescence

Active Publication Date: 2012-10-03
3R ENVIRONMENTAL TECH CO LTD
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Problems solved by technology

Because there are impurities mixed in the pickling waste liquid, the catalyst for oxygen oxidation brings impurities, and when the liquid ferric chloride is concentrated, cooled and crystallized, the impurities enter the solid product, and the purity of the product is low
[0006] And the traditional solid ferric chloride is mainly granular crystal, easy to deliquescence, and the shelf life is short, the shelf life is one year when the ambient temperature is below 25 °C, and the shelf life is only three months above 25 °C

Method used

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  • Method for preparing blocky ferric trichloride
  • Method for preparing blocky ferric trichloride
  • Method for preparing blocky ferric trichloride

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preparation example Construction

[0024] Such as figure 1 Shown, the preparation method of the bulk ferric chloride of an embodiment mainly comprises the following steps:

[0025] Step S110, providing or preparing solid ferrous chloride crystals, and adding 6-7 parts by weight of solid ferrous chloride crystals to one part by weight of water heated to 80-90°C to partially dissolve the solid ferrous chloride crystals , to obtain ferrous chloride aqueous solution.

[0026] In this embodiment, the ferrous chloride raw material in the ferrous chloride aqueous solution is solid ferrous chloride tetrahydrate crystal, which is mainly based on iron and steel pickling waste liquid as raw material, and is added to the iron and steel pickling waste liquid Elemental iron is obtained by filtering, evaporating and concentrating, cooling and crystallizing, and centrifuging. Iron and steel pickling waste liquid contains a lot of Fe 2+ , acid and some impurity metal ions (such as Na + 、K + , Mg 2+ 、Ni 2+ , Pb 4+ etc.),...

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Abstract

The invention relates to a method for preparing blocky ferric trichloride. Blocky ferric trichloride can be produced both under constant-temperature crystal growing condition at 5-10 DEG C and at high-temperature environment temperature by adjusting the parameters of crystal cooling and crystal growing. In addition, solid ferric trichloride is used as a raw material, and impurities in the traditional pickling waste liquid are prevented from being mixed into a product; and chlorine gas is used as an oxidizing agent and does not contain any impurity. Finally, the blocky ferric trichloride can be directly obtained through crystal growing, the area of blocky ferric trichloride in direct contact with the air is small, the problem that ferric trichloride absorbs moisture easily can be effectively solved, the quality guarantee period of the product is prolonged, and the blocky ferric trichloride is easy to store and transport.

Description

technical field [0001] The invention relates to a preparation method of ferric chloride, in particular to a preparation method of block ferric chloride. Background technique [0002] Ferric chloride is mainly used as an industrial water treatment agent, an etchant for electronic circuit boards and stainless steel, a chlorinating agent in the metallurgical industry, an oxidizing agent and a mordant in the dye industry, a raw material for iron salts and pigments, and a catalyst, oxidizing agent and catalyst in the organic industry. Chlorinating agent. Ferric chloride products are available in both liquid and solid forms. Liquid ferric chloride is a reddish-brown liquid. Its solution is acidic and has strong oxidizing properties. It has a strong corrosive effect on ordinary metal containers and is not easy to store and transport. Solid ferric chloride is yellow-brown crystal or massive solid, with a melting point of 37°C and a boiling point of 280-285°C. It is easily soluble ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/10
Inventor 丁德才王权永肖晋宜龙国兵杨柳荫
Owner 3R ENVIRONMENTAL TECH CO LTD
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