Preparation method of ferric chloride hexahydrate

A technology of ferric chloride hexahydrate and reaction system, which is applied in the direction of ferric halide, etc., can solve the problems of difficult access, moisture ingress, and easy puncture of packaging bags, so as to achieve difficult adhesion, ensure sealing effect, and small mutual contact surface Effect

Inactive Publication Date: 2014-08-27
白晓光
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the FeCl prepared by the above-mentioned traditional process method 3 .6H 2 O, its chemical purity is not good and its impurity content is high
In addition, made of irregular bulk FeCl 3 .6H 2 O, the edges and corners are too sharp, it is easy to pierce the packaging bag, enter the moisture, and cause FeCl 3 .6H 2 O is hydrolyzed and agglomerated, not easy to take

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Use anhydrous iron trichloride (FeCl 3 ) Preparation of sand-like iron trichloride hexahydrate (FeCl 3 .6H 2 O)

[0037] Add 700 liters of pure water, 15 liters of hydrochloric acid, and anhydrous iron trichloride FeCl to 1000 liters of enamel glass jacketed reaction vessel 3 800kg, stir to dissolve and filter with a centrifuge (canvas or 747 polypropylene filter cloth); then vacuum filter (747 polypropylene filter cloth) to measure FeCl 3 content.

[0038] According to the ambient temperature, determine the batching coefficient θ. The applicant has verified through a large number of experiments that the mixing coefficient θ corresponding to the ambient temperature of 20°C, 15°C, 10°C, and 5°C is 0.9, 1.0, 1.1, and 1.2.

[0039] According to the determined batching coefficient θ, calculate the amount of pure water added to ensure that the θ value is adjusted to between 0.9-1.20, and cool under stirring to allow FeCl to precipitate 3 .6H 2 O sand crystals.

[0040] Finally, the ...

Embodiment 2

[0042] Preparation of Hemispherical FeCl3.6H2O from Anhydrous FeCl3

[0043] In a 1000 liters glass-lined jacketed reaction vessel, add 500 liters of pure water, 15 liters of hydrochloric acid, and anhydrous FeCl 3 FeCl measured after 800kg stirring and dissolving 2 Content, then press FeCl 2 Add NaClO in mols 3 (Sodium chlorate), per 1 mole of FeCl 2 Add a total of 17.67 grams of NaClO 3 . Application K 3 Fe(CN) 6 Test for Fe-free +2 When, filter.

[0044] Put the filtrate into a 20-liter plastic bucket, 20kg per bucket. Use SnCl 2 –K 2 Cr 2 O 7 Method to measure FeCl 3 The percentage of A, and then add water to adjust

[0045] θ=(1-A+x) / A=2 / 3

[0046] Calculate the mass percentage of water that should be added, and then multiply it by 20kg, that is, the amount of water that should be added. After adding water, stir evenly and let it stand overnight (below 20℃) for more than 8 hours. When agitating to start to precipitate crystals, pour it into a hemispherical mold as soon as possi...

Embodiment 3

[0049] You can also use commercially available sandy iron trichloride hexahydrate FeCl 3 .6H 2 O was purified according to Example 1 or Example 2 above to produce sandy FeCl 3 .6H 2 O or hemispherical FeCl 3 .6H 2 O, FeCl should be taken into consideration when calculating with theta value 3 .6H 2 O raw material has 40% water (or a little more), FeCl 3 Only accounted for 60% (or a little less).

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Abstract

The invention discloses a preparation method of ferric chloride hexahydrate. The method is characterized by comprising the following steps: firstly, determining that a reaction system for preparing ferric chloride hexahydrate contains H2O and FeCl3; secondly, setting the dosing coefficient theta (theta=M_H2O/M_FeCl3) of the reaction system for preparing ferric chloride hexahydrate, wherein M_H2O represents the mass number of H2O in the reaction system and the M_FeCl3 represents the mass number of FeCl3 in the reaction system; finally, adjusting the mass numbers of H2O and FeCl3 in the reaction system according to the dosing coefficient theta (theta=2/3), uniformly stirring at 20 DEG C, standing for 8 hours, pouring into a mould when stirring until solids are separated out, and curing for forming to obtain blocky ferric chloride hexahydrate; or, adjusting the mass numbers of H2O and FeCl3 in the reaction system according to the dosing coefficient theta (theta=0.89-1.2), and stirring for cooling to obtain sand-shaped ferric chloride hexahydrate.

Description

Technical field [0001] The invention relates to a preparation method of ferric chloride hexahydrate. Background technique [0002] Molecular formula of ferric chloride hexahydrate: FeCl 3 .6H 2 O English name: Ferric chloride hexahydrate, appearance: brown-yellow crystals. Performance: odorless, astringent, strong hygroscopicity and deliquescence. It can be deliquescence into red-brown liquid in the air. Easily soluble in water, the aqueous solution is strongly acidic and can coagulate protein. Easily soluble in ethanol and acetone, but also soluble in liquid sulfur dioxide, ethylamine, aniline, and insoluble in glycerin and phosphorus trichloride. Uses: Mainly used as water treatment agent, etching agent for printing plate making, electronic circuit diagram board, chlorinating agent in metallurgical industry, oxidizing agent and mordant in dye industry, catalyst and oxidizing agent in organic synthesis industry, chlorinating agent, and manufacturing other iron Raw materials fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/10
Inventor 白晓光白燕春白联芳
Owner 白晓光
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