Process and device for preparing ferric chloride

A technology of ferric chloride and process, which is applied in the field of waste liquid treatment, can solve the problems of high cost and high risk, and achieve the effects of reducing reaction cost, simple equipment and saving reaction cost

Pending Publication Date: 2019-04-23
唐山达润达危废处理有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The present invention proposes a process and device for preparing ferric chloride, which solves the problem of high risk and high cost of using high temperature and high pressure oxidation pickling waste liquid in the preparation of ferric chloride in the prior art

Method used

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  • Process and device for preparing ferric chloride
  • Process and device for preparing ferric chloride
  • Process and device for preparing ferric chloride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Such as Figure 1~2 As shown, a kind of device that the present invention proposes to prepare ferric chloride comprises reaction tank, and reaction tank comprises reaction tank body 1, stirring mechanism 2, air inlet 3, air outlet 4, catalyst inlet 5, air inlet 3 and the gas outlet 4 are all arranged on the top of the reaction tank body 1, and the stirring mechanism 2 extends into the reaction tank body 1,

[0047] Stirring mechanism 2 comprises transmission shaft 21, hollow shaft sleeve 22 and impeller 24, and hollow shaft sleeve 22 is sleeved on the transmission shaft 21, and impeller 24 is arranged below hollow shaft sleeve 22, and air inlet 3 is connected with air intake duct, and air intake The pipeline is connected with the impeller 24,

[0048] The impeller 24 includes a moving impeller 241 and a stationary impeller 242 , the moving impeller 241 is arranged in the stationary impeller 242 , and the moving impeller 241 is arranged on the transmission shaft 21 .

...

Embodiment 2

[0059] Adopt the device of embodiment 1 to prepare the method for ferric chloride, may further comprise the steps:

[0060] S1, take 2750mL pickling waste liquid and add 330mL concentrated hydrochloric acid to obtain a mixed solution with a total mass of 3990g, wherein the concentration of ferrous chloride in the pickling waste liquid is 2.62mol / L, and the concentration of hydrogen chloride is 1.17mol / L , the concentration of hydrogen chloride in concentrated hydrochloric acid is 12mol / L;

[0061] S2, add 20g NH to the mixed solution obtained in step S1 4 After the Cl is transferred to the reaction tank body 1, the motor 26 is started, and the air is fed into the air inlet 3 and the temperature is raised to 60° C. at the same time;

[0062] S3. Oxygen is introduced from the air inlet 3, and NaNO is added dropwise through the catalyst inlet 5 2 , it is 1 drop / second with dropping funnel 9 control dropping rate;

[0063] S4. Sampling is taken from the sampling port 8 to detec...

Embodiment 3

[0065] Adopt the device of embodiment 1 to prepare the method for ferric chloride, may further comprise the steps:

[0066] S1, take 2750mL pickling waste liquid and add 330mL concentrated hydrochloric acid to obtain a mixed solution with a total mass of 3990g, wherein the concentration of ferrous chloride in the pickling waste liquid is 2.62mol / L, and the concentration of hydrogen chloride is 1.17mol / L , the concentration of hydrogen chloride in concentrated hydrochloric acid is 12mol / L;

[0067] S2, add 20g MnCl to the mixed solution obtained in step S1 2 Then turn it into the reaction tank body 1, start the motor 26, and feed the air through the air inlet 3 and heat up to 60°C at the same time;

[0068] S3. Oxygen is introduced from the air inlet 3, and NaNO is added dropwise through the catalyst inlet 5 2 , it is 1 drop / second with dropping funnel 9 control dropping rate;

[0069] S4. Sampling is taken from the sampling port 8 to detect the concentration of ferrous ions...

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Abstract

The invention belongs to the technical field of waste liquid treatment, and provides a device for preparing ferric chloride. The device comprises a reaction groove, wherein the reaction groove comprises a reaction groove body, a stirring mechanism, an air inlet, an air outlet and a catalyst inlet; the air inlet and the air outlet are both formed in the upper part of the reaction groove body; the stirring mechanism extends into the reaction groove body; the stirring mechanism comprises a transmission shaft, a hollow shaft sleeve and an impeller; the hollow shaft sleeve is sleeved on the transmission shaft; the impeller is arranged below the hollow shaft sleeve; an air inlet pipeline is connected to the air inlet; and the air inlet pipeline is connected with the impeller. The invention further provides a process for preparing ferric chloride by adopting the device for preparing ferric chloride. The process includes taking a pickling waste liquid as a raw material; adopting NH4Cl, NH4NO3,MnCl2 or HNO3 as cocatalysts, and cooperating with a main catalyst NaNO2 to jointly catalyze an oxidation reaction of ferrous chloride, hydrogen chloride and oxygen or air under normal pressure. Thedevice and the process solve the problems of high danger and high cost of adopting high-temperature high-pressure oxidation pickling waste liquid in the preparation of ferric chloride in the prior art.

Description

technical field [0001] The invention belongs to the technical field of waste liquid treatment, and relates to a process and a device for preparing ferric chloride. Background technique [0002] In the production process of the metal products industry, it is necessary to remove the iron oxide on the surface of the steel plate for pickling, and a large amount of pickling waste will be generated during the pickling process. Steel plate pickling waste liquid is a high-risk waste liquid that pollutes the environment. It also contains a large amount of FeCl 2 , to its recycling, turning waste into wealth, countries all over the world have carried out a lot of research. Use it to make FeCl 2 .4H 2 O crystals are sold, and it is used to prepare hydrated iron oxide (r-FeOOH), such as the patent (US4176172) of the American Fei Ze Company, which uses it to prepare Fe 3 o 4 Yes, use it to make r-Fe 2 o 3 , such as CN (1104182), and so on. [0003] Ferric chloride, whether liquid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/10
CPCC01G49/10
Inventor 王爱国白晓光徐锡刚
Owner 唐山达润达危废处理有限公司
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