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Process for preparing poly ferric chloride

A technology of polymerized ferric chloride and polymerized ferric sulfate, which can be used in the fields of ferric halide, chemical recovery, flocculation/sedimentation water/sewage treatment, etc., and can solve the problems of good water purification effect and so on.

Inactive Publication Date: 2009-06-24
金月祥
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are only preparation methods for water treatment agents such as ferric chloride, polyaluminum chloride, and polyferric sulfate. There is no preparation method for water treatment agents such as polyferric chloride, but after research, it is found that its treatment effect is better than that of trichloride. Ferric chloride, ferric chloride is a simple inorganic substance, and polyferric chloride is a high molecular inorganic substance, which has a good purification effect on water quality

Method used

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  • Process for preparing poly ferric chloride
  • Process for preparing poly ferric chloride
  • Process for preparing poly ferric chloride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] figure 1 It is a structural diagram of the reactor device in the preparation method of the present invention. Such as figure 1 As shown, the reactor device of the present invention includes a reactor body 1, a pipeline hydraulic injector 2, a circulating pump 3 and connecting pipelines thereof.

[0091] The pipeline hydraulic injection port 4 is connected with the top opening 5 of the oxidation reactor body 1; the circulation pump 3 connects the bottom outlet of the oxidation reactor body 1 with the pipeline hydraulic injector inlet 6 through a pipeline to form a closed circulation system; the pipeline hydraulic The side opening 7 of the injector is connected with the opening 8 on the top side of the oxidation reactor body through a pipeline. The restrictor valve 12 is a liquid flow control valve; after the reaction is complete, the reaction liquid is transferred to the sedimentation tank or filtering device through the outlet 13.

[0092] The catalyst is added throu...

Embodiment 2

[0094] The waste hydrochloric acid liquid is added to the acid-resistant reaction kettle, and iron scraps are added according to the conversion of the iron content of the raw materials (the percentage of total iron is 90%), so that the iron content in the product is 10% (w / w), and heat generation occurs with hydrochloric acid The heat generated by the reaction is preheated, and the catalyst NaNO is added at the same time 3 . Then use the circulating pump and the pipeline hydraulic injector to circulate for 3 hours, fully mix the feed liquid and the total amount of 1920L oxygen for contact reaction, and then enter the sedimentation tank, and the product obtained through natural precipitation and separation is polyferric chloride.

Embodiment 3

[0096] Add the waste hydrochloric acid pickling solution with an iron content (referring to the percentage of total iron) of 7.0% (w / v) into the acid-resistant reaction kettle, and then add the iron content (referring to the percentage of total iron 90%) to each ton of waste liquid The iron powder is about 48.9kg, the acid and iron react, the heat generated is preheated, and the catalyst NaNO is added at the same time 3 And feed 1920L of oxygen, use the circulating pump and pipeline hydraulic injector to circulate for 4 hours, fully mix the feed liquid and oxygen for contact reaction, enter the intermediate pool, and then filter and separate the obtained filtrate through the plate and frame filter press, which is the iron content ( Refers to the polyferric chloride product containing 10% total iron.

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Abstract

The invention relates to a method for preparing polyferric chloride. The method comprises: placing a pickling solution containing iron or hydrochloric acid pickle into a reaction kettle device and adding iron powder or iron slag into the reaction kettle device at the same time to heat materials with the heat generated in the exothermic reaction of the acid and the iron; and then adding a catalyst in and passing oxygen through the reaction kettle and then starting a circulating pump to circulating the reaction liquid for 3 to 5 hours till the polymerization finishes completely; and transferring the reaction liquid to a precipitation tank for precipitation or separation and enrich of products by filtering. The method for producing polyferric chloride by using the pickling solution and the hydrochloric acid pickle reduces production cost and realizes resource comprehensive use of waste.

Description

technical field [0001] The invention relates to a preparation method of a water treatment agent, in particular to a preparation method of polyferric chloride. Background technique [0002] In the process of industrial production, enterprises discharge a large amount of liquid waste and solid waste every day. These wastes are directly discharged, which not only pollutes the environment, but also wastes a lot of resources. For this reason, how to carry out selective comprehensive recycling of these wastes and realize "turning waste into treasure" is increasingly attracting the attention of the whole society. [0003] At present, there are only preparation methods for water treatment agents such as ferric chloride, polyaluminum chloride, and polyferric sulfate. There is no preparation method for water treatment agents such as polyferric chloride, but after research, it is found that its treatment effect is better than that of trichloride. Ferric chloride, ferric chloride is a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/10C02F1/52
CPCY02P20/584
Inventor 金月祥
Owner 金月祥
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