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Preparation of polymeric ferric sulfate

A technology for polymerizing ferric sulfate and ferrous sulfate, which is applied in the fields of ferric sulfate, sustainable manufacturing/processing, chemical industry, etc., to reduce production costs, shorten reaction time, and solve time-consuming and laborious effects.

Active Publication Date: 2009-05-20
嘉兴市环科环保新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Another object of the present invention is to provide an oxidation reactor device for preparing polyferric sulfate. This device mainly solves the problem of using stirring in the existing production technology through the mutual cooperation between the circulating pump, the pipeline injector and the oxidation reactor body. The energy consumption caused by the device and the way of steaming can achieve the purpose of energy saving, environmental protection and cost reduction

Method used

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  • Preparation of polymeric ferric sulfate
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Embodiment 1

[0030] The pickling waste water containing 2.5% (w / w) iron is added to the dissolution tank, and then 50kg of concentrated sulfuric acid (98%) and 458kg of ferrous sulfate (15.6%) are added to each ton of waste liquid. When the ferrous sulfate is basically dissolved, it is transferred to the figure 1 In the shown oxidation reactor device body 1, add 4.5kg NaNO through the catalyst inlet 9 2 1680L of oxygen is introduced from the oxygen inlet 10, and then the circulation pump 3 of the oxidation reactor device is turned on. The liquid in the circulation pump passes through the injection of the pipeline injector 2 and the negative pressure to fully mix the gas and liquid. After 3 hours of polymerization reaction Polyferric sulfate (about 9% total iron content) is obtained.

Embodiment 2

[0032] Add the waste sulfuric acid pickling solution containing 7.5% (w / w) of iron (total iron content) to the acid-resistant dissolution tank, and then add 70kg of concentrated sulfuric acid (98%) and 246kg of ferrous sulfate (15.6%) to each ton of waste liquid . When the ferrous sulfate is basically dissolved, it is transferred to the figure 1 In the oxidation reactor body 1 shown in the oxidation reactor device, add 4.5kg NaNO from the catalyst inlet 9 2 1680L of oxygen is introduced from the oxygen inlet 10, and then the circulation pump 3 of the oxidation reactor device is turned on. The liquid in the circulation pump passes through the injection of the pipeline injector 2 and the negative pressure to fully mix the gas and liquid. After 3 hours of polymerization reaction Polyferric sulfate (11% total iron content) was obtained.

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Abstract

The invention discloses a method for preparing bodied ferric sulfate, which prepares the bodied ferric sulfate by taking ferrous waste acid as the raw material and using the heat generated by the exothermic reaction of sulphuric acid when being dissolved in water to dissolve ferrous sulphate so as to save production consumption. By means of the mutual matching of devices such as a recycle pump, a pipeline ejector, an oxidation reaction kettle and the like, the method solves the problem of energy consumption in the existing production technology, which is caused by using a stirring device and inletting steam and achieves the purposes of saving energy, protecting environment and lowering expense.

Description

technical field [0001] The invention relates to a method for preparing polyferric sulfate, in particular to a method for preparing polyferric sulfate by using iron-containing waste acid as a raw material. 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] The preparation method of existing polyferric sulfate generally is to use ferrous sulfate as raw material, oxidizes with oxidizing agent in sulfuric acid solution, first ferrous sulfate is oxidized to ferric sulfate, when the amount of sulfate in the solution is properly controlled, ferric sulfate can be Continue to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/14C02F1/52
CPCY02P20/10
Inventor 金月祥
Owner 嘉兴市环科环保新材料科技有限公司
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