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One-step production method for coagulant solid polymerized silica ferric sulfate

A technology of polysilicon ferric sulfate and a production method, which is applied in the fields of coagulant solid polysilicon ferric sulfate, environmental engineering, water supply and drainage engineering, and achieves the effects of good treatment effect, simplified production process and reduced operating cost.

Inactive Publication Date: 2007-11-07
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is no patent on the production method of solid polysilicon ferric sulfate in foreign countries

Method used

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  • One-step production method for coagulant solid polymerized silica ferric sulfate
  • One-step production method for coagulant solid polymerized silica ferric sulfate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1, under room temperature condition, add 42g ferrous sulfate monohydrate and 1g sodium silicate solid respectively in polytetrachlorethylene container, mix uniformly, then add the mixed solution of 30g nitric acid and 6g sulfuric acid. React for 25 hours, and the reaction temperature is 20-50°C. After the reaction is complete, take it out and pulverize it, and let it stand for 35 hours to obtain a solid polysilicate iron coagulant product. This product index is as follows: total iron: 21.5%: basicity: 14.3%; Silicon oxide: 0.8%; 2+ Total): 0.03%; insoluble matter is less than 1%, and the particle size is 1-500 microns.

Embodiment 2

[0016] Embodiment 2, at room temperature, add 42g ferrous sulfate monohydrate and 2g sodium silicate solid respectively in polytetrachlorethylene container, mix uniformly, then add the mixed solution of 22g nitric acid and 9g sulfuric acid. The reaction time is 36 hours, and the reaction temperature is 15-45°C. After the reaction is complete, take it out and pulverize it, and let it stand for 27 hours. After that, the solid polysilicate iron coagulant product is obtained. This product index is as follows: total iron: 19-22%: salinity degree: 15.1%; Silicon oxide: 1.5%; 2+ Total): 0.04%; insoluble matter is less than 1%, and the particle size is 1-500 microns.

Embodiment 3

[0017] Embodiment 3, under room temperature condition, add 42g ferrous sulfate monohydrate and 8g sodium silicate solid respectively in polytetrachlorethylene container, mix uniformly, then add the mixed solution of 23g nitric acid and 10g sulfuric acid. The reaction time is 48 hours, and the reaction temperature is 25-61°C. After the reaction is complete, take it out and pulverize it. After standing for 38 hours, the solid polysilicate iron coagulant product can be obtained. This product index is as follows: total iron: 22.0%: salinity: 25.5%; Silicon oxide: 3.2%; 2+ Total): 0.06%; insoluble matter is less than 1%, and the particle size is 1-500 microns.

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Abstract

The present invention belongs to the field of chemical technology, and is especially the one-step production process of polyiron sulfate-silicate as solid coagulant in environment engineering and water supply engineering. The one-step production process includes mixing solid material ferrous sulfate monohydrate, sodium silicate, nitric acid and sulfuric acid via stirring to complete oxidation and polymerization to obtain polyiron sulfate-silicate product. The preparation process of the present invention is simple, low in cost and high in treating effect, and has wide development value and application foreground.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a one-step production method of coagulant solid polysilicon ferric sulfate, which is mainly used in environmental engineering, water supply and drainage engineering. technical background [0002] Coagulant is a chemical agent that can be used to effectively separate fine suspended particles that cause water pollution. Fine particles that are not easily separated from water can be separated from water by coagulating them into flocs that are easy to separate. Today chemical treatment is a very important unit in water and wastewater treatment. Coagulants can be roughly divided into inorganic coagulants and organic coagulants. The main varieties of coagulants are still iron salts and aluminum salts. my country began to develop inorganic polymer coagulant polyferric sulfate in the early 1980s. Over the past 20 years, the production technology and application of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52
Inventor 李风亭张冰如周琪王铮
Owner TONGJI UNIV
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