Prepn process of liquid polymerized ferric sulfate by means of oxidizing catalyst

A technology for polymerizing ferric sulfate and oxidation catalyst, applied in physical/chemical process catalysts, ferric sulfate, chemical instruments and methods, etc., can solve the problems of increasing drying energy consumption, prolonging drying time, increasing production cost, etc., and saving electricity and energy consumption, speed up the reaction, reduce drying energy consumption

Inactive Publication Date: 2003-06-04
鲍文林
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] The traditional method of preparing polyferric sulfate (PFS) is to use steam heating, oxygen pressurized oxidation, and sodium nitrite to catalyze the reaction for 3-4 hours. This method has high cost, complicated process, and is easy to pollute the environment; The Chinese patent "Method for Preparing Solid Polymerized Ferric Sulfate with Oxidant" (Application No.: 00133694.0) provides a method for preparing PFS under normal pressure, that is, 1) add ferrous sulfate to water, and then add KOH to adjust the pH above 8 ; 2) adding the solution of the above 1 to the oxidizing agent H 2 o 2 or potassium chlorate stirring, the solution tempera

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Put ferrous sulfate, water, sulfuric acid, sodium chlorate and potassium permanganate into the reaction kettle one by one, stir thoroughly for 7-10 minutes, and it is ready. The ratio of the above raw materials is:

[0031] Ferrous sulfate 72%, sulfuric acid 6.0%, sodium chlorate 3.8%, potassium permanganate 1%, and the rest is water.

Embodiment 2

[0033] Put ferrous sulfate, water, sulfuric acid, sodium chlorate and potassium permanganate into the reaction kettle one by one, stir thoroughly for 7-10 minutes, and it is ready. The ratio of the above raw materials is:

[0034] 60% ferrous sulfate, 5.6% sulfuric acid, 3.0% sodium chlorate, 1% potassium permanganate, and the rest is water.

Embodiment 3

[0036] Put ferrous sulfate, water, sulfuric acid, sodium chlorate and potassium permanganate into the reaction kettle one by one, stir thoroughly for 7-10 minutes, and it is ready. The ratio of the above raw materials is:

[0037] Ferrous sulfate 75%, sulfuric acid 8.0%, sodium chlorate 3.8%, potassium permanganate 1%, and the rest is water.

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PUM

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Abstract

The present invention is the preparation process of liquid polymerized ferric sulfate by means of oxidizing catalyst. The process includes adding ferrous sulfate, water, sulfuric acid and sodium chlorate into reactor successively and stirring for 7-10 min. The present invention features the addition of powerful catalyst potassium permanganate, high concentration of the reactant components, fast reaction speed, high iron content and basicity of the product, low oxidant and water consumption, direct drying without washing, less drying time, low drying cost and high product quality.

Description

technical field [0001] The invention relates to a method for preparing polyferric sulfate for water treatment, in particular to a method for preparing liquid polyferric sulfate with an oxidation catalyst. Background technique [0002] Polyferric sulfate (PFS) is an inorganic polymer flocculant with superior performance. It introduces hydroxyl groups into the network structure of iron molecular clusters, and OH - Bridging to form multi-nuclear complex ions; PFS has excellent coagulation performance and the ability to remove BOD, COD and heavy metals in water, the floc sedimentation speed is fast, and can reduce the content of nitrous nitrogen; at present, PFS has been used as an excellent water purifying agent. Widely used in the field of water treatment technology. [0003] The traditional method of preparing polyferric sulfate (PFS) is to use steam heating, oxygen pressurized oxidation, and sodium nitrite to catalyze the reaction for 3-4 hours. This method has high cost, c...

Claims

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Application Information

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IPC IPC(8): B01J27/053B01J27/06C01G49/14
Inventor 鲍文林
Owner 鲍文林
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