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Process for preparing waste water purifying agent

A technology for wastewater treatment and water purifying agent, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc. It can solve the problems that papermaking wastewater tailings cannot be fully recycled and zero-discharged. The effect of improving the ring crush strength

Inactive Publication Date: 2006-06-14
罗斌华 +2
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  • Description
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  • Application Information

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Problems solved by technology

For the papermaking industry, its wastewater treatment is a difficult problem. The above-mentioned water purifiers all have the following common shortcomings: that is, the papermaking wastewater tailings in the papermaking industry wastewater treatment cannot be fully recycled and zero discharge can be achieved.

Method used

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  • Process for preparing waste water purifying agent
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Embodiment Construction

[0020] The raw material for the preparation of Type A water purifier of the present invention is the by-product ferrous aluminum salt produced by the sulfuric acid method in a chemical plant, and the ferrous aluminum salt is oxidized with sulfuric acid and hydrogen peroxide strong oxidant, and after 5-6 hours of hydrolysis reaction, a certain amount of ferrous aluminum salt is formed after polymerization. Polymerized iron with a high degree of alkalization, on this basis, add phosphate, react at a certain temperature for 30-60 minutes to form a liquid polymer, and after concentration and drying at 60-90°C, a gray-white solid product can be obtained.

[0021] In industrial production, the ferrous aluminum salt is often oxidized with air or oxygen under the action of a catalyst, and in the laboratory, a strong oxidant is often used for direct oxidation.

[0022] The following two reactions will occur when a strong oxidizing agent is added to the ferrous aluminum salt solution:

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Abstract

The invention relates to a method for preparing a water purifying agent for wastewater treatment, which is characterized in that the water purifying agent for wastewater treatment is prepared by combining two parts: the preparation of type A water purifying agent and the preparation of type B water purifying agent; wherein the type A water purifying agent The preparation method of the water agent is as follows: oxidize the ferrous aluminum salt with a strong oxidant, hydrolyze and polymerize it to generate polyferric iron with a certain degree of alkalization, add phosphate on this basis, and react to form a liquid polymer. Concentrate and dry to obtain off-white solid product. The preparation method of Type B water purifier is as follows: firstly, the polyamine compound and the cyclic ether undergo hydrogen displacement polymerization to generate an intermediate product substituted amine; this product is used as a prepolymer to further react with a chain extender of a multifunctional group, and the molecular weight With the increase of the reaction time, it gradually increases, the medium viscosity increases rapidly, and finally the product is obtained. In the application process, add type A first, then add type B, and then separate. The use of the above-mentioned water purifying agent can realize full recycling and realize zero discharge.

Description

technical field [0001] The invention relates to the technical field of waste water treatment, in particular to a method for preparing a water purifying agent for waste water treatment in the papermaking industry. Background technique [0002] Wastewater, especially industrial wastewater, is an important factor of water resource pollution at present. Therefore, wastewater treatment, especially industrial wastewater treatment, is an important issue that people have to solve at present. Therefore, some people use water purifiers for treatment and have achieved certain results. Effect, as the application number is 01111133, the application date is March 19, 2001, and the invention name is a kind of invention patent application for a kind of dispersed combined water purifying agent for purifying sewage and its usage. It discloses a kind of water purifying agent for purifying sewage. Dispersed combined water purifier and its usage. The components of the water purifier are: magnes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52
Inventor 罗斌华
Owner 罗斌华
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