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Novel polyaluminum chloride water purifier and preparation method thereof

A technology of polyaluminum chloride and water purifying agent, which is applied in chemical instruments and methods, water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as high cost, and achieve secondary crystallization and applicable pH Wide range, significant economic and environmental benefits

Active Publication Date: 2021-10-01
CHANGZHOU WUJIN YOUBANG WATER PURIFICATION MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome defects such as calcium sulfate crystallization, polyaluminum residue, and high cost in the existing polyaluminum chloride production process, and provide a new type of polyaluminum chloride water purifier

Method used

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  • Novel polyaluminum chloride water purifier and preparation method thereof
  • Novel polyaluminum chloride water purifier and preparation method thereof
  • Novel polyaluminum chloride water purifier and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A novel polyaluminum chloride water purifying agent, its preparation method is as follows:

[0039] S1. Preparation of aluminum-containing mother liquor: add aluminum-containing waste slag to the purified and pretreated acetophenone waste acid for acid-dissolving reaction, stir and react at normal temperature and pressure for 2 hours until the aluminum-containing waste slag is completely dissolved, and the active ingredient is AlCl 3 Aluminum brine, add 1‰ of TMT liquid heavy metal scavenger to the aluminum brine for pretreatment to remove heavy metals, stir and react for 1 hour, let it settle for 3 hours, and obtain the light yellow supernatant aluminum-containing mother liquor after solid-liquid separation;

[0040] S2. High-speed dispersion and homogenization: raise the temperature of the aluminum-containing mother liquor in S1 above to 70°C, and disperse at a high speed to obtain a homogenized mother liquor;

[0041] S3. Polymerization adjustment: under high-speed d...

Embodiment 2

[0047] A new type of polyaluminum chloride water purifying agent, its preparation method is basically the same as that of Example 1, the difference is that the high-speed dispersion speed in S1 and S2 is 11000r / min.

Embodiment 3

[0049] A new type of polyaluminum chloride water purifying agent, its preparation method is basically the same as that of Example 1, the difference is that the high-speed dispersion speed in S1 and S2 is 14000r / min.

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Abstract

The invention discloses a novel polyaluminum chloride water purifying agent and a preparation method thereof. The aluminum oxide of the polyaluminum chloride is 10-12wt%, the basicity is 70-95wt%, the water-insoluble matter is ≤0.1wt%, and the pH (10g / L aqueous solution) value is 4.5-5.0, and its preparation method includes the following Steps: preparing aluminum-containing mother liquor, high-speed dispersion and homogenization to obtain a homogenized mother liquor, adding an alkaline regulator under high-speed dispersion conditions to adjust the degree of polymerization, and continuing the reaction to obtain a polyaluminum chloride water purifying agent. The new polyaluminum chloride water purifying agent of the present invention has high aluminum, high basicity, high flow dispersibility, wider pH application range, better coagulation effect, COD removal rate can reach more than 50%, and TP removal rate can reach About 99%, in the preparation method of the present invention, the high-speed dispersion technology is used to homogenize the aluminum-containing mother liquor and the polymerization degree adjustment reaction process, which overcomes the limitation of the polymerization degree adjustment of the traditional alkali adjustment system and realizes the high polymerization degree water purifier Completely slag-free continuous production.

Description

technical field [0001] The invention relates to the technical field of flocculant preparation, more specifically, to a novel polyaluminum chloride water purifying agent and a preparation method thereof. Background technique [0002] Polyaluminum chloride (PAC, referred to as polyaluminium) is between AlCl 3 and Al(OH) 3 A water-soluble inorganic high molecular polymer, which has a high degree of neutralization and bridging effect on colloids and particles in water, and can strongly remove micro-toxic substances and heavy metal ions. It has stable properties and is currently the most widely used in the market. One of the inorganic flocculants, widely used in drinking water purification, industrial wastewater treatment such as printing and dyeing wastewater, paper pulping wastewater, brewery wastewater, etc., with superior water purification performance and remarkable effect. [0003] In recent years, the preparation technology of polyaluminum chloride on the market has main...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52
CPCC02F1/5236
Inventor 左选凤居银栋蒋银峰孙戎斐张军峰杜苏红
Owner CHANGZHOU WUJIN YOUBANG WATER PURIFICATION MATERIALS
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