Novel polyaluminum chloride water purifying agent and preparation method thereof

A technology of polyaluminum chloride and water purifying agent, applied in chemical instruments and methods, water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as high cost, and solve the problem of limited adjustment of polymerization degree Effect

Active Publication Date: 2019-04-26
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 purifying agent and preparation method thereof
  • Novel polyaluminum chloride water purifying agent and preparation method thereof
  • Novel polyaluminum chloride water purifying agent 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. Polyaluminum chloride contains 10wt%-12wt% of aluminum oxide, has basicity being 70 wt%-95wt%, contains lower than or equal to 0.1wt% of water insoluble substances and has pH (10g/L aqueous solution) being 4.5-5.0. The preparation method of the polyaluminum chloride water purifying agent comprises the following steps: preparing aluminum-containing mother liquor, and performing high-speed dispersion and homogenization to obtain homogenized mother liquor; adding an alkaline regulator under the condition of high-speed dispersion to adjust the polymerization degree, and performing continuous reaction to obtain the polyaluminium chloride water purifying agent. The novel polyaluminum chloride water purifying agent has the advantages of high aluminum, high basicity, high flow dispersibility, wider pH application range, better coagulation effect, COD removal rate up to 50% or higher and TP removal rate up to about 99%. In the preparation method, the high-speed dispersion technology is adopted to homogenize the aluminum-containing mother liquor and the polymerization degree and adjust reaction procedure, so that the defect of limited polymerization degree adjustment of the traditional alkali adjustment system is overcome, and complete slag-free continuous production of water purifying agent with high polymerization degree is achieved.

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 polyaluminum) 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 mainl...

Claims

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Application Information

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Patent Type & Authority Applications(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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