Natural composite polyaluminium chloride water treatment agent and preparation method thereof

A polyaluminum chloride, water treatment technology, applied in water/sewage treatment, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problems of secondary pollution of residual substances, poor adsorption capacity, etc., and achieve beneficial degradation performance , the effect of reducing usage and improving bridging capacity

Pending Publication Date: 2020-08-25
NANNING XIAYANG CHEM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problem that the existing polyaluminum chloride has poor adsorption capacity as a coagulant and secondary pollution caused by residual substances, the present invention provides a natural composite polyaluminum chloride water treatment agent and a preparation method thereof, which can improve polyaluminum chloride The flocculation performance and natural degradation performance of water treatment chemicals can reduce Al 3+ residual amount of

Method used

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  • Natural composite polyaluminium chloride water treatment agent and preparation method thereof
  • Natural composite polyaluminium chloride water treatment agent and preparation method thereof
  • Natural composite polyaluminium chloride water treatment agent and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0030] A natural composite polyaluminum chloride water treatment agent includes the following components: polyaluminum chloride, polyacrylamide modified starch, etherified modified chitosan, and glacial acetic acid.

[0031] The preparation method of the natural composite aluminum chloride water treatment agent includes the following steps:

[0032] (1) In terms of parts by weight, dissolve 35 parts of modified starch in 35 parts of distilled water, stir and disperse, and then add modified chitosan according to the mass ratio of modified starch to modified chitosan at 1:1 , Add 0.5mL / g modified starch glacial acetic acid after heating to 60°C, and stop the reaction with cold water after 1.5h reaction to obtain mixed liquid a;

[0033] (2) In 25 parts of polyaluminum chloride solution, add 5% by mass of the mixed solution a under stirring conditions, and rapidly stir the reaction for 2 hours to completely dissolve, to obtain a composite aluminum chloride water treatment agent.

[0034]...

Embodiment 2

[0044] A natural composite polyaluminum chloride water treatment agent includes the following components: polyaluminum chloride, polyacrylamide modified starch, etherified modified chitosan, and glacial acetic acid.

[0045] The preparation method of the natural composite aluminum chloride water treatment agent includes the following steps:

[0046] (1) In terms of parts by weight, dissolve 50 parts of modified starch in 40 parts of distilled water, stir and disperse, then add modified chitosan according to the mass ratio of modified starch to modified chitosan of 6:1 After heating to 80°C, adding 1mL / g of glacial acetic acid of modified starch, reacting for 2h and then terminating the reaction with cold water to obtain mixed liquid a;

[0047] (2) In 30 parts of polyaluminum chloride solution, add 15% of the mass of mixed solution a under stirring conditions, and quickly stir and react for 3 hours to completely dissolve to obtain a composite aluminum chloride water treatment agent. ...

Embodiment 3

[0058] A natural composite polyaluminum chloride water treatment agent includes the following components: polyaluminum chloride, polyacrylamide modified starch, etherified modified chitosan, and glacial acetic acid.

[0059] The preparation method of the natural composite aluminum chloride water treatment agent includes the following steps:

[0060] (1) According to the weight ratio, dissolve 40 parts of modified starch in 40 parts of distilled water, stir and disperse, then add modified chitosan according to the mass ratio of modified starch to modified chitosan 4:1 , After heating to 70℃, adding 0.8mL / g of modified starch glacial acetic acid, reacting for 2h and then terminating the reaction with cold water to obtain mixed liquid a;

[0061] (2) In 28 parts of polyaluminum chloride solution, add 10% of the mass of mixed solution a under stirring conditions, and quickly stir for 3 hours to completely dissolve to obtain a composite aluminum chloride water treatment agent.

[0062] The...

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Abstract

The invention provides a natural composite polyaluminium chloride water treatment agent and a preparation method thereof. The water treatment agent is mainly prepared from polyaluminium chloride, polyacrylamide modified starch, etherified modified chitosan and glacial acetic acid. The quaternary ammonium salt modified starch is good in water solubility and can play a role in charge neutralizationand bridge adsorption with particles in water, so that the particles in the system are destabilized and flocculated, and etherified modified chitosan is stronger in electropositivity and more beneficial to flocculation. According to the method, colloidal particles in the water body can be strongly adsorbed through electric neutralization, adsorption bridging and net capturing effects by utilizingthe bridging effect of natural polymer substances and combining the charge neutralization effect of polyaluminum chloride, so that the colloid is flocculated and settled, the solubility of a treatmentagent is improved, the residual quantity of aluminum ions is reduced, and secondary pollution is avoided.

Description

Technical field [0001] The invention belongs to the technical field of water treatment, and particularly relates to a natural composite polyaluminum chloride water treatment agent and a preparation method thereof. Background technique [0002] With the development of the economy, the environmental pollution situation has become increasingly severe, and the problem of water pollution has become particularly prominent. "Coagulation-sedimentation-filtration-disinfection" is a commonly used treatment process for effluent surface water bodies, in which coagulation is the core of the process, and the performance of the coagulant directly affects the quality of the effluent. Among the coagulants currently used in our country, the amount of inorganic polymer coagulant accounts for more than 80%. It is a type of polymer coagulant developed on the basis of traditional aluminum salt and iron salt. , Also known as basic aluminum chloride, is a widely used inorganic polymer flocculant. It ha...

Claims

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Application Information

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IPC IPC(8): C02F1/52C02F1/56C02F1/28
CPCC02F1/5236C02F1/5263C02F1/56C02F1/281C02F1/286
Inventor 韦明
Owner NANNING XIAYANG CHEM TECH CO LTD
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