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Polymeric aluminum chloride ferric flocculant preparation method using phthalocyanine green waste water

A technology of polyaluminum chloride and phthalocyanine green, which is applied in chemical instruments and methods, iron halides, water/sewage treatment, etc., can solve the problems of narrow pH range of wastewater treatment, adverse environmental effects, and incomplete treatment, etc., and achieve effective Good for environmental protection, fast settling speed, and good color removal effect

Inactive Publication Date: 2004-11-10
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These three preparation methods all have disadvantages such as high cost, complex process, and narrow pH range for treating wastewater (only wastewater with a pH of 4-10 can be treated)
[0004] Phthalocyanine green wastewater contains a large amount of ingredients that can be used to prepare polyaluminum chloride ferric flocculant, which has not been fully utilized at present, which is a serious waste of resources. , will still have an adverse impact on the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take the preparation of 100 kg polyaluminum ferric chloride flocculant as an example.

[0023] Take 1000 kg of phthalocyanine green wastewater discharged from a chemical plant in Jiangsu with a pH value of 1.5 during the production process of phthalocyanine green (the phthalocyanine green wastewater discharged from the adsorption section is preferably selected, because the content of copper ions is the highest), in the wastewater Add 10 kilograms of iron filings, the particle size is 80 orders, and carry out micro-electrolysis reaction, and the reaction time is 60 minutes, makes the copper ion in the waste water be substantially removed (the concentration of copper ion in the waste water after treatment can reach or be lower than " sewage comprehensive discharge The secondary standard in Standard GB8978-1996). The wastewater after micro-electrolysis is filtered to filter out the iron filings after the reaction, and then heated to concentrate to obtain a concentrated sol...

Embodiment 2

[0026] Take the preparation of 100 kg polyaluminum ferric chloride flocculant as an example.

[0027] Take 1000 kg of phthalocyanine green wastewater discharged from the phthalocyanine green production process of a certain chemical plant in Jiangsu (the phthalocyanine green wastewater discharged from the adsorption section is preferably selected, because the content of copper ions is the highest), adjust its pH value to 2, and in this Add 5 kilograms of iron filings in the waste water, iron filings particle size: 10 mesh, carry out micro-electrolysis reaction, reaction time is 30 minutes, makes the copper ion in the waste water be basically removed (the concentration of copper ion in the waste water after treatment can reach or be lower than The secondary standard in the "Integrated Wastewater Discharge Standard GB8978-1996"). The wastewater after micro-electrolysis is filtered to filter out the iron filings after the reaction, and then heated to concentrate to obtain a concen...

Embodiment 3

[0030] Take the preparation of 100 kg polyaluminum ferric chloride flocculant as an example.

[0031] Take 1000 kg of phthalocyanine green wastewater discharged from the phthalocyanine green production process of a chemical plant in Jiangsu (the phthalocyanine green wastewater discharged from the adsorption section is best selected, because its copper ion content is the highest), adjust its pH value to 2.5, in this Add 50 kg of iron filings to the waste water, the particle size of the iron filings is 50 mesh, and carry out the micro-electrolysis reaction. The reaction time is 40 minutes, so that the copper ions in the waste water are basically removed (the concentration of copper ions in the waste water after treatment can reach or be lower than The secondary standard in the "Integrated Wastewater Discharge Standard GB8978-1996"). The wastewater after micro-electrolysis is filtered to filter out the iron filings after the reaction, and then heated to concentrate to obtain a co...

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PUM

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Abstract

A process for preparing polymerized aluminium chloride flocculating agent from phthalocyanine green waste water comprising, (1) subjecting the phthalocyanine green waste water to micro electrolyzation with ferrum, so as to replace the copper ions in the phthalocyanine green waste water, (2) filtering the phthalocyanine green waste water after micro electrolyzation for concentration, the concentration ratio being 10%-80%, (3) stirring the concentrated phthalocyanine green waste water and charging in alkalinizing agents for heating reaction, adjusting waste water till it exhibits weak acidity, continuously stirring and conducting heating reaction for 1h-10h, thus the liquid product according to the invention can be obtained, and its solid product can also be prepared by further drying the liquid product.

Description

technical field [0001] The invention relates to a preparation method of a polyaluminum ferric chloride flocculant, in particular to a method for preparing a polyaluminum ferric chloride flocculant from phthalocyanine green wastewater. Background technique [0002] Phthalocyanine green is a pigment widely used in industry. During its production process, a large amount of strongly acidic wastewater containing high concentrations of copper, aluminum, and chlorine is produced. The current industrial treatment process is to neutralize the wastewater with alkaline substances such as lime to remove The copper and aluminum ions in it are then diluted with water to eliminate the influence of chloride ions on the subsequent biochemical treatment. In this process, a large amount of metal hydroxide-containing waste slag will inevitably be produced, and the metal substances in it will pose a potential threat to the ecological environment of the stacking site, and have not yet been utiliz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/10C02F1/461C02F1/62
Inventor 郑正李磊陈泽智于鑫周玉香牟艳艳邢志强
Owner NANJING UNIV
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