A kind of preparation method of polyaluminum calcium silicate-sodium alginate composite flocculant

A composite flocculant and sodium alginate technology, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water/sludge/sewage treatment, etc., can solve complex preparation process, general flocculation effect, and chemical residues and other problems, to achieve the effect of simple operation, good flocculation effect, and enhanced electric neutralization mechanism

Active Publication Date: 2020-08-11
JILIN INST OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cost is low, but the flocs are small, loose and unstable; polyacrylamide flocculants have good flocculation effect but the preparation process is complicated and there are chemical residues; bioflocculants have macromolecular natural organic substances such as chitosan and starch without Toxic and biodegradable, but the flocculation effect is average

Method used

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  • A kind of preparation method of polyaluminum calcium silicate-sodium alginate composite flocculant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Prepare 0.15mol / L sodium silicate solution and slowly add 20% H 2 SO 4 Adjust the pH to 3, stir in a water bath for 2 hours, let stand and mature for 24 hours to prepare polysilicic acid, add 6.6ml of 0.4mol / L aluminum salt, 1.7ml of 0.8mol / L calcium salt, stir in a water bath at 40°C for 2 hours, let stand and mature for 24 hours, Preparation of calcium aluminum silicate flocculant.

[0044] Use 1% acetic acid to pre-treat sodium alginate, prepare 7.5% sodium alginate solution, stir in a water bath at 60°C for 1.5 hours, take 8ml and add it to polyaluminum calcium silicate flocculant, stir and heat, let stand and mature for 24 hours to obtain Polyaluminum calcium silicate-sodium alginate composite flocculant.

[0045] Take an appropriate amount of polyaluminum calcium silicate-sodium alginate composite flocculant and add it to the simulated water sample. The flocculation efficiency is significantly improved, and the flocs are compact, and the effect is remarkable. Th...

Embodiment 2

[0047] Prepare 0.20mol / L sodium silicate solution and slowly add 20% H 2 SO 4 Adjust the pH to 4, stir in a water bath for 2 hours, let stand and mature for 12 hours to prepare polysilicic acid, add 7.4ml of 0.4mol / L aluminum salt, 0.8ml of 0.8mol / L calcium salt, stir in a water bath at 50°C for 2 hours, let stand and mature for 12 hours, Preparation of calcium aluminum silicate flocculant.

[0048] Pre-treat sodium alginate with 1% acetic acid, prepare a 6% sodium alginate solution, stir in a water bath at 50°C for 2 hours, take 6ml and add it to the polyaluminum calcium silicate flocculant, stir and heat, stand and mature for 12 hours to obtain Polyaluminum calcium silicate-sodium alginate composite flocculant.

[0049] Take an appropriate amount of polyaluminum calcium silicate-sodium alginate composite flocculant and add it to the simulated water sample. The flocculation efficiency is significantly improved, and the flocs are compact, and the effect is remarkable. The me...

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Abstract

The invention discloses a preparation method of a poly-aluminum silicate calcium-sodium alginate composite flocculating agent. The preparation method comprises following steps: a sodium silicate solution with a concentration ranging from 0.15 to 0.20mol / L is prepared, the pH value of the sodium silicate solution is adjusted, and activation is carried out so as to obtain a light blue polysilicic acid solution; 0.3 to 0.8mol / L aluminium salt and 0.6 to 1.0mol / L of calcium salt are added into the light blue polysilicic acid solution, and activation is carried out so as to obtain a poly-aluminum silicate calcium flocculating agent; a sodium alginate solution obtained through pre-treatment is added into the poly-aluminum silicate calcium flocculating agent, water bath stirring is carried out, an obtained product is subjected to standing and aging so as to obtain the poly-aluminum silicate calcium-sodium alginate composite flocculating agent. According to the preparation method, the inorganic-natural organic composite flocculating agent prepared from sodium alginate and poly-aluminum silicate calcium through combination possesses the advantages of inorganic flocculating agent and naturallarge molecules. The preparation method is simple in operation; the raw materials are easily available; the cost is low; the poly-aluminum silicate calcium-sodium alginate composite flocculating agent is nontoxic, is friendly to the environment, is degradable, and can be widely used in the fields of domestic water and industrial wastewater processing.

Description

technical field [0001] The invention relates to the technical field of inorganic-natural organic composite flocculant, and more specifically relates to a preparation method of polyaluminum calcium silicate-sodium alginate composite flocculant. Background technique [0002] In recent years, due to the rapid development of various industries, environmental problems, especially water pollution, have become increasingly serious. In order to alleviate water pollution, water purification methods such as adsorption, membrane filtration, and chemical oxidation have been developed. However, compared with the above technologies, flocculation is due to The processing cost is low, the efficiency is high and the development is rapid. Flocculation is mainly used for solid-liquid separation through the aggregation process of colloidal particles, and the selection of flocculant is the core technology of flocculation. [0003] Flocculants can be divided into chemical flocculants, chemical sy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C02F1/56
CPCC02F1/5236C02F1/56
Inventor 娄大伟马捷连丽丽张浩王希越高文秀王润楠祝波
Owner JILIN INST OF CHEM TECH
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