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A kind of solid polyferric sulfate flocculant and preparation method thereof

A solid polymerization, iron sulfate technology, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of poor hydrophobicity, limited adsorption performance, volumetric It can increase the photostability, enhance the hydrophobic effect, and prevent the flocculation failure.

Active Publication Date: 2021-12-28
HENGYANG JIANHENG IND DEV
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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: commonly used polyferric salts have poor hydrophobic performance, and the small volume and density result in limited adsorption performance. It is necessary to develop a flocculation agent with less dosage, high processing efficiency, stable flocculation, and not easy to deteriorate under light. agent

Method used

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  • A kind of solid polyferric sulfate flocculant and preparation method thereof
  • A kind of solid polyferric sulfate flocculant and preparation method thereof
  • A kind of solid polyferric sulfate flocculant and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0047] Modified monomers are prepared by the following steps:

[0048] Step S1, add 4g of anhydrous aluminum chloride and 25mL of resorcinol to the three-neck flask, dropwise add 7mL of benzoyl chloride, raise the temperature to 100°C, react for 8h, after cooling to room temperature, add 10mL of deionized water and stir until Stand still after the precipitate dissolves, separate the organic layer, wash with 5% NaOH solution and deionized water successively, collect the organic layer to obtain a crude product, and distill the crude product to remove resorcinol and deionized water under reduced pressure , after cooling, a solid was precipitated, filtered by suction, washed with water, recrystallized with ethanol, and dried to obtain intermediate 1;

[0049] Step S2, add 0.1 mol of triethylamine and 40 mL of tetrahydrofuran to 0.1 mol of intermediate 1, stir to dissolve, add dropwise 20 mL of chloroacetyl chloride and tetrahydrofuran in an ice bath in a mixed solution with a mass...

Embodiment 2

[0055] Modified monomers are prepared by the following steps:

[0056] Step S1, add 5g of anhydrous aluminum chloride and 30mL of resorcinol to the three-neck flask, dropwise add 10mL of benzoyl chloride, raise the temperature to 100°C, react for 8h, after cooling to room temperature, add 15mL of deionized water and stir until Stand still after the precipitate dissolves, separate the organic layer, wash with 5% NaOH solution and deionized water successively, collect the organic layer to obtain a crude product, and distill the crude product to remove resorcinol and deionized water under reduced pressure , after cooling, a solid was precipitated, filtered by suction, washed with water, recrystallized with ethanol, and dried to obtain intermediate 1;

[0057] Step S2: Add 0.15 mol of triethylamine and 50 mL of tetrahydrofuran to 0.15 mol of intermediate 1, stir and dissolve, then add dropwise 30 mL of a mixed solution of chloroacetyl chloride and tetrahydrofuran at a mass ratio o...

Embodiment 3

[0063] A kind of solid polyferric sulfate flocculant, comprises the raw material of following weight portion:

[0064] Fe 2 (SO 4 ) 3 ·xH 2 20 parts of O, 8 parts of water glass, 2 parts of KH-5602, 10 parts of acrylamide, 8 parts of modified monomer, 1 part of chain extender DA, 0.5 parts of sodium formaldehyde sulfoxylate, 1 part of Span-20, ammonium persulfate 3 copies;

[0065] This kind of solid polyferric sulfate flocculant is made by the following steps:

[0066] Step A1, the Fe 2 (SO 4 ) 3 ·xH 2 Add O into deionized water, heat and stir at 65°C to dissolve, add sodium hydroxide, and mature at 30°C for 30 minutes to prepare mixed solution a, wherein the amount of deionized water is Fe 2 (SO 4 ) 3 ·xH 2 3 times the mass of O, the amount of sodium hydroxide is Fe 2 (SO 4 ) 3 ·xH 2 0.5 times the mass of O;

[0067] Step A2, add water glass into deionized water, adjust the pH to 6 with 0.1g / mL hydrochloric acid, add KH-560 after stirring for 2 hours, stir a...

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Abstract

The invention discloses a solid polyferric sulfate flocculant, which comprises the following raw materials in parts by weight: Fe 2 (SO 4 ) 3 ·xH 2 O 20‑30 parts, water glass 8‑10 parts, KH‑5602‑4 parts, acrylamide 10‑15 parts, modified monomer 8‑10 parts, chain extender DA1‑3 parts, formaldehyde sulfoxylate 0.5-1 parts of sodium, 1-2 parts of Span-20, and 3-5 parts of ammonium persulfate; the invention also discloses a preparation method of the flocculant. Polymerized ferric silicate sulfate is modified with organic macromolecular flocculant acrylamide through aqueous solution polymerization process to prepare composite flocculant, increase the molecular chain of flocculant, and add a small amount of functional modified monomer to it, namely It can enhance the hydrophobic interaction between polymer molecular chains to stabilize its performance and improve the application efficiency of water treatment. It can also add photostability to prevent ultraviolet radiation from accelerating the photodegradation rate and causing flocculation failure.

Description

technical field [0001] The invention belongs to the technical field of flocculants, and relates to a solid polyferric sulfate flocculant and a preparation method thereof. Background technique [0002] Among all kinds of sewage and wastewater treatment methods, the flocculation and precipitation method is the most commonly used secondary treatment method. When the flocculant is added to the water body to be treated, through a series of processes such as precipitation, hydrolysis and polymerization, the final polymer produced Further chemical interaction with impurity particles to generate larger flocculation sediments for removal. [0003] According to the chemical composition of flocculants, it can be divided into four categories: organic, inorganic, composite and biological flocculants, each with its own advantages and disadvantages. The composition of inorganic small molecule flocculants is mainly inorganic salts, commonly used are aluminum sulfate, iron sulfate, chlorine ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F220/60C02F1/52C02F1/54C02F1/56
CPCC08F220/56C02F1/52C02F1/56C02F1/54C02F1/5236C08F220/603
Inventor 黄河
Owner HENGYANG JIANHENG IND DEV
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