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Preparation method of composite flocculant

A flocculant and composite technology, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water/sewage treatment, etc., can solve the problems of underutilization and low dosage of chlorosilane, and achieve reuse , the effect of saving costs and improving the efficiency of sewage treatment

Inactive Publication Date: 2018-11-09
ANHUI LEJIN ENVIRONMENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent No. 200910300930.8 "New Synthesis Method of Copolymerized Silicate Flocculant" In the middle and late stages of the polymeric chloride flocculant synthesized by the traditional method or to the existing polymeric chloride liquid flocculant, the modified method is added with perchlorosilane A polysilicate flocculant with better turbidity removal effect is obtained, but the method does not fully utilize the property that hydrolysis of chlorosilane produces a large amount of hydrochloric acid, so the amount of chlorosilane is relatively small

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  • Preparation method of composite flocculant

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Embodiment 1

[0022] A composite flocculant, made of the following parts by weight: 150 parts by weight of bentonite, 8 parts by weight of chitosan, 10 parts by weight of 2,3-epoxypropyltrimethylammonium chloride, azobisiso 3 parts by weight of dimethyl butyrate, 30 parts by weight of magnesium aluminum silicate (the content of aluminum oxide is 35.6%), 30 parts by weight of silicon tetrachloride waste liquid (55.27wt%), 5 parts by weight of aminopropyltriethoxysilane parts by weight, 5 parts by weight of N-hydroxyethylacrylamine, and 45 parts by weight of ethylene glycol diglycidyl ether.

[0023] The preparation method of described composite flocculant comprises the following steps:

[0024] (1) Modification of bentonite: calcining bentonite at 350°C for 3 hours, then adding hydrochloric acid solution for ultrasonic treatment for 25 minutes, and then washing with ionized water until the pH is 6.3 to obtain modified bentonite;

[0025] Mix modified bentonite, 2,3-epoxypropyltrimethylammon...

Embodiment 2

[0030] A composite flocculant, made of the following parts by weight: 180 parts by weight of bentonite, 10 parts by weight of chitosan, 8 parts by weight of 2,3-epoxypropyltrimethylammonium chloride, azoisobutyl 5 parts by weight of cyanoformamide, 25 parts by weight of magnesium aluminum silicate (the content of aluminum oxide is 35.6%), 35 parts by weight of silicon tetrachloride waste liquid (55.27wt%), 3 parts by weight of aminopropyltriethoxysilane parts, 3 parts by weight of N-hydroxyethyl acrylic acid amine, and 50 parts by weight of ethylene glycol diglycidyl ether.

[0031] The preparation method of described composite flocculant comprises the following steps:

[0032] (1) Modification of bentonite: calcining bentonite at 400°C for 2 hours, then adding hydrochloric acid solution for ultrasonic treatment for 20 minutes, and then washing with ionized water until the pH is 6.2 to obtain modified bentonite;

[0033] Mix modified bentonite, 2,3-epoxypropyltrimethylammoniu...

Embodiment 3

[0038] A composite flocculant, made of the following parts by weight: 120 parts by weight of bentonite, 5 parts by weight of chitosan, 12 parts by weight of 2,3-epoxypropyltrimethylammonium chloride, 1 part by weight of imidazoline sodium hydrochloride, 40 parts by weight of magnesium aluminum silicate (the content of aluminum oxide is 35.6%), 25 parts by weight of silicon tetrachloride waste (55.27wt%) liquid, aminoethylaminopropylmethyl dimethyl 8 parts by weight of oxysilane, 8 parts by weight of N-hydroxyethylacrylamine, and 40 parts by weight of ethylene glycol diglycidyl ether.

[0039] The preparation method of described composite flocculant comprises the following steps:

[0040] (1) Modification of bentonite: calcining bentonite at 350°C for 3 hours, then adding hydrochloric acid solution for ultrasonic treatment for 30 minutes, and then washing with ionized water until the pH is 6.5 to obtain modified bentonite;

[0041] Mix modified bentonite, 2,3-epoxypropyltrimet...

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Abstract

Belonging to the technical field of sewage treatment, the invention in particular relates to a composite flocculant. The composite flocculant is prepared from the following substances by weight: 100-200 weight parts of bentonite, 3-15 weight parts of chitosan, 5-15 weight parts of 2, 3-epoxypropyl trimethyl ammonium chloride, 1-5 weight parts of an initiator, 20-45 weight parts of magnesium aluminium silicate, 20-40 weight parts of waste silicon tetrachloride liquor, 3-8 weight parts of a silane coupling agent, 2-10 weight parts of N-hydroxyethyl acrylamide, and 30-60 weight parts of ethyleneglycol diglycidyl ether. The composite flocculant provided by the invention has good flocculation and turbidity removal effects, improves the flocculation effect of the flocculant while making full use of the hydrolysis of silicon tetrachloride residual liquid, at the same time realizes the reuse of pollutants, greatly saves cost, is safe and environment-friendly, and improves the sewage treatmentefficiency.

Description

technical field [0001] The invention relates to the technical field of flocculants, in particular to a composite flocculant. Background technique [0002] In recent years, with rapid economic development and rapid industrial development, water pollution has become increasingly serious; and water is a basic need for human survival. The safety and security of drinking water has already attracted great attention from the country. On July 1, 2007, the newly revised "Drinking Water Sanitation Standard" (GB 5749-2006) was officially implemented, ending the 21-year old standard (GB 5749-1985). The indicators stipulated in the new standard have been greatly increased from the original 35 to 106, and the limits of some indicators are also stricter. In addition, on June 25, 2008, the state issued 11 new and more stringent industry emission standards including pulp and paper, electroplating, and fermentation. This has important practical significance for ensuring people's drinking w...

Claims

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Application Information

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IPC IPC(8): C02F1/52C02F1/54C02F1/56
CPCC02F1/52C02F1/5236C02F1/5263C02F1/54C02F1/545C02F1/56
Inventor 郭常青吴学军
Owner ANHUI LEJIN ENVIRONMENT TECH CO LTD