Ferric salt-polyepichlorohydrin-dimethylamine composite flocculant as well as preparation method and application thereof
A polyepichlorohydrin and composite flocculant technology, which is used in flocculation/sedimentation water/sewage treatment, etc., can solve problems such as aluminum biological toxicity, and achieve strong adsorption and bridging ability, high positive charge density, and wide range of dosage. Effect
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Embodiment 1
[0032] A kind of iron salt-polyepichlorohydrin-dimethylamine composite flocculant, the preparation steps are as follows:
[0033] (1) Weigh 29.02g FeCl 3 ·6H 2 O solid in a beaker, add 300mL distilled water, stir with a magnetic stirrer to make FeCl 3 ·6H 2 The O solid is completely dissolved to obtain a ferric chloride solution, and then continue to dissolve 4.73g of anhydrous sodium carbonate powder in (30-60) mL of distilled water under magnetic stirring to obtain a sodium carbonate solution, and add (3-5) mL / Add the sodium carbonate solution dropwise into the ferric chloride solution at a speed of 1 min, and control the degree of alkalinity to 0.5; after the foam disappears, continue to follow the Na 2 HPO 4 12H 2 O and FeCl 3 ·6H 2 Add stabilizer Na at a ratio of O molar ratio of 0.08 2 HPO 4 12H 2 O powder, Na 2 HPO 4 12H 2 After the O powder is completely dissolved, continue to stir and mature for 2 hours, dilute with distilled water until the mass concent...
Embodiment 2
[0037] An iron salt-polyepichlorohydrin-dimethylamine composite flocculant, the preparation steps are the same as in Example 1, the difference is that the distilled water in step (1) is diluted to a mass concentration of iron of 5g / L to obtain polyferric chloride solution, set aside.
Embodiment 3
[0039] An iron salt-polyepichlorohydrin-dimethylamine composite flocculant, the preparation steps are the same as in Example 1, the difference is that in step (1) distilled water is diluted to a mass concentration of iron of 15g / L to obtain polyferric chloride solution, set aside.
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