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Inorganic polymer composite flocculating agent containing polymerized silicic acid and ferric titanium sulfate, and preparation and application thereof

A composite flocculant and inorganic polymer technology, applied in the field of environment and chemistry, can solve the problems of short storage time, achieve long storage time, improve flocculation effect, and improve storage time

Active Publication Date: 2019-04-05
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Claims
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Problems solved by technology

However, both iron salt and titanium salt are easily hydrolyzed, and the storage time is short when the concentration is low, and further research is still needed to improve their storage time and coagulation effect

Method used

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  • Inorganic polymer composite flocculating agent containing polymerized silicic acid and ferric titanium sulfate, and preparation and application thereof
  • Inorganic polymer composite flocculating agent containing polymerized silicic acid and ferric titanium sulfate, and preparation and application thereof

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preparation example Construction

[0024] The invention also discloses a preparation method of polysilicate iron titanium sulfate inorganic polymer composite flocculant, the steps are as follows:

[0025] (1) Pass the 26 mesh sieve after pulverizing the ilmenite sample, adopt the concentration of 5%-98% H 2 5O 4 solution to leach Fe, Ti and other metal elements in ilmenite, and add a certain amount of NaClO to the acid leaching solution 3 Will Fe 2+ converted to Fe 3+ .

[0026] (2) Add TiCl to the pickling solution according to the expected molar ratio of Ti / Fe 1:1~1:10 4 , stirred for 0.5h to make Ti 4+ with Fe 3+ fully responsive.

[0027] (3) concentration is that the sodium silicate solution of 18~37wt% is added dropwise in the dilute hydrochloric acid that concentration is 0.5~1mol / L, controls the pH<2 of solution in the whole reaction process, and the final pH of regulating solution is 1.5, Obtain polysilicic acid solution;

[0028] (4a) Immediately measure a certain volume of iron-titanium sulf...

Embodiment 1

[0040] (1) Weigh 15g ilmenite, add sulfuric acid with a volume fraction of 20% according to the solid-to-liquid ratio of 3:4, take out the pickling solution after shaking and stirring for 24 hours; Dosing TiCl 4 , stirred for 0.5h to make Ti 4+ with Fe 3+ fully responsive.

[0041] (2) Weigh 10.0g Na 2 SiO 3 .9H 2 Dissolve O liquid in about 100mL of water, add it dropwise to dilute hydrochloric acid with a concentration of 0.5-1mol / L, adjust the pH with dilute hydrochloric acid to always be less than 2, and control the final pH to 1.5, and set the volume to 500mL to obtain 0.023927mol / L (as SiO 2 meter) of polymeric silicic acid solution;

[0042] (3) Immediately add the fresh polysilicic acid solution in step (2) to the iron-titanium sulfate solution in step (1) until the Si / Ti ratios are 0.02, 0.05, 0.07, 0.1 (for comparison) , and adding a concentration of 10 wt% Na 2 CO 3 The solution was stirred until the degree of alkalinity was 2.0, and stirred for 2 hours. A...

Embodiment 2

[0045] The steps are the same as in Example 1, the only difference is that in step (1), TiCl is added to the pickling solution according to the Ti / Fe molar ratio of 1:1. 4 .

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Abstract

Disclosed are an inorganic polymer composite flocculating agent containing polymerized silicic acid and ferric titanium sulfate, and a preparation method and application thereof. The inorganic polymercomposite flocculating agent containing the polymerized silicic acid and the ferric titanium sulfate is mainly made from ilmenite, and is obtained by mixing a polymerized silicic acid solution with the concentration of 18-37wt% with an ilmenite acid leaching solution, namely a ferric titanium sulfate solution, according to the molar ratio of Si to Ti being (0.02-0.1):1. The composite flocculatingagent has the advantages of strong adsorption and bridging ability for colloidal substances, good flocculation effect, wide application range and small amount of sludge generated, can be widely applied to the fields such as water supply, wastewater treatment, paper making, textile printing and dyeing and daily chemical, and has a good water treatment effect.

Description

technical field [0001] The invention belongs to the technical field of environment and chemistry, and in particular relates to an inorganic macromolecule flocculant, in particular to a polysilicate ferric titanium sulfate inorganic macromolecule composite flocculant, its preparation method and its application. Background technique [0002] As a conventional water treatment process, coagulation has the advantages of low cost input and low environmental impact, and is one of the priority technologies in water and wastewater treatment. Coagulant is the core of coagulation, which directly determines the efficiency of coagulation process. At present, the iron-based coagulant is one of the most widely used coagulants in the water treatment process, but a single iron-based coagulant will cause the effluent Fe 3+ The high concentration will cause problems such as chromaticity and corrosion, and the efficiency of dealing with increasingly complex water bodies is low. Therefore, it i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/28
CPCC02F1/281C02F1/5236C02F1/5245
Inventor 黄鑫石宝友万杨
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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