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Treatment agent for formaldehyde wastewater

A formaldehyde wastewater and treatment agent technology, applied in the direction of adsorption water/sewage treatment, water/sludge/sewage treatment, water pollutants, etc., can solve the problems of poor effect and stability, achieve small particle size, increase carboxyl Quantity, strengthen the effect of adsorption

Inactive Publication Date: 2019-06-07
张芸
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a treatment agent for formaldehyde wastewater in view of the poor effect and stability of the commonly used formaldehyde wastewater treatment agent when treating formaldehyde

Method used

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  • Treatment agent for formaldehyde wastewater

Examples

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preparation example Construction

[0029] The preparation method of composite formaldehyde-removing base material comprises the steps:

[0030] (1) Take the coconut shell and crush it through a 80-mesh sieve in a pulverizer, collect the sieved particles and add 20% potassium hydroxide solution at a mass ratio of 1:12~18, mix evenly, and heat at 55~80°C for 1~3h , filter while it is hot, collect the filter residue and mix it with additives at a mass ratio of 10-15:1, spray and freeze with liquid nitrogen for 2-4 minutes, and then move to a culture room with a temperature of 55-70°C and a humidity of 55-70% to thaw. Take this as a freezing and thawing cycle, carry out 2~4 times, get the pretreated coconut shell, take the pretreated coconut shell and anhydrous ethanol according to the mass ratio of 1:12~20 and mix them in the ultrasonic oscillator, and use 50~60kHz ultrasonic vibration 10~16min, to get the dispersion mixture, according to the mass ratio of 1:4~8:15~25, take the additive, reagent A, and the dispers...

Embodiment 1

[0038] Reagent A: Mix potassium permanganate solution with a mass fraction of 12%, HCl solution with a concentration of 0.1mol / L, and pyridinium chlorochromate at a mass ratio of 1:3:0.03 to obtain reagent A.

[0039] Reagent B: At 35°C, mix N-methylimidazole and allyl chloride in a reaction kettle at a mass ratio of 1:4, protect with nitrogen, stir at 500r / min for 1h, and rotary evaporate at 45°C to 25% of the original volume. %, to obtain reagent B.

[0040] Auxiliary: Mix microcrystalline cellulose and magnesium stearate at a mass ratio of 1:2 to obtain the adjuvant.

[0041] Interface auxiliary material: at 55°C, mix citric acid solution with a mass fraction of 20% and aluminum chloride in a reaction kettle at a mass ratio of 6:1, stir magnetically at 500r / min for 45min, and add 16% of the mass of citric acid solution Mix the fraction with 10% sodium aluminate solution, raise the temperature to 90°C and keep it under reflux for 1 hour to obtain the reaction solution. Take...

Embodiment 2

[0054] Reagent A: Mix potassium permanganate solution with a mass fraction of 12%, HCl solution with a concentration of 0.1mol / L, and pyridinium chlorochromate at a mass ratio of 1:7:0.03 to obtain reagent A.

[0055] Reagent B: At 45°C, N-methylimidazole and allyl chloride were mixed in a reaction kettle at a mass ratio of 1:8, protected by nitrogen gas, stirred at 800r / min for 3h, and rotary evaporated at 60°C to 40% of the original volume. %, to obtain reagent B.

[0056] Auxiliary: Mix microcrystalline cellulose and magnesium stearate at a mass ratio of 1:5 to obtain the adjuvant.

[0057] Interface auxiliary material: at 75°C, mix citric acid solution with a mass fraction of 20% and aluminum chloride in a reaction kettle at a mass ratio of 10:1, stir magnetically at 800r / min for 65min, add 25% of the mass of citric acid solution The fraction is 10% sodium aluminate solution and mixed, the temperature is raised to 100 ° C and refluxed for 3 hours to obtain the reaction so...

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Abstract

The invention discloses a treatment agent for formaldehyde wastewater and belongs to the field of wastewater treatment. According to the treatment agent for formaldehyde wastewater, coconut shell granules are obtained through subjecting coconut shells to crushing and alkali dipping and then are subjected to liquid-nitrogen freezing and pyrolyzing, so that the porosity among the coconut shell granules is improved, and the adsorption capacity is also improved; thiourea added can be combined with formaldehyde as a nucleophilic reagent, and a produced combination can be adsorbed by a diatomite ingredient of the treatment agent, so as to achieve the effect of stably removing the formaldehyde; diatomite is modified with acrylic acid and citric acid containing three -COOH, so that the uniformityof air hole distribution is improved, and the formaldehyde can be adsorbed thoroughly; and abietate added has tackifying and film forming properties and high stability, has certain plasticity and hasgood wettability to the surface of an adherend, so that the treatment agent durably maintains formaldehyde combining and adsorbing stability. According to the treatment agent, the problem that formaldehyde wastewater treatment agents frequently used at present are poor in effect and stability during formaldehyde treatment is solved.

Description

technical field [0001] The invention belongs to the field of waste water treatment, in particular to a treatment agent for formaldehyde waste water. Background technique [0002] Three major public hazards in the natural world: waste water, waste gas, and noise pollution. Waste water is the water that flows out of all useful water after use. It includes domestic sewage, industrial waste water, and other useless water such as primary rain tracks flowing into drainage pipes and canals. Water that cannot be purified to a certain standard after recycling or primary pollution. Wastewater poses great harm to the environment and the biological world: industrial wastewater directly flows into channels, rivers, and lakes to pollute surface water. If it is highly toxic, it will lead to the death or even extinction of aquatic animals and plants; industrial wastewater may also seep into groundwater and pollute groundwater; if Surrounding residents use polluted surface water or groundwa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28B01J20/24B01J20/30C02F101/34
Inventor 张芸
Owner 张芸
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