CN102642902B - Sewage flocculating agent preparation method - Google Patents

Sewage flocculating agent preparation method Download PDF

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Publication number
CN102642902B
CN102642902B CN201210130501.2A CN201210130501A CN102642902B CN 102642902 B CN102642902 B CN 102642902B CN 201210130501 A CN201210130501 A CN 201210130501A CN 102642902 B CN102642902 B CN 102642902B
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China
Prior art keywords
flocculating
temperature
flocculating agent
treatment
cooled
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CN201210130501.2A
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Chinese (zh)
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CN102642902A (en
Inventor
贯硕磉
杜宝燕
陈芳
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廊坊赛瑞贝达科技有限公司
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Abstract

The invention discloses a sewage flocculating agent preparation method. The method includes: adding 2-straightchain alkylamine into mixed liquid of 1-halogen-2,3-epoxypropane with water under the inert gas shielding and under the temperature of T1=0-50 DEG C; heating to the temperature of T2=70-100 DEG C for reaction until pH (potential of hydrogen) of the reaction liquid is equal to or smaller than 7.0; cooling the reaction liquid, adding post-treating agent for treatment, and adjusting the reaction liquid to be neutral to obtain the flocculating agent. The method has the advantages of environment friendliness and simple process due to avoidance of high pressure, high temperature, waste gas, waste water and industrial residue. The flocculating agent obtained by the method has excellent degradability, low ecotoxicity and no stimulation to human body, has evident excellent flocculating effect on treatment of various complex wastewaters, embodies high cost performance in sludge dewatering, and has the advantages of harmlessness to human bodies, remnant avoidance, effectiveness in flocculating and wide application range.

Description

A kind of preparation method of sewage flocculant

Technical field

The present invention relates to a kind of preparation method of water conditioner, especially a kind of preparation method of sewage flocculant.

Background technology

Current World Water pollution becoming serious, water treatment problems also becomes more and more severeer.For solving water pollution problems, the flocculation agent precipitator method are adopted to be widely adopted as the lower-cost water treatment method of one.Flocculation is the important process in water supply safety purification and wastewater treatment, and flocculation agent directly affects flocculating effect.Flocculation agent is mainly used in sewage treatment area, can reduce the sense indexs such as the turbidity of former water, colourity, remove multiple macromolecule organic, heavy metal and radioactive substance.Flocculation both can have independently treatment system of one's own, also can combine with other processing unit process, as pre-treatment, intermediate treatment and final treating processes, also can be used for the concentration process before sludge dewatering, improved the dewatering of mud.

Generally use aluminium salt, polyacrylamide as the flocculation agent of water at present.This two classes flocculation agent in the application effect is general, and especially in sewage or more complicated sewage, effect is bad, can not adapt to the development in modern industry and city; And they have stimulation to human body and degradation property is poor, residual quantity greatly, can cause secondary pollution in water.

Summary of the invention

The technical problem to be solved in the present invention is to provide the preparation method of sewage flocculant of a kind of effective, toxicological harmless, easily degraded.

For solving the problems of the technologies described above, the technical solution used in the present invention is: at T 1=0 ~ 50 DEG C, under protection of inert gas, two straight chain alkyl amines are added in the mixed solution of 1-halogen-2,3-propylene oxide and water; Then T is warming up to 2=70 ~ 100 DEG C of reactions, to pH≤7.0 of reaction solution; Reaction solution is lowered the temperature, then adds post-treatment agent process, then reaction solution is adjusted to neutrality, namely obtain described flocculation agent.

The mol ratio of two straight chained alkyls of the present invention and 1-halogen-2,3-propylene oxide is 1.2:1 ~ 1:1.2.

Preferred two straight chain alkyl amines of the present invention are dimethylamine or diethylamine; Preferred 1-halogen-2,3-propylene oxide is bromo-2, the 3-propylene oxide of epoxy chloropropane or 1-.

Rare gas element of the present invention is nitrogen or carbonic acid gas.

Post-treatment agent of the present invention is selected from S-WAT, hydrogen peroxide, sodium hydroxide, Sulfothiorine or POTASSIUM BOROHYDRIDE.The add-on of described post-treatment agent is 0.01% ~ 1% of reaction solution total mass.

The preferred T of the present invention 1it is 10 ~ 30 DEG C; Preferred T 2it is 80 ~ 90 DEG C.

Preferred reaction liquid reaction of the present invention is 6.0 ~ 7.0 to pH.

Reaction solution of the present invention is cooled to 0 ~ 70 DEG C; Preferably be cooled to 30 ~ 60 DEG C.

Flocculation agent that the present invention obtains has following general formula ():

In formula ():

R1: be selected from H, by a kind of with the saturated of at least one carbon atom or undersaturated alkyl;

R2: be selected from H, by a kind of with the saturated of at least one carbon atom or undersaturated alkyl;

N is 1 ~ 100000;

X: represent a kind of halide-ions combined with positively charged ion, be preferably selected from chlorine, bromine.

The beneficial effect adopting technique scheme to produce is: the inventive method without high pressure, without high temperature, and produces without any three wastes, therefore has environmental protection, the simple feature of technique.The flocculation agent that the present invention obtains has excellent degradation property, eco-toxicity low, non-stimulated to human body, and has significantly excellent flocculating effect to the various complex wastewater of process, and embodies good cost performance to the dehydration of mud; Have human non-toxic's evil, noresidue, feature that flocculating effect is good, applied widely.

Embodiment

Below in conjunction with specific embodiment, the present invention is further detailed explanation.

Embodiment 1: the preparation method of this sewage flocculant adopts following processing step.

Add 200g deionized water, 4.39mol epoxy chloropropane in the reactor, be less than 100ppm with nitrogen replacement to oxygen level, open stirring, be cooled to 10 DEG C, start the 40wt% aqueous solution dripping dimethylamine (4.39mol); Be warming up to 80 DEG C after dimethylamine drips off, constant temperature 10 hours, sampling monitoring pH value, to pH=6.5, be cooled to 60 DEG C, add the S-WAT of reaction solution quality 0.5%, stir 2 hours, then regulate pH to neutral with sodium hydroxide, both obtain finished product.

Embodiment 2: the preparation method of this sewage flocculant adopts following processing step.

Add 400g deionized water, 4.4mol epoxy chloropropane in the reactor, be less than 100ppm with nitrogen replacement to oxygen level, open stirring, be cooled to 30 DEG C, start to drip diethylamine (4.38mol); Be warming up to 70 DEG C after diethylamine drips off, constant temperature 10 hours, sampling monitoring pH value, to pH=6.0; Be cooled to 30 DEG C, add the Sulfothiorine of reaction solution quality 1.0%, stir 1 hour, then regulate pH to neutral with potassium hydroxide, both obtain finished product.

Embodiment 3: the preparation method of this sewage flocculant adopts following processing step.

Add 200g deionized water, bromo-2, the 3-propylene oxide of 4.38mol1-in the reactor, be less than 100ppm with carbon dioxide replacement to oxygen level, open stirring, be cooled to 50 DEG C, start to drip dimethylamine (4.4mol) aqueous solution; Be warming up to 90 DEG C after dimethylamine drips off, constant temperature 10 hours, sampling monitoring pH value, to pH=7.0; Be cooled to 0 DEG C, add the hydrogen peroxide of reaction solution quality 0.1%, stir 3 hours, then regulate pH to neutral with sodium hydroxide, both obtain finished product.

Embodiment 4: the preparation method of this sewage flocculant adopts following processing step.

Add 600g deionized water, bromo-2, the 3-propylene oxide of 4.8mol1-in the reactor, be less than 100ppm with nitrogen replacement to oxygen level, open stirring, be cooled to 0 DEG C, start to drip diethylamine (4.00mol); Be warming up to 100 DEG C after diethylamine drips off, constant temperature 5 hours, sampling monitoring pH value, to pH=6.8; Be cooled to 70 DEG C, add the POTASSIUM BOROHYDRIDE of reaction solution quality 0.2%, stir 2.5 hours, then regulate pH to neutral with potassium hydroxide, both obtain finished product.

Embodiment 5: the preparation method of this sewage flocculant adopts following processing step.

Add 600g deionized water, 4.00mol epoxy chloropropane in the reactor, be less than 100ppm with carbon dioxide replacement to oxygen level, open stirring, be cooled to 20 DEG C, start to drip diethylamine (4.8mol); Be warming up to 85 DEG C after diethylamine drips off, constant temperature 20 hours, sampling monitoring pH value, to pH=6.8; Be cooled to 45 DEG C, add the sodium hydroxide of reaction solution quality 0.01%, stir 1.5 hours, then regulate pH to neutral with sodium hydroxide, both obtain finished product.

Claims (1)

1. a preparation method for sewage flocculant, is characterized in that: add 600g deionized water, bromo-2, the 3-propylene oxide of 4.8mol1-in the reactor, 100ppm is less than to oxygen level with nitrogen replacement, open stirring, be cooled to 0 DEG C, start to drip diethylamine 4.00mol; Be warming up to 100 DEG C after diethylamine drips off, constant temperature 5 hours, sampling monitoring pH value, to pH=6.8; Be cooled to 70 DEG C, add the POTASSIUM BOROHYDRIDE of reaction solution quality 0.2%, stir 2.5 hours, then regulate pH to neutral with potassium hydroxide, get product.
CN201210130501.2A 2012-04-28 2012-04-28 Sewage flocculating agent preparation method CN102642902B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN201210130501.2A CN102642902B (en) 2012-04-28 2012-04-28 Sewage flocculating agent preparation method

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CN102642902B true CN102642902B (en) 2015-01-28

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4566986A (en) * 1984-08-31 1986-01-28 Waldmann John J Flocculating agents and processes for making them
CN1868911A (en) * 2006-06-06 2006-11-29 山东大学 Polyepichlorohydrin-dimethylamine organic polymer coargulator and its preparation technology
CN101531417A (en) * 2009-04-20 2009-09-16 吴江市恒茂电子科技有限公司 Inorganic composite floculant, its preparation method and use in treating high-concentration dye-printing desizing waste water

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4566986A (en) * 1984-08-31 1986-01-28 Waldmann John J Flocculating agents and processes for making them
CN1868911A (en) * 2006-06-06 2006-11-29 山东大学 Polyepichlorohydrin-dimethylamine organic polymer coargulator and its preparation technology
CN101531417A (en) * 2009-04-20 2009-09-16 吴江市恒茂电子科技有限公司 Inorganic composite floculant, its preparation method and use in treating high-concentration dye-printing desizing waste water

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