CN103641225B - Instant flocculating agent and preparation method thereof - Google Patents
Instant flocculating agent and preparation method thereof Download PDFInfo
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Abstract
The invention discloses an instant flocculating agent which comprises anionic polyacrylamide, a cosolvent and an accelerant, wherein the cosolvent comprises polybasic carboxylic acid and monobasic carboxylate; the accelerant is a weak-acid sodium salt; in the raw materials, the dry weight ratio of anionic polyacrylamide, polybasic carboxylic acid, monobasic carboxylate and weak-acid sodium salt is (5-9):(0.1-3):(0.5-4):(0.1-3). A preparation method of the instant flocculating agent comprises the following steps: sequentially adding the anionic polyacrylamide, polybasic carboxylic acid, monobasic carboxylate and weak-acid sodium salt into a reactor respectively; stirring for dispersion at a temperature of 10-50 DEG C; performing a composite reaction for 0.5-3 hours so as to obtain the instant flocculating agent. The instant flocculating agent disclosed by the invention has the advantages of small product dosage, low cost and good flocculation effect; secondary pollution to a water body is avoided, the dissolution rate is adjustable, and the instant flocculating agent can adapt to the wastewater with varying water body. Moreover, the production process is simple and environment-friendly with low energy consumption, high efficiency and high operability.
Description
Technical field
The present invention relates to a kind of Instant flocculation agent for wastewater treatment, particularly a kind of Instant flocculation agent and preparation method thereof being mainly used in coal washing, ore dressing field wastewater treatment.
Background technology
In field of waste water treatment, flocculation agent is a kind of medicament that can make particle coagulation and the sedimentation be dispersed in water used widely, can reach the effect of purifying water body.Known flocculation agent kind has a lot, and those have long chain molecule structure and the flocculation agent presenting high-hydrophilic is called as water-soluble polymer flocculation agent.Be dissolved in the character of subsidiary static charge in water according to it, be divided into negatively charged ion, positively charged ion, non-ionic flocculant three kinds.Suspended substance major part in water exists with the form of colloid, according to the difference of the electrically charged property of micelle surface institute, needs to select suitable species that surface can be made to form a large amount of alumen ustum, the efficiently turbidity of reduction water body when disposing of sewage.
Polyacrylamide is current most widely used, polymer organic synthesis flocculation agent that usefulness is the highest in the world, and Ye Shi China uses maximum flocculation agents at present.The amide group (-CONH of polyacrylamide (PAM)
2) can affine with many materials, adsorb and form hydrogen bond.High molecular PAM, being formed " bridging " by between the particle that adsorbs, makes several even dozens of particle link together, and generates floc sedimentation, and accelerated particle sinks.PAM molecular weight is high by (10
3~ 10
7), also can introduce various ionic group obtains specific performance to tunable molecular weight.This makes it become optimal flocculation agent.PAM flocculation agent is mainly used to process source water and various waste water.The advantage compared with conventional inorganic flocculation agent and other type organic floculant is: wide in variety, and the body refuse can adapt to multiple condition, molecular weight is high, consumption is little, price is low, efficiency is high, generating is few, and aftertreatment is easy.
Anionic polyacrylamide is in a large number in coal washing ore dressing process.Process black water, can reclaim a large amount of coal slime, can prevent again Heisui River from polluting, and colliery can be made to realize water cycle, water saving.Add PAM before filtration during floatation clean coal, filtration velocity and filter cake weight can be increased, thus improve throughput; Usually use a large amount of water in ore dressing process, finally often must be separated useful solid mineral from water or the aqueous solution, and use is reclaimed in purification of waste water.Using polypropylene acid amides flocculation agent, can impel the sinking that useful solid matter is very fast, promotes the clarification of liquid and the dehydration of mud cake, thus can enhance productivity, and reduces tailing stream and to become estranged water consumption, reduce facility investment and tooling cost, reduce environmental pollution.Along with the change of ore bed in recovery process, ore grade is different, and the wastewater property that washing produces is comparatively complicated and changeable, and polyacrylamide flocculant subject range is wider, can reach satisfied treatment effect by regulating different index product.
Polyacrylamide flocculant is high molecular polymer, and during use, solid dry powder need be configured to the flocculant aqueous solution of 0.1%, and dissolve in water and need the process that experience elder generation is swelling, dissolve again, general commercial polyacrylamide product dissolution time is 1 hours.And in coal washing, Mineral Processing Industry, because production technique water consumption is huge, polyacrylamide flocculant demand is large, for saving floor space and equipment investment cost, the volume of equipment of on-the-spot dissolving polyacrylamide flocculant is often limited, therefore usually require that flocculation agent dissolution time is short, adopt the mode that on-line dilution dissolves can meet production and application demand.Therefore, the solvability index of polyacrylamide flocculant product becomes its important performance indexes applied and sales contest condition.
In order to overcome current ubiquitous coal washing, ore dressing polyacrylamide flocculant dissolution rate is slow, molten medicine device processes ability and production and application require unmatched problem, prevent because polyacrylamide flocculant dissolution rate restricts wastewater treatment working section output and integral production ability slowly, prevent not dissolving complete flocculation agent and use the stifled equipment pipeline of micelle dirt and hay tank that cause reluctantly, exempt the trouble that labor cleaning brings, reduce because the stifled differential pressure of equipment dirt raises the stopping production hidden danger brought, the financial loss that the waste that complete medicament is not dissolved in minimizing causes, Chinese scholars has done a large amount of fast-solving polyacrylamide flocculation agent research work from different angles.
Publication number is " treating agent for papermaking wastewater " of CN102040269A, is made up of, is produced into liquid flocculation agent W-Gum, polyacrylamide, 3-chloro-2-hydroxypropyl-trimethyl ammonium chloride, sodium-acetate, water.Rationally, result of use meets the particular requirement of field of papermaking to this invention formula, and liquid flocculation agent is convenient to dissolve, shortcoming causes transportation cost to increase, and effective content is low, and scene need take larger space and set up storage tank and can meet continuous seepage requirement, liquid is easily degraded, and flocculating property declines; The aobvious alkalescence of overall medicament, is not suitable for acid waste water, is limited to field of papermaking and uses, be not suitable for the water quality that the industry such as coal washing, ore dressing is changeable.
Due to the application of liquid flocculation agent existing above-mentioned defect, improve the solubility study that polyacrylamide solvability mainly concentrates on solid polypropylene acid amides.Publication number is " preparation method of instant cationic polyacrylamide " of CN101921365A, from production technique, urea is with the addition of as reagent and additive in polymerization in polyacrylamide polymerization process, because inner homogeneous distributes diffluent urea after the polymerisate formed is water-soluble, destroy the hydrogen bond formed between PAM molecule and water molecules, therefore improve the speed that water permeates to polyacrylamide particle, after molten water, particle is formed cellular, add the surface-area contacted with water, dissolution rate is added from this body structure of product, weak point is the water content that addition conference increases PAM, reduce its molecular chain length, and the later stage through fluidised bed drying time to produce knot fast, reduce result of use.Publication number is " a kind of preparation method of high molecular weight instant cationic flocculant " of CN101747472A, the segmentation of Oxidizing and Reducing Agents composite initiation system is adopted to cause, reduce the temperature of reaction of polymkeric substance, form straight chain polymer product, reduce the crosslinking degree of product, improve dissolution rate, but cationic monomer is because poly-rate is different unexpectedly from acrylamide monomer simultaneously, under low-temp reaction condition, cationic monomer can not participate in the middle of copolyreaction completely, causes the large and product cation ionization degree reduction of the residual quantity of cationic monomer.Publication number is mention in " polymeric flocculant; produce the method for this flocculation agent and adopt the method for this flocculation agent process water " of CN1197769A producing the acid salt adding organic acid or mineral acid in polyacrylamide, as hydrosulfate and hydrophosphate etc., organic acid adds cyanogen key in the Substance Transformation polyacrylamides such as acetic acid, lactic acid or phenols to improve the water miscible method of flocculation agent.Add auxiliary agent in the method production process flocculation agent long-chain to be constructed change, stable in properties, produce and cyano group is converted into formamyl by single job and then is converted into carboxyl or carboxylate salt, react easy; But deficiency is that carboxyl-content is fixed because after production, cyano group transformation efficiency cannot regulate, and is difficult to the polytropy water quality adapting to coal washing field.
Improve the deliquescent method of polyacrylamide in view of starting with from change polymerization technique above, all there is negative impact to product, and produce in polyacrylamide process, the acrylamide monomer of employing has neurotoxicity and carinogenicity.Domestic manufacturer mostly uses and finished product polyacrylamide is added a large amount of inorganic salt and significantly reduce the method for active constituent content to improve its dissolution rate simultaneously, but so, not only substantially increase dosage, increase labour intensity when using, and the ionic concn in water is strengthened, meanwhile, auxiliary agent is dissolved in ionization in water and generates a large amount of chlorions, very easily with iron and steel pipeline generation galvanic corrosion, cause conduit failure and threaten production safety.Such as: publication number is " coal washing water treating agent " of CN102107937A, by adding magnesium chloride in polyacrylamide, calcium chloride, sodium sulfate improves polyacrylamide flocculation rate, thus accelerate black water coal and water separate process, clear water layer is clarified more, but these auxiliary agents do not play obvious improvement result to the solubilization-aid effect of PAM.Publication number is " a kind of coal washing water treating agent " of CN101045571A, by polyacrylamide being spread on moisture magnesium chloride, magnesium sulfate, sodium-chlor, calcium chloride, calcium oxide composition grain, make it dispersed and swelling in advance, shorten the time swelling in polyacrylamide dissolution process thus, thus reduce the overall dissolution time of polyacrylamide; But still it is limited to there is composition comprises water, polyacrylamide degree of swelling is low, and the polyacrylamide of water absorption and swelling is easily degraded inefficacy, causes the quality guaranteed period significantly to shorten, the adverse consequences that result of use declines.Publication number is CN101041493A " a kind of coal washing water treating agent and preparation method thereof ", and it is 40 ~ 100 object polyacrylamide fine particle polyacrylamides and water content 4% ~ 15% granularity 0.2 ~ 2.0 millimeter of magnesium chloride Homogeneous phase mixing that this patent limits fineness.Because polyacrylamide fineness is little, specific surface area is large, and contact dissolving speed is fast; Polyacrylamide and the first part water absorption and swelling of hydrated magnesium chloride salt premix, shorten the dissolution time in water.Defect is easy degradation problem after remaining polyacrylamide water suction; Swelling rear polyacrylamide humidity is strong, the group of sticking into each other, mobility is bad, impact is produced and is added metering, after molten water, these bonding agglomerates form that center does not get wet, solid skin wraps up the bonding shape thing that one deck is water-swellable, no longer be dissolved into the aqueous solution, be commonly called as " flake " and cause a large amount of waste of medicament and the dirt of equipment pipeline to block up, severe patient affects production run.
In order to avoid adding the drawback that inorganic assistant agent brings, some research trends are in adding organic additive to improve the comprehensive use properties of polyacrylamide flocculant in finished product polyacrylamide.In " a kind of instant polyacrylamide flocculant " of publication number CN101746864A, following weight proportion is adopted to form: polyacrylamide 1.0 parts; Compound alcohol dispersion agent 3.0-7.0 part; Anti degradant 0.2-0.9 part; Frostproofer 50-200 part.This invention is by with the addition of compound alcohol auxiliary agent, polyacrylamide is water-soluble but be insoluble to compound alcohol, the two mixes and makes polyacrylamide particle surface superscribe compound alcohol film, make polyacrylamide particle disperse adhesion, thus fully disperse when enabling polyacrylamide water-soluble, do not formed " flake ", this patent is equivalent to isolate between polyacrylamide particle with physics mode, make it be uniformly dissolved, but do not have significant promoter action to dissolution rate, solubilization-aid effect is limited.
Publication number is the effect that " flocculation agent " of CN101497468A reaches accelerate dissolution by adding exsiccated ammonium alum, aluminium sodium sulfate, polyacrylamide and natural organic acids (citric acid, lactic acid or iron lactate) and remove COD.This formula feature is organic composition (polyacrylamide) content low (8%-15%), so have some superiority in dissolution rate, exsiccated ammonium alum has certain use to reduction COD simultaneously.But still have problem to be solved: this formula due to polyacrylamide amine content very low, when processing unit vol sewage, dosage can be higher, several organic acid simultaneously contained and inorganic salt, after hydrolysis, acidity is stronger, be unfavorable for the process to coal washing waste water, aluminium element in medicament finally can become floc sedimentation precipitation, increases sludge output.
For prior art Problems existing, be badly in need of the novel Instant flocculation agent of research and development, based on polyacrylamide flocculant, by several auxiliary agent with the use of, significantly improve the dissolution rate of high polymer polyacrylamide flocculation agent, performance and the result of use of flocculation agent can not be reduced simultaneously; By adjusting auxiliary agent proportioning flexibly, the flocculation rate of arbitrarily adjustment Instant flocculation agent can be needed according to scene; The simple environmental protection of production process, energy consumption is low, non-secondary pollution; Auxiliary agent is nontoxic, and consumption is few, and flocculation agent comprehensive cost is low.
Summary of the invention
The object of the invention is to provide a kind of Instant flocculation agent for wastewater treatment, particularly a kind of Instant flocculation agent and preparation method thereof being mainly used in coal washing, ore dressing field wastewater treatment.
Instant flocculation agent and preparation method thereof, it can improve dissolution rate on the basis ensureing water treatment efficiency and dosage.
The technical solution adopted in the present invention is: this Instant flocculation agent includes polyacrylamide, solubility promoter and promotor, it is characterized in that: described polyacrylamide is anion-polyacrylamide, solubility promoter is polycarboxylic acid and unary carboxylation, promotor are weak acid sodium salt, described raw material dry weight is than being anion type Ju Bing Xi Xian An ︰ Duo unit Suo Suan ︰ monocarboxylic acid Yan ︰ weak acid sodium salt=5 ~ 9 ︰ 0.1 ~ 3 ︰ 0.5 ~ 4 ︰ 0.1 ~ 3.Its preparation method is sequentially added in reactor by anion-polyacrylamide, polycarboxylic acid, unary carboxylation, weak acid sodium salt respectively, at 10 ~ 50 DEG C of temperature, pass through dispersed with stirring, complex reaction 0.5 ~ 3 hour, obtained molecular weight is between 5,000,000-2,300 ten thousand, degree of hydrolysis is between 10%-40%, and raw material dry weight effective content is more than 88%, and dissolution time is the Instant flocculation agent of 15min ~ 40min.
Described polycarboxylic acid is at least one in oxalic acid, dicarboxyl succinic acid, succinic acid, 2-hydroxy propane-1,2,3-tricarboxylic acid, toxilic acid, oxysuccinic acid, propanedioic acid.
Described unary carboxylation is at least one in sodium formiate, ammonium formiate, sodium acetate, potassium acetate.
Described weak acid sodium salt is at least one in Sodium Tetraborate, sodium carbonate, sodium bicarbonate, sodium phosphate.
The advantage that the present invention has and positively effect are: the present invention by adding solubility promoter unary carboxylation and polycarboxylic acid and promotor weak acid sodium salt, from promoting that PAM molecular chain is swelling, the angle of stretching, extension improves the dissolution rate of negatively charged ion PAM.The solution principle of polyacrylamide be dish knot long molecular chain together in water due to the electrostatic repulsion between electronegative functional group thus swelling, stretch gradually, finally reach dissolved state, become solution.The swelling rate of stretch accelerating molecular chain improves the key of PAM dissolution rate.Due to coal washing, ore dressing flocculation agent normally anionic polyacrylamide, functional group on molecular chain is mostly carboxylic group, ionize in water or be hydrolyzed electronegative, so consider to add in additive containing the small molecules unary carboxylation of same functional group and polycarboxylic acid as solubility promoter, due to " similar mix ", solubility promoter can infiltrate in the hole of macromolecular chain fast, the hydrogen bond be combined into water breaking polyacrylamide long-chain inside, and the large radius negative charge group that can be generated by ionization carrys out the stretching, extension of acceleration molecular chain by Charge repulsion, swelling, in ionization dissolution process, in water, produce certain density carboxylic acid ion similar to functional group on molecular chain simultaneously, mutually repelled by interparticle Van der Waals force, the swelling rate of further quickening polymeric flocculant molecular chain.Use weak acid sodium salt to be used as the effect that promotor carrys out auxiliary solubility promoter, polycarboxylic acid is mostly weak acid, and in water, ionization rate is slow, so utilize the water-disintegrable ionization rate promoting Multiple Weak Acid of weak acid sodium salt, can play a role more fast.
Detailed hydrotropy process is as follows: high molecular polymer dissolving is in a solvent different with the dissolution process of common molecular.Because solute is polymer, the magnetism between self-molecules present is large more than common molecular, and when they put in solvent, polymer can not diffuse in solvent molecule rapidly.On the contrary, be that the small molecules of solvent penetrates in the hole of Polymer coils, but because of the winding of segment, small molecules can not infiltrate hole immediately, and they are just adsorbed on chain, and macromolecular volume is swollen rapidly, and this process becomes swelling process.Polyacrylamide is that molecular chain height is wound around the solid particulate tightened, after contacting with water be first contact water surperficial time, water molecules infiltrates in the hole of polyacrylamide molecular surface, because polyacrylamide amine molecule meets water power from the carboxylate group gone out with negative charge, cause loosening with tentatively swelling of molecular chain.Along with the preliminary expansion in hole, the carboxylate radical that unary carboxylation's molecular ionization goes out also penetrates in the hole of polyacrylamide Polymer coils rapidly, is adsorbed on macromolecular chain, and the repulsive interaction destroyed between carboxyl promotes that molecular chain stretches further.Along with the further increase in macromolecular chain hole, the macromole polycarboxylic acid in compound also can penetrate in the hole of polymer group gradually.Now along with molecular chain gap constantly increases, distance between carboxyl is also more and more far away, the repulsive interaction that micromolecular unary carboxylation plays has become small, after polycarboxylic acid enters, due on polycarboxylic acid with multiple carboxyl and oh group thus the repulsive interaction that can strengthen further with electric charge on molecular chain, from molecule solvent swelling state further to dissolved state, due to sterically hindered effect, simultaneously also in conjunction with the hydroxide ion that a part of monocarboxylic acid salt hydrolysis generates, balance the acid or alkali environment in system.In compound, the effect of weak acid sodium salt is mainly divided into 3 points, first because polycarboxylic acid is weak acid, ionization in water is slow and degree of ionization is low, the hydroxide ion of the hydrolysis generation of weak acid sodium salt significantly can promote the ionization of polycarboxylic acid, be that in water, carboxylate radical concentration increases, greatly add polycarboxylic acid to the promoter action of dissolving.Secondly monocarboxylic acid sodium places volatilization of gasifying in atmosphere, and weak acid sodium salt effectively can adsorb the molecular acid of gaseous state, avoids the minimizing of carboxylic acid ion, and the 3rd is the pungent odour reducing compound while preventing from sending out.
Advantage of the present invention:
1. additive dosage is adjustable flexibly, arbitrarily can adjust the dissolution rate of polyacrylamide flocculant as required, can adapt to the waste water that water body is changeable.
2. pair any anionic polyacrylamide flocculation agent, no matter dissolution rate fast or slow, all have solubilization-aid effect, improve solute effect at least 30%.
3. addition is few, and cost is low, can not affect medicament usage quantity in process of production.
4. non-secondary pollution, water ions content is low, and most of ion is used for flocculation, can not remain in parting liquid, water quality can not be made to degenerate, and can not corrode pipeline thus cause industrial accident or personnel safety to threaten.
5. the simple environmental protection of production technique, energy consumption is little, and efficiency is high, workable.
6. auxiliary agent can not make flocculating effect be deteriorated, and has auxiliary flocculating effect in some cases, ensures the high efficiency of medicament.
extremely long-pending compliance test result
With reference to the method decision set compound of description in patent publication No. CN101769870A " visual chromatism method judges the dissolution degree of anion-polyacrylamide in water " on the impact of polyacrylamide dissolution rate: add 3g anhydrous CuSO4 in 100mL water, stir be configured to 3% blue lysate.Get degree of hydrolysis 15%, the anionic polyacrylamide 0.06g of molecular weight 1,600 ten thousand is major ingredient, adds different auxiliary agent and mixes, and formula refers to table 1, and gross weight is 0.1g, adds 100mL lysate and is configured to 1 ‰ solution.(formula 8# is blank sample, and do not add auxiliary agent, major ingredient weight is all 0.6g mutually with other samples, to contrast, adds the solution that 100mL lysate is configured to 0.6 ‰.) respectively filling a prescription all is configured to 100mL with 3% copper sulphate dissolves liquid, observe the dissolved state of compound particle in blue lysate, be non-dissolved state when compound particle is completely transparent in coloured solvent, be solvent swelling state when granule interior starts staining conditions occurs, dyeing to being scattered in solvent is completely dissolved state.
table 1: Instant flocculation agent each auxiliary agent solubilization-aid effect contrast table:
Show that dissolution rate is by table 1: fill a prescription 1#> formula 7#> formula 5#> formula 4#> formula 3#> formula 2#> formula 8#> formula 6#, and draw the following conclusions: three kinds of auxiliary agents add simultaneously and have synergy, can reach maximum to the promoter action of dissolving, independent interpolation polycarboxylic acid is substantially identical with independent unary carboxylation's effect of adding, reason is that two kinds of material mechanisms of action are similar, all accelerate dissolution rate by electrostatic repulsion, and unary carboxylation due to molecule less, can infiltrate through faster in polymeric flocculant molecular chain, effect is relatively obvious, and weak acid sodium salt act as adjustment adds pH value after solubility promoter (polycarboxylic acid, unary carboxylation), the words added separately can make whole dispersion system meta-alkalescence, the swelling stretching, extension of meeting Inhibitory molecules chain, add with other two kinds of solubility promoters simultaneously, hydrolysis due to weak acid sodium salt can promote the ionization of polycarboxylic acid, so the synergy of three kinds of materials can be made to maximize.
Embodiment
The following preparation method describing Instant flocculation agent of the present invention according to embodiment in detail.
The concrete operation step of preparation Instant flocculation agent is as follows: be sequentially added in reactor by anion-polyacrylamide, polycarboxylic acid, unary carboxylation, weak acid sodium salt respectively, at 10 ~ 50 DEG C of temperature, pass through dispersed with stirring, complex reaction 0.5 ~ 3 hour, obtained molecular weight is between 5,000,000 ~ 2,300 ten thousand, degree of hydrolysis is between 10%-40%, and raw material dry weight effective content is more than 88%, the Instant flocculation agent of dissolution time 15 ~ 40min.
Embodiment 1:
By molecular weight 1,800 ten thousand, the anionic polyacrylamide of degree of hydrolysis 15%, dyhydrobutanedioic acid, sodium formiate, Sodium Tetraborate are put in reactor in order, and this raw material dosage dry weight is than being anion type Ju Bing Xi Xian An ︰ dihydroxy Ding bis-Suan ︰ Jia Suan Na ︰ Sodium Tetraborate=5 ~ 8 ︰ 0.5 ~ 1.5 ︰ 1 ~ 2 ︰ 0.5 ~ 1.5.At 10 DEG C of temperature, by dispersed with stirring, complex reaction 0.5 hour, obtained molecular weight is between 9,000,000-1,500 ten thousand, and degree of hydrolysis is between 15%, and raw material dry weight effective content is more than 88%, the Instant flocculation agent of dissolution time 18 ~ 35min.
Carrying out contrast dissolution rate according to the blank sample that above-mentioned formula is consistent with weight of selecting materials with the instant formula compound prepared by preparation method tests as follows:
Embodiment 2
By molecular weight 1,000 ten thousand, the anionic polyacrylamide of degree of hydrolysis 10%, oxalic acid, ammonium formiate, sodium carbonate are put in reactor in order, and this raw material dosage dry weight is than being anion type Ju Bing Xi Xian An ︰ Yi bis-Suan ︰ formic acid An ︰ sodium carbonate=5 ~ 9 ︰ 0.1 ~ 1 ︰ 0.5 ~ 4 ︰ 0.1 ~ 0.9.At 50 DEG C of temperature, by dispersed with stirring, complex reaction 1 hour, obtained molecular weight is between 5,000,000-900 ten thousand, and degree of hydrolysis is 10%, and raw material dry weight effective content is more than 88%, the Instant flocculation agent of dissolution time 15 ~ 40min.
Carrying out contrast dissolution rate according to the blank sample that above-mentioned formula is consistent with weight of selecting materials with the instant formula compound prepared by preparation method tests as follows:
Embodiment 3
By molecular weight 2,500 ten thousand, the anionic polyacrylamide of degree of hydrolysis 40%, succinic acid, sodium acetate, sodium bicarbonate are put in reactor in order, and this raw material dosage dry weight is than being anion type Ju Bing Xi Xian An ︰ Ding bis-Suan ︰ Yi Suan Na ︰ sodium bicarbonate=5 ~ 8.5 ︰ 1.4 ~ 3 ︰ 0.5 ~ 1 ︰ 0.1 ~ 3.At 30 DEG C of temperature, by dispersed with stirring, complex reaction 3 hours, obtained molecular weight is between 1,200 ten thousand-2,100 ten thousand, and degree of hydrolysis is 40%, and raw material dry weight effective content is more than 88%, the Instant flocculation agent of dissolution time 15 ~ 30min.
Carrying out contrast dissolution rate according to the blank sample that above-mentioned formula is consistent with weight of selecting materials with the instant formula compound prepared by preparation method tests as follows:
Embodiment 4
By molecular weight 1,800 ten thousand, the anionic polyacrylamide of degree of hydrolysis 25%, 2-hydroxy propane-1,2,3-tricarboxylic acid, potassium acetate, sodium phosphate are put in reactor in order, this raw material dosage dry weight is than being anion type Ju Bing Xi Xian An ︰ 2-hydroxy propane-1,2,3-tri-Suo Suan ︰ Yi Suan Jia ︰ sodium phosphate=5 ~ 8 ︰ 1 ~ 1.5 ︰ 1 ~ 3 ︰ 0.3 ~ 1.At 20 DEG C of temperature, by dispersed with stirring, complex reaction 2 hours, obtained molecular weight is between 9,000,000-1,440 ten thousand, and degree of hydrolysis is 25%, and raw material dry weight effective content is more than 88%, the Instant flocculation agent of dissolution time 20 ~ 35min.
Carrying out contrast dissolution rate according to the blank sample that above-mentioned formula is consistent with weight of selecting materials with the instant formula compound prepared by preparation method tests as follows:
Embodiment 5
By molecular weight 2,200 ten thousand, the anionic polyacrylamide of degree of hydrolysis 35%, toxilic acid, potassium acetate, sodium bicarbonate are put in reactor in order, and this raw material dosage dry weight is than being anion type Ju Bing Xi Xian An ︰ Ma Lai Suan ︰ Yi Suan Jia ︰ sodium bicarbonate=5 ~ 9 ︰ 0.1 ~ 1 ︰ 0.5 ~ 4 ︰ 0.1 ~ 0.9.At 40 DEG C of temperature, by dispersed with stirring, complex reaction 2.5 hours, obtained molecular weight is between 1,100 ten thousand-1,800 ten thousand, and degree of hydrolysis is 35%, and raw material dry weight effective content is more than 88%, the Instant flocculation agent of dissolution time 15 ~ 30min.
Carrying out contrast dissolution rate according to the blank sample that above-mentioned formula is consistent with weight of selecting materials with the instant formula compound prepared by preparation method tests as follows:
Embodiment 6
By molecular weight 2,000 ten thousand, the anionic polyacrylamide of degree of hydrolysis 30%, oxysuccinic acid, sodium formiate, Sodium Tetraborate are put in reactor in order, and this raw material dosage dry weight is than being anion type Ju Bing Xi Xian An ︰ Ping Guo Suan ︰ Jia Suan Na ︰ Sodium Tetraborate=5 ~ 8.5 ︰ 1.4 ~ 3 ︰ 0.5 ~ 1 ︰ 0.1 ~ 3.At 25 DEG C of temperature, by dispersed with stirring, complex reaction 1.5 hours, obtained molecular weight is between 1,000 ten thousand-1,800 ten thousand, and degree of hydrolysis is 30%, and raw material dry weight effective content is more than 88%, the Instant flocculation agent of dissolution time 15 ~ 30min.
Carrying out contrast dissolution rate according to the blank sample that above-mentioned formula is consistent with weight of selecting materials with the instant formula compound prepared by preparation method tests as follows:
Embodiment 7:
By molecular weight 1,600 ten thousand, the anionic polyacrylamide of degree of hydrolysis 20%, propanedioic acid, sodium formiate, sodium carbonate are put in reactor in order, and this raw material dosage dry weight is than being anion type Ju Bing Xi Xian An ︰ Bing bis-Suan ︰ Jia Suan Na ︰ sodium carbonate=5 ~ 8 ︰ 0.5 ~ 1.5 ︰ 1 ~ 2 ︰ 0.5 ~ 1.5.At 35 DEG C of temperature, by dispersed with stirring, complex reaction 2.5 hours, obtained molecular weight is between 8,000,000-1,500 ten thousand, and degree of hydrolysis is between 15%, and raw material dry weight effective content is more than 88%, the Instant flocculation agent of dissolution time 20 ~ 40min.
Carrying out contrast dissolution rate according to the blank sample that above-mentioned formula is consistent with weight of selecting materials with the instant formula compound prepared by preparation method tests as follows:
According to above-mentioned contrast dissolution experiment, under the prerequisite that anionic polyacrylamide weight is consistent, instant formula dissolution rate of the present invention is obviously better than blank sample.
It is as follows that instant formula compound prepared by above-mentioned formula and preparation method carries out flocculating effect experiment:
Embodiment 8: for dissimilar waste water, the experiment that Instant flocculation agent affects flocculating effect
Get dissimilar waste water, flocculation treatment is carried out respectively with plain polypropylene acid amides flocculation agent and Instant flocculation agent, various formula is all configured to 100mL solution with deionized water, measures the transmittance of its 700nm wavelength, floc settlement height, settling time data, compares flocculating effect.See the following form:
| Waste water type | Blank | Settling time (s) | Settling height (mm) | Transmittance (%) | Instant | Settling time (s) | Settling height (mm) | Transmittance (%) |
| Coal washing waste water | PAM0.06g | 5 | 25 | 66 | PAM0.06g oxalic acid 0.02g sodium formiate 0.02g Sodium Tetraborate 0.01g | 4 | 22 | 69 |
| Coal mining waste water | PAM0.06g | 7 | 28 | 62 | PAM0.06g dicarboxyl succinic acid 0.02g ammonium formiate 0.02g sodium bicarbonate 0.01g | 7 | 19 | 67 |
| Iron Works Plant's waste water | PAM0.06g | 4 | 12 | 67 | PAM0.06g succinic acid 0.02g sodium acetate 0.02g sodium bicarbonate 0.01g | 3 | 10 | 71 |
| Iron ore mine waste water | PAM0.06g | 3 | 16 | 72 | PAM0.06g 2-hydroxy propane-1,2,3-tricarboxylic acid 0.02g sodium formiate 0.02g sodium bicarbonate 0.01g | 3 | 16 | 77 |
| Fluorite ore waste water | PAM0.06g | 4 | 17 | 61 | PAM0.06g toxilic acid 0.02g sodium acetate 0.02g sodium carbonate 0.01g | 3 | 13 | 64 |
| Gold mine waste | PAM0.06g | 5 | 11 | 52 | PAM0.06g oxysuccinic acid 0.02g potassium acetate 0.02g Sodium Tetraborate 0.01g | 5 | 8 | 56 |
| Power plant effluent | PAM0.06g | 12 | 9 | 39 | PAM0.06g propanedioic acid 0.02g ammonium formiate 0.02g sodium phosphate 0.01g | 10 | 7 | 43 |
Shown by above experimental result, no matter in settling velocity, parting liquid clarity and form flocs unit height aspect, the flocculating effect of instant flocculant formula is not all worse than plain polypropylene acid amides flocculation agent, in some cases, effect is even better than plain polypropylene acid amides flocculation agent.
Comprehensively above-mentionedly can find out, the dissolution rate of Instant flocculation agent of the present invention is obviously better than existing polyacrylamide flocculant, and meanwhile, flocculating effect is not worse than existing polyacrylamide flocculant, achieves object of the present invention.
Claims (4)
1. an Instant flocculation agent, it includes polyacrylamide, solubility promoter and promotor, it is characterized in that: described polyacrylamide is anion-polyacrylamide, solubility promoter is polycarboxylic acid and unary carboxylation, promotor is weak acid sodium salt, raw material dry weight is than being anion type Ju Bing Xi Xian An ︰ Duo unit Suo Suan ︰ monocarboxylic acid Yan ︰ weak acid sodium salt=5 ~ 9 ︰ 0.1 ~ 3 ︰ 0.5 ~ 4 ︰ 0.1 ~ 3, described polycarboxylic acid is oxalic acid, dicarboxyl succinic acid, succinic acid, 2-hydroxy propane-1, 2, 3-tricarboxylic acid, toxilic acid, oxysuccinic acid, one in propanedioic acid, described unary carboxylation is sodium formiate, ammonium formiate, sodium acetate, at least one in potassium acetate.
2. Instant flocculation agent according to claim 1, is characterized in that: described weak acid sodium salt is at least one in Sodium Tetraborate, sodium carbonate, sodium bicarbonate, sodium phosphate.
3. the preparation method of an Instant flocculation agent, it is characterized in that: raw material dry weight is than being anion type Ju Bing Xi Xian An ︰ Duo unit Suo Suan ︰ monocarboxylic acid Yan ︰ weak acid sodium salt=5 ~ 9 ︰ 0.1 ~ 3 ︰ 0.5 ~ 4 ︰ 0.1 ~ 3, respectively by anion-polyacrylamide, polycarboxylic acid, unary carboxylation, weak acid sodium salt is sequentially added in reactor, at 10 ~ 50 DEG C of temperature, pass through dispersed with stirring, complex reaction 0.5 ~ 3 hour, obtained molecular weight is between 5,000,000 ~ 2,300 ten thousand, degree of hydrolysis is between 10%-40%, raw material dry weight effective content is more than 88%, the Instant flocculation agent of dissolution time 15 ~ 40min, described polycarboxylic acid is oxalic acid, dicarboxyl succinic acid, succinic acid, 2-hydroxy propane-1, 2, 3-tricarboxylic acid, toxilic acid, oxysuccinic acid, at least one in propanedioic acid, described unary carboxylation is sodium formiate, ammonium formiate, sodium acetate, at least one in potassium acetate.
4. the preparation method of Instant flocculation agent according to claim 3, is characterized in that: described weak acid sodium salt is at least one in Sodium Tetraborate, sodium carbonate, sodium bicarbonate, sodium phosphate.
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| CN107265598A (en) * | 2016-04-07 | 2017-10-20 | 上海永泉化工科技有限公司 | A kind of Compound waterborne paint sewage flocculant and its production method |
| CN110386651B (en) * | 2018-04-20 | 2022-06-28 | 上海四奥化工有限公司 | Polyacrylamide flocculant for tailings and preparation method thereof |
| CN110627139A (en) * | 2018-06-23 | 2019-12-31 | 威海翔泽新材料科技有限公司 | Sewage modifier and method for removing COD (chemical oxygen demand) and ammonia nitrogen in wastewater thereof |
| CN111302409A (en) * | 2018-12-12 | 2020-06-19 | 内蒙古信尚环保科技有限公司 | Sewage phosphorus removal agent, preparation method and application thereof |
| CN110436597B (en) * | 2019-08-05 | 2022-04-12 | 江西师范大学 | Preparation method of low-viscosity, instant and efficient flocculation decolorizing agent |
| CN113171882A (en) * | 2021-04-21 | 2021-07-27 | 中国矿业大学 | Method for improving dewatering performance of flotation clean coal |
| CN113860446A (en) * | 2021-09-16 | 2021-12-31 | 中建西部建设新疆有限公司 | Flocculating agent for sandstone aggregate and preparation method thereof |
| CN114213582B (en) * | 2022-02-21 | 2022-09-27 | 河南博源新材料有限公司 | Multi-site branched anionic polyacrylamide and application thereof |
| CN116970122B (en) * | 2023-09-21 | 2023-12-22 | 河南博源新材料有限公司 | Instant polyacrylamide and preparation method thereof |
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