CN105366790B - A kind of biological polyoses base decolorization flocculation agent and preparation method thereof - Google Patents
A kind of biological polyoses base decolorization flocculation agent and preparation method thereof Download PDFInfo
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- CN105366790B CN105366790B CN201510801039.8A CN201510801039A CN105366790B CN 105366790 B CN105366790 B CN 105366790B CN 201510801039 A CN201510801039 A CN 201510801039A CN 105366790 B CN105366790 B CN 105366790B
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Abstract
The present invention relates to a kind of biological polyoses base decolorization flocculation agent and preparation method thereof; there are the biological polyoses of 2,000,000 3,000 ten thousand super high molecular weights and non-toxic degradable as basic framework using large-scale production; by the way that graft copolymerization occurs with the dicyandiamide formaldehydes cationic polycondensation thing of end carbon-carbon double bonds, prepare with super high molecular weight and have decoloration and the biological polyoses base decolorization flocculation agent of flocculating function concurrently.This product is applicable to the water quality treatment big dyeing waste water of change and acidproof heat-proof better performances, can make CODcr removal rates in water up to more than 80%, and percent of decolourization is up to more than 93%.Extensive market prospects and good economic results in society are had more than acrylic amide, the agent of natural macromolecular material class decolorization flocculation.
Description
Technical field
The invention belongs to polysaccharide bioflocculant modified technique technical field, particularly a kind of biological polyoses base decolorization flocculation
Agent and preparation method thereof.
Background technology
At present, the processing to dyeing waste water uses dicandiamide-formaldehyde class decolorization flocculation agent and cation polypropylene acyl mostly
Amine decolorization flocculation agent, the former decoloration performance is excellent, but molecular weight is relatively low, and adsorption bridging and the effect of net benefit are weaker, cause shape
Into flco it is smaller and sinking speed is slow, and the latter is then exactly with the former on the contrary, flocculating property is good, but decoloration performance is poor.
To reach while decolourizing and flocculated purpose, the prior art is by polyacrylamide flocculant and dicandiamide-formaldehyde
Class decolorising agent combines, and has prepared new decolorization flocculation agent, as patent CN103304744A reports a kind of aqueous two-phase decoloration
The preparation process of flocculation agent emulsion.In addition, the research for decolorization flocculation agent is put forth effort on to dicandiamide-formaldehyde condensation polymer
Improve and provided for the condensation polymer selection of grafting skeleton or the material of compounding, it is therefore an objective to reduce toxicity, more environmentally-friendly and raising
Performance, such as the improvement of dicandiamide-formaldehyde condensation polymer.Formaldehyde is all substituted for glyoxal by the part prior art, and part is existing
Formaldehyde fraction is substituted for urea etc. by technology, and being grafted skeleton then has starch, cellulose, lignin, chitosan etc., such as patent
CN102863065A reports a kind of preparation side of the Dicyandiamine-formaldehyde condensation product flocculant of starch-grafted end carbon-carbon double bonds
Method.The material of compounding then contains aluminium salt, magnesium salts, molysite and its polymer etc., as patent CN103351454A reports one
Kind prepares the method for modified dicyandiamine formaldehyde Flocculant by adding aluminium chloride.
With attention of the people to environmental protection, the selection of flocculant then more biases toward natural degradable and nontoxic without secondary dirt
The material of dye, such as：Starch, cellulose, guar gum etc..But these materials all deposit when in use its in molecular weight and structural behaviour
On the problems such as being still difficult to meet actual needs.
The content of the invention
For overcome the deficiencies in the prior art, the present invention using it is artificial synthesized and large-scale production have 2,000,000-
The biological polyoses of 30000000 super high molecular weights and non-toxic degradable are basic framework, by contracting with dicandiamide-formaldehyde cationoid
Graft copolymerization occurs for polymers, prepares with super high molecular weight and has decoloration and the biological polyoses base decoloration of flocculating function concurrently
Flocculant.
The technical solution adopted by the present invention to solve the technical problems is：
Present invention firstly provides a kind of biological polyoses base decolorization flocculation agent, it is with non-ionic biological polyoses solution and self-control
Dicandiamide-formaldehyde condensation polymer be raw material, be made with super high molecular weight biological polyoses base decolorization flocculation agent, its skeleton symbol
For：Dex-O-An-O-Dex, wherein, n >=2, A are dicandiamide-formaldehyde condensation polymer, its skeleton symbol is：
Dex is biological polyoses, and the skeleton symbol of its key structural elements is：
The present invention also provides a kind of preparation method of above-mentioned biological polyoses base decolorization flocculation agent, comprise the following steps：
Step [1] prepares the dicandiamide-formaldehyde condensation polymer that carbon-carbon double bond is contained in end, its method is：Equipped with electric mixing
In the four-hole boiling flask for mixing device, thermometer, reflux condensing tube, dicyandiamide, urea, acrylamide, catalyst, formaldehyde are sequentially added,
Bath temperature is controlled at 35-60 DEG C, starts stirring, adds ethylenediamine until completely dissolved, and reaction system starts heat release, stops adding
Heat, when question response system temperature is down to 50 ± 2 DEG C, is slowly added dropwise remaining formaldehyde, then heats to 66-68 DEG C, keeps the temperature 2h,
Obtain product；Wherein, the molar ratio of urea and ethylenediamine is 1:1, the molar ratio of urea and total formaldehyde is 1:8~1:10, dicyandiamide
Molar ratio with total formaldehyde is 1:1~1:3, the molar ratio of catalyst and dicyandiamide is 1:1~2:1, acrylamide and dicyandiamide
Molar ratio be 1:1~1:2, remaining formaldehyde accounts for the 30-40% of total formaldehyde quality.
Step [2] exists the non-ionic biological polyoses that molecular weight is 2,000,000-3,000 ten thousand with dicandiamide-formaldehyde condensation polymer
In aqueous solution polysaccharide bio-based decolorization flocculation agent is formed through the copolyreaction of free radical initiation grafting：End made from previous step is contained
The dicandiamide-formaldehyde condensation polymer for having carbon-carbon double bond is made into 50% solution, is added in three-necked flask, then adds mass concentration
For the non-ionic biological polyoses solution of 5-20%, stirring is started, and is to slowly warm up to 40-60 DEG C, after leading to nitrogen 30min, is added
Enter initiator, and speed of agitator control is stopped into stirring after 100-200r/min, stirring 15min, keep the temperature 3-5h, be cooled to
Room temperature is up to final product.
Preferably, the preparation method of the non-ionic biological polyoses is：Portugal is added into certain density sucrose solution
The activator of glycan invertase, then adjusts the pH value of the solution, adds dextransucrase solution afterwards, adjusts perseverance after pH again
Temperature stirring reaction a period of time, obtains after heat sterilization after reaction product, filtering, removal of impurities, purifying concentration up to final products, tool
Preparation is as follows：
The preferable dynamic viscosity of non-ionic biological polyoses is respectively 4500cPs, 11250cPs and 65000cPs, is wrapped
Include following making step：
(1) according to the requirement of above-mentioned polysaccharide bioflocculant dynamic viscosity, respectively correspondingly compound concentration is 0.80mol/
L, 1000 milliliters, 5000 milliliters and 1000 liters of the sucrose solution of 0.73mol/L and 0.44mol/L；
(2) calcium chloride solution is separately added into above-mentioned sucrose solution, wherein concentration is 0.80mol/L and 0.73mol/L
Solution in be separately added into 0.5% 10 milliliters and 50 milliliters of calcium chloride solution；Concentration is 0.58mol/L's and 0.44mol/L
5% 100 milliliters and 1000 milliliters of calcium chloride solution is separately added into solution；
(3) pH value of above-mentioned sucrose solution is adjusted in 5.2~5.4 scopes with 30% hac buffer；
(4) 17.5 milliliters of dextransucrase solution, 109.6 milliliters, 2500 millis are separately added into above-mentioned sucrose solution
Rise and 29.2 liters, the activity of enzyme is respectively 456IU/ml, 456IU/ml and 480IU/ml, after mixing, with 10% vinegar acid for adjusting pH
Value is in 5.2~5.4 scopes；
(5) above-mentioned solution is placed in water bath with thermostatic control, adjusts stirring, fully reaction until solution reaches required power
Viscosity, the corresponding water bath with thermostatic control temperature point of solution of above-mentioned tetra- kinds of various concentrations of 0.80mol/L, 0.73mol/L and 0.44mol/L
Wei not be 20~22 DEG C, 22~24 DEG C, 24~26 DEG C；
(6) heat sterilization is carried out to reaction product, filtering and impurity removing is more up to the non-ionic biology after purifying concentration
Sugar.
Preferably, the catalyst is any one in ammonium chloride, ammonium sulfate, ammonium hydrogen carbonate, hydrochloric acid.
Preferably, the solid masses ratio of the dicandiamide-formaldehyde condensation polymer and polysaccharide biology is 1:1~3:1.
Preferably, the initiator is that ammonium persulfate/sodium hydrogensulfite, azo diisobutyl amidine hydrochloride and azo two are different
One kind in Butamisole quinoline hydrochloride, the wherein molar ratio of ammonium persulfate and sodium hydrogensulfite are 1:1~4:1.
Preferably, the dosage of the initiator accounts for non-ionic polysaccharide biological flocculant and dicandiamide-formaldehyde condensation polymer
The 0.1-5 ‰ of both total solid quality.
The notable good effect of the present invention：
The dicandiamide-formaldehyde condensation polymer with decoloration is grafted to the biology with super high molecular weight by the present invention first
On polysaccharide, prepare with the dual-use function that decolourizes and flocculate in the biological polyoses base decolorization flocculation agent of one.Product of the present invention with
Similar product is compared, and has the molecular weight of superelevation and higher molecule chain rigidity, is given up suitable for the printing and dyeing of water quality treatment change greatly
Water and acidproof heat-proof better performances, can make CODcr removal rates in water up to more than 80%, and percent of decolourization is up to more than 93%.The product
Because the super high molecular weight of biological polyoses and degradable, nontoxic, non-secondary pollution characteristic cause product than acrylic amide, naturally
The agent of high molecular material class decolorization flocculation has more extensive market prospects and good economic results in society.
Embodiment
Below to a preferred embodiment of the present invention will be described in detail.
Embodiment 1
Prepare the dicandiamide-formaldehyde condensation polymer solution of end carbon-carbon double bonds：Equipped with electric mixer, thermometer, return
In the four-hole boiling flask for flowing condenser pipe, 63g dicyandiamides, 11.25g urea, 53.25g acrylamides, 40.13g chlorinations are sequentially added
The formalin of ammonium, 81.08g37%, bath temperature control at 35-45 DEG C, start stirring, add 11.25g until completely dissolved
Ethylenediamine, reaction system start heat release, stop heating, when question response system temperature is down to 48 DEG C, 40.54g concentration is slowly added dropwise
For 37% formalin, 66-68 DEG C is then heated to, keeps the temperature 2h, takes out, cools down to obtain product.
By above-mentioned product dilution into 50% aqueous solution, take 50g solution to add in 500ml three-necked flasks, then add
170g mass concentrations are 15% biological polyoses solution, start stirring, and are to slowly warm up to 45 DEG C, after leading to nitrogen 30min, are added
The two isobutyl imidazoline hydrochloride 3ml of azo of 0.1mol/L, it is 110-130r/min to control rotating speed, after stirring 15min, stops stirring
Mix, keep the temperature 3h, be cooled to room temperature up to final product.
Embodiment 2
Prepare the dicandiamide-formaldehyde condensation polymer solution of end carbon-carbon double bonds：Equipped with electric mixer, thermometer, return
In the four-hole boiling flask for flowing condenser pipe, 69g dicyandiamides, 12.33g urea, 58.32g acrylamides, 26.39g chlorinations are sequentially added
The formalin of ammonium, 100g37%, bath temperature are controlled at 45-50 DEG C, start stirring, add 12.33g second until completely dissolved
Diamines, reaction system start heat release, stop heating, when question response system temperature is down to 50 DEG C, 66.67g concentration, which is slowly added dropwise, is
37% formalin, then heats to 66-68 DEG C, keeps the temperature 2h, takes out, cools down to obtain product.
By above-mentioned product dilution into 50% aqueous solution, take 60g solution to add in 500ml three-necked flasks, then add
100g mass concentrations are 15% biological polyoses solution, start stirring, and are to slowly warm up to 50 DEG C, after leading to nitrogen 30min, are added
The azo diisobutyl amidine hydrochloride 1.7ml of 0.1mol/L, it is 160-180r/min to control rotating speed, after stirring 15min, is stopped
Stirring, keeps the temperature 3h, is cooled to room temperature up to final product.
Embodiment 3
Prepare the dicandiamide-formaldehyde condensation polymer solution of end carbon-carbon double bonds：Equipped with electric mixer, thermometer, return
In the four-hole boiling flask for flowing condenser pipe, 123.34g dicyandiamides, 15.42g urea, 104.3g acrylamides, 1.47mol are sequentially added
HCl, 100g37% formalin, bath temperature control at 35-45 DEG C, start stirring, add until completely dissolved
15.42g ethylenediamines, reaction system start heat release, stop heating, when question response system temperature is down to 48 DEG C, are slowly added dropwise
66.67g concentration is 37% formalin, then heats to 66-68 DEG C, keeps the temperature 2h, takes out, cools down to obtain product.
By above-mentioned product dilution into 50% aqueous solution, take 20g solution to add in 500ml three-necked flasks, then add
125g mass concentrations are 8% biological polyoses solution, start stirring, and are to slowly warm up to 45 DEG C, after leading to nitrogen 30min, successively
The solution of sodium bisulfite 9.6ml of the ammonium persulfate solution 4.4ml and 0.1mol/L of 0.1mol/L are added, it is 100- to control rotating speed
110r/min, after stirring 15min, stops stirring, keeps the temperature 5h, be cooled to room temperature up to final product.
It is above-described to be merely a preferred embodiment of the present invention, it should be understood that the explanation of above example is simply used
Understand the method and its core concept of the present invention in help, the protection domain being not intended to limit the present invention is all the present invention's
Any modification for being made within thought and principle, equivalent substitution etc., should all be included in the protection scope of the present invention.
Claims (5)
- A kind of 1. preparation method of biological polyoses base decolorization flocculation agent, with non-ionic biological polyoses solution and dicandiamide-formaldehyde The biological polyoses base decolorization flocculation agent with super high molecular weight is made for raw material in condensation polymer, it is characterised in that：Comprise the following steps：Step [1] prepares the dicandiamide-formaldehyde condensation polymer that carbon-carbon double bond is contained in end, its method is：Equipped with electric mixer, Thermometer, reflux condensing tube four-hole boiling flask in, sequentially add dicyandiamide, urea, acrylamide, catalyst, formaldehyde, water-bath temperature Degree control starts stirring at 35-60 DEG C, adds ethylenediamine until completely dissolved, and reaction system starts heat release, stops heating, treats When temperature of reaction system is down to 50 ± 2 DEG C, remaining formaldehyde is slowly added dropwise, then heats to 66-68 DEG C, keeps the temperature 2h, obtains product； Wherein, the molar ratio of urea and ethylenediamine is 1:1, the molar ratio of urea and total formaldehyde is 1:8~1:10, dicyandiamide and total formaldehyde Molar ratio be 1:1~1:3, the molar ratio of catalyst and dicyandiamide is 1:1~2:1, the molar ratio of acrylamide and dicyandiamide For 1:1~1:2, remaining formaldehyde accounts for the 30-40% of total formaldehyde quality；Step [2] by molecular weight be 2,000,000-3,000 ten thousand non-ionic biological polyoses with dicandiamide-formaldehyde condensation polymer water-soluble In liquid biological polyoses base decolorization flocculation agent is formed through the copolyreaction of free radical initiation grafting：Carbon is contained into end made from previous step The dicandiamide-formaldehyde condensation polymer of carbon double bond is made into 50% solution, is added in three-necked flask, and it is 5- then to add mass concentration 20% non-ionic biological polyoses solution, starts stirring, and is to slowly warm up to 40-60 DEG C, and after leading to nitrogen 30min, addition is drawn Agent is sent out, and speed of agitator control is stopped into stirring after 100-200r/min, stirring 15min, 3-5h is kept the temperature, is cooled to room temperature Up to final product；The skeleton symbol of obtained biological polyoses base decolorization flocculation agent is：Dex-O-An-O-Dex, wherein, n >=2, A are double cyanogen Amine-for-aldehyde condensation polymer, its skeleton symbol are：Dex is biological polyoses, and the skeleton symbol of its key structural elements is：
- A kind of 2. preparation method of biological polyoses base decolorization flocculation agent according to claim 1, it is characterised in that：It is described to urge Agent is any one in ammonium chloride, ammonium sulfate, ammonium hydrogen carbonate, hydrochloric acid.
- A kind of 3. preparation method of biological polyoses base decolorization flocculation agent according to claim 1, it is characterised in that：It is described double The solid masses ratio of cyanamide-formaldehyde condensation products and non-ionic biological polyoses is 1:1~3:1.
- A kind of 4. preparation method of biological polyoses base decolorization flocculation agent according to claim 1, it is characterised in that：It is described to draw Hair agent is one in two isobutyl imidazoline hydrochloride of ammonium persulfate/sodium hydrogensulfite, azo diisobutyl amidine hydrochloride and azo Kind, wherein the molar ratio of ammonium persulfate and sodium hydrogensulfite is 1:1~4:1.
- A kind of 5. preparation method of biological polyoses base decolorization flocculation agent according to claim 1, it is characterised in that：It is described to draw The dosage of hair agent accounts for the 0.1-5 ‰ of both non-ionic biological polyoses and dicandiamide-formaldehyde condensation polymer total solid quality.
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| CN106315802A (en) * | 2016-09-19 | 2017-01-11 | 珠海立德环保科技有限公司 | Powder shaped decolorized flocculant and preparation method thereof |
| CN110586044A (en) * | 2019-09-18 | 2019-12-20 | 广东二十四克垃环保科技有限公司 | Salt reduction adsorbent for papermaking production and preparation method and application thereof |
| CN111115782B (en) * | 2020-01-09 | 2022-05-20 | 江西省地质环境监测总站(鄱阳湖生态环境研究所) | Sewage treatment flocculant and preparation method thereof |
| CN112940147B (en) * | 2021-02-04 | 2022-03-04 | 扬州工业职业技术学院 | Modifier and application thereof in preparation of dicyandiamide-formaldehyde resin |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3622533A (en) * | 1967-08-30 | 1971-11-23 | American Cyanamid Co | Polyacrylamide gels containing latent thermal degradation inhibitor |
| CN102863065A (en) * | 2012-09-28 | 2013-01-09 | 青岛科技大学 | Preparation method of starch-grafted dicyandiamide formaldehyde polycondensate flocculants |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3622533A (en) * | 1967-08-30 | 1971-11-23 | American Cyanamid Co | Polyacrylamide gels containing latent thermal degradation inhibitor |
| CN102863065A (en) * | 2012-09-28 | 2013-01-09 | 青岛科技大学 | Preparation method of starch-grafted dicyandiamide formaldehyde polycondensate flocculants |
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Address after: 264200 No. 71 Jiashan Road, Chucun Town, Weihai High-tech Zone, Shandong Province Patentee after: Weihai Hanbang biological environmental protection Polytron Technologies Inc Address before: 264200 No. 71 Jiashan Road, Chucun Town, Weihai High-tech Zone, Shandong Province Patentee before: WEIHAI HANBANG BIOLOGICAL ENVIRONMENTAL PROTECTION SCIENCE & TECHNOLOGY CO., LTD. |
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Denomination of invention: The invention relates to a biological polysaccharide based Decolorizing Flocculant and a preparation method thereof Effective date of registration: 20220516 Granted publication date: 20180427 Pledgee: Weihai City Commercial Bank Limited by Share Ltd. high tech branch Pledgor: Weihai Hanbang biological environmental protection Polytron Technologies Inc. Registration number: Y2022980005577 |
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