47results about How to "Improve adsorption bridging effect" patented technology

The invention discloses a method for preparing chitosan-like efficient flocculant, which comprises the following steps of: (1) pre-treatment of chitosan and derivatives of chitosan: dissolving chitosan and derivatives of chitosan in an acetic acid solution with pH value being 5, uniformly stirring, adding alkali until the pH value is 9 and chitosan separates out, and carrying out suction filtration for later use; (2) preparation of efficient flocculant: adding 1-2 parts of the pre-treated chitosan and derivatives of chitosan, 3-5 parts of cross-linking agents, 1 part of carbamide and 1.5-3 parts of aluminum sulfate in a four-port flask, stirring, pre-reacting for 0.5-1h in a water bath at 60-80 DEG C, then adding 3-8 parts of a dicyandiamide and carbamide mixed modifier, continuing to react for 2-4h, to obtain carbamide-chitosan-dicyandiamide like composite flocculant; and (3) purification of the product: after the reaction, separating out the product by using acetone; carrying out suction filtration; washing the product with ethanol; carrying out suction filtration, and drying in an oven at 90 DEG C for further use.

The invention discloses an aluminum-zinc polysilicate composite flocculating agent and application thereof. Sodium silicate solution and excessive sulfuric acid are mixed with each other to prepare polysilicate solution, zinc sulfate and aluminum sulfate solution, polyacrylamide, calcium hydroxide and sodium hypochlorite are sequentially added into the polysilicate solution, and reaction is carried out to obtain the aluminum-zinc polysilicate composite flocculating agent. The aluminum-zinc polysilicate composite flocculating agent and the application have the advantages that the aluminum-zinc polysilicate composite flocculating agent can be applied to the field of water treatment, accordingly, excellent effects of removing colors, turbidity and carbon can be realized, coagulated floc particles are large, the aluminum-zinc polysilicate composite flocculating agent is high in floc settling velocity, excellent net capturing effects can be realized, and the excellent effects of removing the colors and the turbidity can be realized; raw materials for the aluminum-zinc polysilicate composite flocculating agent can come from wide sources, the aluminum-zinc polysilicate composite flocculating agent is easy to prepare and can be widely applied to the field of wastewater from dyeing and printing and papermaking industries and the like and the field of advanced municipal sewage treatment, and the like.

The invention discloses an organic-inorganic composite flocculant for the use of processing printing and dyeing wastewater and a preparation method and a utilization method thereof. The organic-inorganic composite flocculant takes soluble aluminum salt, ferric salt and corn starch as raw materials, and takes sulfate and calcium hydroxide as reaction auxiliary agent. The specific preparation procedures are that: firstly, a 6-20 percent of starch solution is made of the corn starch, then alkali liquor produced by a mass ratio of 6-15:1 between the starch and the alkali is added slowly and with even pace into the water of 40-90 DEG C and modified for 1-8 hours; then the modified starch solution is added into the aluminum salt and ferric salt solution by a mass ratio of 0.25-1:0.02-0.5:1 between the aluminum, iron and starch, the pH value is adjusted to be 1.0-4.0, and the composite flocculant is acquired after the complex reaction under a temperature condition of 40-90 DEG C for 2-5 hours. The flocculant preparation method of the invention is simple, and is convenient in utilization, with little dosing quantity of the reagents required, high removing rate of CODCr and high decoloration rate, easily biodegradable biodegradation.

The invention relates to an enteromorpha flocculant and a preparation process thereof. The preparation process comprises the following steps that: a raw material enteromorpha is dried and crushed; the enteromorpha and deionized water are mixed according to a mass ratio of 1:70-75, and are stirred and extracted in an 85-90 DEG C constant-temperature water bath for 3-4 hours; and an extract is centrifugally separated, and a supernatant is diluted by adding an equal volume of deionized water to obtain the enteromorpha flocculant. The enteromorpha flocculant is applied to the coagulation treatment of water, so that the turbidity of water can be reduced, and the organic matter in the water can be removed. The enteromorpha flocculant has a simple and quick production process, a wide applicationrange and safety and nontoxicity, and a new way of thinking is provided for the reutilization technology of disaster green algae.

The invention discloses composite polyaluminum silicate chloride and a preparation method thereof, belonging to the technical field of preparation of inorganic composite macromolecular flocculants. The composite polyaluminum silicate chloride is prepared by the steps of curing traditional polymeric aluminium chloride at high temperature and compositing with active silica sol, and has the nano Al30 content between 10% and 40%, wherein the proportion of silicon to aluminum is between 0.02-0.5. The composite polyaluminum silicate chloride can exert the high-efficiency electrical neutralization capability of the Al30 and exert a better flocculation effect due to the enhanced adsorption bridging capability, and is beneficial to broadening of application range of flocculants.

The invention discloses a mineral leaching process of bastnaesite. The mineral leaching process comprises the following steps of: (1) leaching bastnaesite with hydrochloric acid for the first time, and adding a flocculating agent to obtain first leaching residue and first leaching liquid; (2) performing alkaline transfer on the first leaching residue obtained in step (1) by using sodium hydroxide to obtain alkaline transfer residue; (3) leaching the alkaline transfer residue obtained in step (2) by hydrochloric acid for the second time, and adding the flocculating agent to obtain second leaching liquid and second leaching residue; (4) washing the secondary leaching residue obtained in step (3) by using clean water to obtain secondary leaching residue washing water; (5) preparing the flocculating agents used in step (1) and (3) through the secondary leaching residue washing water obtained in step (4); (6) mixing the first leaching liquid obtained in step (1) and the second leaching liquid obtained in step (3); and extracting and separating rare earth. The mineral leaching process is mainly applied to bastnaesite.

The invention discloses a sewage treatment flocculant. The sewage treatment flocculant comprises the following raw materials in parts by weight: 105-115 parts of xylogen, 75-82 parts of propyl aldehyde, 26-29 parts of diethylenetriamine, 35-38 parts of sodium hydroxymethanesulfonate, 580-600 parts of isopropanol, 12-15 parts of 3-chloro-2-hydroxypropyl trimethyl ammonium chloride, 25-28 parts of polymeric aluminum ferric sulfate, 12-15 parts of alum, 23-26 parts of polymeric ferric chlorosulfate and 25-28 parts of polyacrylic acid. The invention further discloses a preparation method of the sewage treatment flocculant. The sewage treatment flocculant is applied to the treatment of heavy metal sewage, the flocculating performance is good, the removal effect of heavy metals is good, and the scaling can be prevented.

The invention relates to a polyaluminum ferric chloride-polyepichlorohydrin-ethylene diamine preparation method comprising the steps that: (1) a polyepichlorohydrin-ethylene diamine solution is prepared; (2) a polyaluminum ferric chloride solution is prepared; and (3) the prepared polyepichlorohydrin-ethylene diamine solution and the polyaluminum ferric chloride solution with a weight ratio of 1:20-1:50 are subjected to ultrasonic oscillation in an ultrasonic wave generator, such that polyaluminum ferric chloride-polyepichlorohydrin-ethylene diamine flocculant is prepared. According to the invention, epichlorohydrin, ethylene diamine, aluminum chloride and iron chloride are adopted as raw materials, and the polyaluminum ferric chloride-polyepichlorohydrin-ethylene diamine is prepared. The flocculant is a novel inorganic-organic high-molecular flocculant. As a high-efficiency water-processing agent, the flocculant can be widely applied in dye wastewater processing, and has advantages such as high molecular weight, good stability, good decolorizing effect, and the like.

The invention provides a chemical adsorbent for processing heavy metal waste water. The Chemical adsorbent for processing heavy metal waste water comprises the following components in parts by mass: 5to 25 parts of calcium oxide, 15 to 40 parts of an inorganic polymer flocculant, 1 to 25 parts of sulfur-containing iron powder, 3 to 30 parts of sodium percarbonate, and 1 to 10 parts of an organicpolymer flocculant. The adsorbent of the invention is simple to use and operate, the conditions are easy to control, the dosage of the medicament is small, and the sedimentation speed is fast.

The invention relates to a coagulation process in water treatment purification technology, wherein metal salt flocculating agent and aquadrate starch are mixed in the form of water solution, and are charged into the water to be processed, the aquadrate, dried maize starch and water solution are mixed for mixing reaction for 3-4 hours under the temperature condition of 90-100 deg. C. The invention realizes fine water purification effect and less influence from water temperature.

The invention relates to an industrial wastewater purification system for a lithium battery. The system comprises an acid-base neutralization unit, a coagulation, flocculation and precipitation unit,a facultative membrane bioreaction unit, a lithium battery production wastewater storage tank, an alkaline wastewater storage tank, an acid wastewater storage tank and a domestic wastewater storage tank. According to the system, a mode of combining the acid-base neutralization unit, the coagulation, flocculation and precipitation unit and the facultative membrane bioreaction unit is adopted, so that the biodegradability of lithium battery wastewater is improved, and a process is simple and the cost is reduced; in addition, treatment of three kinds of wastewater produced by a lithium battery production enterprise is organically combined, so that the three kinds of wastewater can be treated at the same time, the process is simplified, repeated input of equipment and medicaments is reduced and the running cost is reduced; moreover, the acid-base neutralization unit in the system is only used for simple neutralization without any additional medicaments, then acid-base conditioning is performed on the lithium battery production wastewater by use of the remaining acid-base property of the neutralized wastewater and an acid-base conditioner is appropriately added, so that input of the equipment and the medicaments is reduced, and production procedures are also reduced.

The invention discloses an efficient sewage treatment flocculant which comprises the following raw materials in parts by weight: 100-110 parts of lignin, 70-80 parts of propionaldehyde, 25-30 parts of triethylene tetramine, 32-35 parts of formaldehyde sodium bisulfite addition compound, 600-620 parts of normal propyl alcohol, 10-12 parts of glycidyl trimethyl ammonium chloride, 23-26 parts of poly-ferric aluminum sulfate, 25-28 parts of PPFC, 4-8 parts of aluminium chloride and 22-26 parts of sodium polystyrene sulfonate. The invention further discloses a preparation method of the efficient sewage treatment flocculant. The efficient sewage treatment flocculant obtained through the preparation method is excellent in flocculating performance and heavy metal removal effect and can prevent scaling.

The invention relates to a preparation method of a composite flocculant, which comprises the following steps: (1) preparing a polyepoxy chloropropane-ethylenediamine solution; (2) preparing a polyaluminum chloride solution; and (3) putting the polyepoxy chloropropane-ethylenediamine solution and the polyaluminum chloride solution in a weight ratio of 1:20-1:50 into an ultrasonic generator, and carrying out ultrasonic vibration to prepare the polyaluminum chloride-polyepoxy chloropropane-ethylenediamine composite flocculant. The polyaluminum chloride-polyepoxy chloropropane-ethylenediamine composite flocculant is prepared from the epoxy chloropropane, ethylenediamine and aluminum chloride. The flocculant belongs to a novel inorganic-organic high polymer flocculant, can be widely used as an efficient water treatment reagent for dyeing wastewater treatment, and has the advantages of high molecular weight, high stability, favorable decolorization effect and the like.

The invention discloses a preparation method of a starch-based composite flocculant. The preparation method comprises: dissolving starch in water to obtain a 10-20% starch solution, slowly adding NaOH to the 50-60 DEG C water bath at a uniform speed according to a mass ratio of the NaOH to the starch of 1:8-12, and carrying out a stirring reaction for 40-80 min to obtain a modified starch solution; adjusting the pH value of the modified starch solution to 2.0-3.5 with sulfuric acid; and adding polysilicate ferric to the modified starch solution according to a ratio of the starch to the polysilicate ferric of 0.25-0.5:1, maintaining the pH value at 2.0-3.0, carrying out a reaction for 3.5-4.5 h in a 50-60 DEG C constant temperature oscillator, and standing overnight so as to age. According to the present invention, the starch-based composite flocculant has characteristics of no toxicity and no residue, has the SS removal efficiency of more than 90%, and has the COD removal efficiency of more than 60%, wherein the treatment cost is 0.2 yuan/m<3>, and the separated pig manure can further be directly used as the fertilizer for fruit trees and forest, and can be used as the raw material of the organic fertilizer.

The invention provides a composite cationic polyacrylamide flocculant and a preparation method thereof. The composite cationic polyacrylamide flocculant comprises the following raw materials in partsby weight: 50-80 parts of starch polyacrylamide, 20-50 parts of activated silicic acid, 0.9-2 parts of liquid polyaluminum chloride, 0.1-0.5 part of a stabilizer, 7-12 parts of zinc sulfate, 7-12 parts of magnesium sulfate and 1-5 parts of a borax solution. In the present invention, the activated silicic acid can increase the polymerization degree of the polyaluminium chloride and adjust the internal charge structure of the polyaluminium chloride; the activated silicic acid interacts with aluminum ions in the system to generate larger polymer (polyaluminum silicate chloride), and the polyaluminum silicate chloride simultaneously has three functions of electrostatic neutralization, adsorption bridging and net capture in the wastewater treatment process, so that the flocculation settling capacity of the composite flocculant is enhanced, and the obtained flocculant is relatively moderate in price and relatively high in cost performance.

The invention discloses a new composite ethyl orthosilicate-polyaluminium chloride flocculant preparation method. Through high temperature curing processing of traditional polyaluminium chloride, higher content of aluminum 30 form can be obtained, during curing, ethyl orthosilicate is introduced, and a new composite ethyl orthosilicate-polyaluminium chloride flocculant product is synthesized; the new composite ethyl orthosilicate-polyaluminium chloride flocculant product contains high content of nano aluminum 30 and silicon sol, can play efficient electricity neutralization capability of the aluminum 30, and can play the adsorption bridge enhancement capacity of the silicon sol, better effect of coagulation can be achieved, the use range of the flocculant can be broadened, and the problems of not good flocculation effect and narrow feed dose range of the traditional polyaluminium chloride flocculant can be solved.

The invention discloses a preparation method of a polyepichlorohydrin-ethanediamine decolorizing agent. The preparation method comprises the following steps: (1), taking and placing liquid paraffin in a four-port round bottom with a stirrer, a thermometer and a reflux condenser, and controlling the temperature to 0 DEG C-8 DEG C; (2), introducing nitrogen gas in the liquid paraffin, adding ethidene diamine in a container, heating up while stirring, controlling the temperature to 20 DEG C-25 DEG C, and slowly dropwise adding polyepichlorohydrin to carry out addition reaction; (3), continuously stirring for thermal reaction after dropwise adding chloropropane, and cooling the temperature to 15 DEG C; (4), taking 33% trimethylamine as a cross-linking agent to add into liquor, and reacting for 5 hours at 85 DEG C-90 DEG C; (5), cleaning a solid product by methylbenzene, cleaning by alcohol and water, vacuum-drying at 60 DEG C and grinding to obtain polyepichlorohydrin-ethanediamine. According to the preparation method, polyepichlorohydrin-ethanediamine is prepared by using polyepichlorohydrin and ethanediamine as materials and introducing a small amount of trimethylamine cross-linking agent, and has the advantages of high molecular weight, good stability, good decolorizing effect and the like.

The invention discloses a preparation method of a hydrophobic Arabic gum flocculant for antibiotic treatment, which is characterized in that Arabic gum, acrylamide (AM) and hydroxyethyl methacrylate (HEMA) are used as raw materials in the method; by adding Arabic gum into distilled water to prepare an aqueous solution, then sequentially adding AM and HEMA until AM and HEMA are completely dissolved, slowly dropwise adding a surfactant cetyl trimethyl ammonium bromide (CTAB) under the condition of stirring, water bath and heating, and then adding an initiator ceric ammonium nitrate, placing thereactor in a closed stainless steel (SUS316) chamber equipped with a vacuum line, and introducing F2 of a certain pressure into the reactor for fluorination induction; and sealing the reactor after the induction is finished, heating in a water bath under a stirring condition to initiate a polymerization reaction, and curing and purifying to obtain the hydrophobic Arabic gum flocculant for antibiotic treatment. The method is stable in reaction and easy to control, and the obtained hydrophobic Arabic gum is good in solubility and excellent in antibiotic treatment effect and has a good application prospect.

The invention provides a preparation method for an efficient flocculating agent for papermaking wastewater treatment. The preparation method comprises the following steps: (I) preparing acrylamide copolymer; (II) preparing ionic type acrylamide copolymer; (III) preparing 2-naphthylamine-3,6,8-trisulfonic acid modified ion type acrylamide copolymer; (IV) preparing polydimethoxysilane modified 2-naphthylamine-3,6,8-trisulfonic acid modified ion type acrylamide copolymer; and (V) performing ion exchange with aluminium chloride. The invention further discloses the efficient flocculating agent forpapermaking wastepaper treatment, prepared by the preparation method. The efficient flocculating agent for papermaking wastepaper treatment has the advantages of being low in cost, high in flocculating and precipitating efficiency, good in effect, less in dosage, small in environmental influence, good in performance stability, and green and environment-friendly in use.