27 results about "Aluminum hydroxychloride" patented technology

The acid solubility of the product is larger than 95%, the median diameter is larger than or equal to 80 micrometers, the silicon content is smaller than or equal to 0.01%, and the product can be well applied to the industries of polyaluminum chloride and aluminum sulfate. The preparation method comprises the following steps: mixing an aluminum hydroxide source with a solvent, grinding until the median diameter of aluminum hydroxide in a seed crystal slurry is controlled in a range of 12-35 microns, adding the seed crystal slurry into a sodium aluminate fine liquid, carrying out seed decomposition while controlling parameters during seed decomposition, collecting the aluminum hydroxide with the median diameter of more than or equal to 80 microns, and carrying out vacuum drying, thereby obtaining the aluminum hydroxide powder with the median diameter of more than or equal to 80 microns. And washing and drying to obtain the aluminum hydroxide with high acid solubility and large particle size.

The invention discloses a composite metal-based coagulation water purifying agent and a preparation method thereof, and belongs to the technical field of water treatment.The preparation method comprises the steps that firstly, water dissolution acidification and salting-out are conducted to obtain acidified polyaluminum ferric chloride powder, the acidified polyaluminum ferric chloride powder and cerium nitrate are modified and precipitated to obtain cerium modified polyaluminum ferric chloride powder, then hydrophobization and titanium dioxide grafting are conducted, and the composite metal-based coagulation water purifying agent is obtained. The preparation method comprises the following steps: preparing titanium dioxide grafted composite powder, hydrolyzing nano cellulose to co-deposit silver nitrate and a silane coupling agent so as to obtain antibacterial cellulose, premixing the titanium dioxide grafted composite powder with the antibacterial cellulose and anionic polyacrylamide, adding magnesium aluminum silicate, crushing, carrying out fluidized drying, and spraying a polydimethylsiloxane solution, so as to obtain the antibacterial titanium dioxide composite material. Finally, the composite metal-based coagulation water purifying agent is obtained. Effects of efficient flocculation, photocatalytic antibiosis and the like are achieved, and the method is suitable for advanced treatment of high-difficulty wastewater.

This invention relates to a method for preparing a perlite-based adsorbent material, the resulting material, and its applications. The preparation method includes: pretreating expanded perlite particles; mixing polyaluminum chloride and urea in water to obtain an impregnation solution; subjecting the pretreated perlite to vacuum impregnation followed by atmospheric pressure soaking, allowing the impregnation solution to enter the open pores; then subjecting it to staged heating treatment to decompose the urea and release alkaline components, promoting the confined transformation and immobilization of aluminum species in the open pores and pore openings of the perlite; subsequently washing, aging, and drying to obtain the perlite-based adsorbent material. The obtained material is a granular material with a particle size of 2–6 mm, containing an aluminum-based immobilization layer on its surface and within its open pores, and can be used for the treatment of phosphorus-containing water.

The application provides a papermaking wastewater treatment agent, which comprises 85-95 parts by weight of a composite modified biochar adsorbent, 3-8 parts by weight of polyaluminum chloride, 2-6.5 parts by weight of silicon dioxide and 0.5-2 parts by weight of sodium acetate; the preparation method of the composite modified biochar adsorbent comprises the following steps: 1) pretreating biochar; 2) modifying the biochar pretreated in step 1) with iron-aluminum hydrotalcite; 3) adding graphene oxide and the biochar modified with iron-aluminum hydrotalcite obtained in step 2) into a treatment liquid, soaking, washing, filtering and drying; 4) uniformly mixing the graphene oxide / hydrotalcite modified biochar obtained in step 3) with polyacrylamide and heat treating; in step 3), the treatment agent is an aqueous solution comprising C 16 ESOCONa with a concentration of 3-4.5 g / L and FeCl3 with a concentration of 0.5-2 g / L. The removal rate of COD and BOD in papermaking wastewater is high.

The invention provides a method for preparing white carbon black from silicon-aluminum-rich solid waste alkaline leaching residues, and belongs to the technical field of white carbon black preparation. The method provided by the invention comprises the following steps: mixing the silicon-aluminum-rich solid waste alkaline leaching residue with acid for acid leaching, adding alkali into the acid leaching solution for silicon precipitation reaction, and then carrying out solid-liquid separation to obtain a silicon precipitation solution and silica gel; drying and refining the silica gel to obtain silicon powder; and mixing the silicon powder and acid, carrying out acid leaching, carrying out solid-liquid separation, and washing and drying the solid powder to obtain the white carbon black. According to the method, the silicon-aluminum-rich solid waste alkali leaching residues are directly subjected to acid leaching, so that silicon and aluminum in the waste residues can be dissolved out, the acid leaching liquid rich in silicon and aluminum is obtained, the pH of the acid leaching liquid is adjusted through alkali, silicic acid can be precipitated out in a silica gel mode, the silica gel is dried to remove hydroxyl, and then acid pickling and impurity removing are conducted to obtain white carbon black; according to the method disclosed by the invention, silicon and aluminum resources in industrial wastes can be recycled; the process is simple, while white carbon black is produced, polyaluminum chloride can be produced as a byproduct, and the economic value is high.

The invention relates to the field of fiber materials, and discloses a polycrystalline alumina fiber and a preparation method thereof.The preparation method comprises the following steps that crystalline aluminum chloride is taken and added into deionized water to be evenly mixed, then a mixed solution of aluminum powder, tartaric acid, nitric acid and lactic acid is added, and heating reflux is conducted to obtain a polyaluminum chloride mother solution; the preparation method comprises the following steps: uniformly mixing basic zirconium carbonate, glacial acetic acid and ethanol to obtain a zirconium-containing solution, uniformly mixing a polyaluminum chloride mother solution, the zirconium-containing solution and tetraethoxysilane, then adding a fiber forming aid, and carrying out reduced pressure distillation and concentration to obtain a spinning colloid; centrifugally throwing the spinning colloid to form a fiber blank; the fiber blank is dried and then subjected to heat treatment, a boron nitride nano layer is deposited on the surface of the fiber blank through a chemical vapor deposition method, and the polycrystalline alumina fiber with good high-temperature-resistant heat insulation performance, acid and alkali corrosion resistance and high tensile strength is prepared.

The application discloses a river silt in-situ curing agent and an implementation method, relates to the technical field of silt curing, and comprises a curing material and a coating layer. The curing material comprises the following components in parts by weight: silicate 20-50 parts, calcium-aluminum hydrotalcite 20-30 parts, cement clinker 25-35 parts, polyacrylamide 2-27 parts, polyaluminum chloride 7-15 parts, tannic acid 1-13 parts, and calcium oxide 5-15 parts. The coating layer comprises three layers and is composed of acrylic high polymer materials. The inner coating layer further comprises a hydrophilic material. The hydrophilic material is silicon dioxide, and the usage amount is 0.5%-3% of the mass of the outer coating layer. Through the intelligent release design of the coating layer, the rapid dehydration and alkaline activation of the calcium oxide, and the gelation-adsorption synergy of the silicate and the hydrotalcite, efficient in-situ silt curing is realized, and multi-component interference under complex environments is resisted.

The invention relates to the technical field of industrial wastewater treatment, and discloses a silicon removal material applied to industrial wastewater treatment and a use method. The silicon removal material comprises the following components: a magnesium reinforced auxiliary agent which comprises 0.5%-2% of hydroxypropyl methylcellulose phthalate, 1%-4% of sodium citrate, 3%-6% of magnesium chloride, 1%-3% of polyethylene glycol and the balance of water; the polysilicate type main agent comprises 7%-10% of polysilicate magnesium aluminum, 3%-5% of polyaluminum chloride, 2%-4% of aluminum hydroxide, 0.5%-1% of sodium hexametaphosphate, 0.3%-0.8% of anionic polyacrylamide and the balance of water. According to the method, the removal efficiency of different forms of silicon is improved, the applicable temperature range is widened, aluminum residues are reduced, and the RO membrane cleaning period is remarkably prolonged.

The present invention provides a method for removing pyrogens from biocompatible polymers such as hyaluronic acid or its derivatives or their salts using aluminum hydroxychloride, which can not only effectively remove pyrogens but also improve the stability of the aqueous solution of hyaluronic acid or its derivatives or their salts.

The application discloses a composite metal-based coagulation water purifying agent and a preparation method thereof, and belongs to the technical field of water treatment. The acidification and salting-out are firstly carried out on water, and acidified polymeric aluminum ferric chloride powder is obtained. The acidified polymeric aluminum ferric chloride powder is modified and precipitated with cerium nitrate to obtain cerium modified polymeric aluminum ferric chloride powder. The cerium modified polymeric aluminum ferric chloride powder is hydrophobized and grafted with titanium dioxide to obtain titanium dioxide grafted composite powder. In addition, silver nitrate and silane coupling agent are hydrolyzed and co-deposited on nanocellulose to obtain antibacterial cellulose. Finally, the titanium dioxide grafted composite powder is premixed with the antibacterial cellulose and anionic polyacrylamide, and magnesium aluminum silicate is added. Then, the mixture is crushed, fluidized and dried, and a polydimethylsiloxane solution is sprayed, so that the composite metal-based coagulation water purifying agent is finally obtained. The composite metal-based coagulation water purifying agent has the effects of efficient flocculation, photocatalytic antibiosis and the like, and is suitable for deep treatment of high-difficulty wastewater.

The present invention discloses a degradable fly ash oil-water interface partition and its preparation method and application. The partition is composed of the following raw materials in parts by weight: 10-20 parts of fly ash, 20-30 parts of polyaluminium chloride, 3-5 parts of urea, 2-4 parts of N,N-dimethylacrylamide / acryloylmorpholine binary polymer, 0.5-1 parts of silica sol, and the balance is water, and the sum of the parts by weight of the above components is 100. The water blocking system of the present invention is easy to prepare, has a wide source of raw materials, good injectability, simple construction process, and low cost, and can automatically spread at the oil-water interface; before curing, it has high viscosity and resistance to dilution, and has the advantage of "right-angle curing"; after curing, the compressive strength of the partition is greatly increased; at the same time, the partition has strong heat and salt resistance, and the partition density is 1.05-1.13g / cm 3 It is adjustable and controllable, and can be degraded in a strong acid environment, which is beneficial to protecting the formation environment.

The invention belongs to the technical field of concrete admixtures, and particularly relates to an environment-friendly concrete composite admixture compounded with desert sand and a preparation method of the environment-friendly concrete composite admixture. The desert sand water reducing agent is prepared from the following raw materials in parts by weight: 30 to 60 parts of desert sand, 20 to 30 parts of a modified high-performance water reducing agent, 10 to 12 parts of a pumping agent, 2 to 5 parts of sodium sulfate, 1 to 2 parts of polyaluminum chloride and 1 to 2 parts of sodium benzoate, comprising the following steps: S1, preparing a high-performance water reducing agent; and S2, preparing the modified high-performance water reducing agent. According to the composite desert sand environment-friendly green concrete composite admixture with the monoglyceride loaded nano silicon dioxide modified high-performance water reducing agent and the desert sand as main materials, under the condition that the doping amount is low, the water reducing rate is increased, the water reducing effect is enhanced, the plasticity retaining property is improved, and the size is relatively stable.

The present invention relates to the technical field of resource recycling of acidic etching liquid, and discloses a method for preparing polyaluminium iron from acidic etching liquid, comprising the following steps: step one, two-stage replacement: aluminum and iron are added to the acidic etching liquid in batches, and copper ions in the acidic etching liquid are replaced in two stages to obtain a mixed solution of sponge copper and ferrous chloride and aluminum chloride; step two, catalytic oxidation: a catalyst is added to the mixed solution, oxygen is introduced, and the divalent iron ions in the mixed solution are oxidized to trivalent iron ions to obtain a reaction solution; step three, post-treatment: the reaction solution is subjected to hydrolysis treatment, polymerization treatment, and aging treatment to obtain liquid polyaluminium iron chloride PAFC. The acidic etching liquid of this scheme adopts the steps of aluminum and iron two-stage replacement of copper ions, oxidation, aging, etc. to obtain polyaluminium iron chloride PAFC and recover copper blocks, effectively realizing the resource recycling of the acidic etching liquid.

The present invention relates to the technical field of fire retardant coatings, and proposes a gypsum-based fire retardant coating for steel structures, a preparation method thereof, and an application thereof. The raw materials of the gypsum-based fire retardant coating include the following components in parts by weight: 150 parts of gypsum powder, 30-50 parts of perlite, 20-40 parts of ammonium polyphosphate, 2-6 parts of graphene oxide, 1-7 parts of aluminum sulfate, and 1-4 parts of aluminum chlorohydrate. Through the above technical scheme, the problems of low compressive strength and low bonding strength with steel structures of gypsum-based fire retardant coatings in related technologies are solved.

The invention belongs to the technical field of biological agents, and discloses a concentrated lactulose solution and a preparation method thereof.The preparation method comprises the steps that purified water and lactose are mixed and stirred to be uniform, then sodium metaaluminate is added, a heat preservation reaction is conducted till the lactose content is smaller than 9%, and then cooling is conducted; adjusting the pH value to 4-7 to obtain a lactulose-aluminum hydroxide flocculation mixed system; adding purified water into the mixed system, uniformly stirring, then adding polyaluminum chloride, uniformly stirring, and standing; carrying out residue-liquid separation on the obtained system, and collecting filtrate; desalting the filtrate until the conductivity is less than or equal to 50 [mu] s / cm, and concentrating to obtain a concentrated lactulose solution meeting the medicinal-grade standard. The problems of aluminum hydroxide precipitation, difficult filtration and low removal efficiency in the prior art are solved by using the polyaluminum chloride, the aluminum ion removal efficiency is higher, the purification operation step is greatly simplified, nanofiltration and resin operation are replaced by one-step electrodialysis desalination, the use of a large amount of purified water and the generation of aluminum salt wastewater are reduced, and the method is suitable for industrial production. The process steps are simplified, the cost is reduced, and the quality is controllable.

This case involves an organic-inorganic polymer composite flocculant and its preparation method. First, diatomite is etched with acid and alkali; then it is mixed with magnetic powder and hyperbranched polymerization is carried out on its surface using triethylenetetramine as the starting material; after modifying polyaluminum chloride with KH570, polymerization is carried out to prepare polyaluminum chloride-methylacryloyloxyethyltrimethylammonium chloride-poly maleic anhydride; it is dispersed with hyperbranched modified diatomite in deionized water, heated to 60 °C and stirred for 24 h, filtered and dried to obtain. Based on polyaluminum chloride, the present invention has prepared a new type of organic-inorganic hybrid composite polymer flocculant. Loading magnetic powder with diatomite as the carrier endows the flocculant with magnetism, making the recovery more convenient and rapid; the hyperbranched polymer and the polymer chain with cationic groups adsorb and capture pollutants in the water body, with high removal rates of COD and turbidity, and can also inhibit the release of aluminum ions, having a very high purification effect and high safety without secondary pollution.

The invention relates to the technical field of glucomannan preparation, provides a preparation method of high-purity glucomannan, and solves the problems of insufficient purity and large molecular weight distribution of existing glucomannan. According to the technical scheme, the method comprises the following steps: pretreating fresh konjak tubers, and sequentially performing multi-stage concentration extraction by using ethanol to obtain crude glucomannan; carrying out ultrasonic-assisted purification by using isopropanol; the purified product is subjected to hydrosolation, flocculation treatment with an aluminum chloride / chitosan composite flocculant, ethanol precipitation and drying treatment, and high-purity glucomannan is obtained. Wherein the aluminum chloride / chitosan composite flocculant is obtained by carrying out alkalization reaction on aluminum chloride hexahydrate and sodium hydroxide to prepare a polyaluminum chloride stock solution, dissolving chitosan in a hydrochloric acid solution to prepare a chitosan stock solution and then carrying out composite reaction. The purity of the glucomannan prepared by the method reaches 95.0-98.2%, the molecular weight polydispersity index PDI is 1.6-2.2, the process is simple, the cost is low, and the glucomannan has wide application prospects in the fields of food, medicine, chemical engineering and the like.

The application provides a high-alkalinity wastewater pH self-adaptive type polyaluminum chloride modification preparation process and belongs to the technical field of water treatment agents. Through a step-by-step in-situ polymerization process, a basic polyaluminum chloride solution is prepared from hydrochloric acid, aluminum hydroxide and calcium aluminate, then an organic modifier containing a carboxyl-phosphonic acid group, a composite pH buffer component and modified nano magnesium-aluminum hydrotalcite are introduced in sequence, and a pH self-adaptive type modified polyaluminum chloride is obtained through polymerization control. The modified polyaluminum chloride prepared by the application has a salt basicity of 75-90%, and the pH application range is widened to 4-12. The modified polyaluminum chloride can still stably play a coagulation role in high-alkalinity wastewater with pH=10-12 without additional adjustment of the wastewater pH. The removal rate of heavy metal ions such as lead, cadmium and hexavalent chromium is increased by more than 40%, and the alum flower sedimentation speed is increased by more than 35%. The treatment cost and secondary pollution of high-alkalinity wastewater are significantly reduced, and the application is suitable for the treatment of high-alkalinity industrial wastewater such as printing and dyeing, electroplating and chemical industry.

The present application relates to a method for producing polyaluminum chloride and recovering sodium chloride by using by-products of methyl phosphine dichloride production, and relates to the technical field of water treatment agents. The method comprises the following steps: crushing blocky mixed salt containing sodium tetrachloroaluminate and sodium chloride, dissolving the crushed mixed salt in water, adding sodium metaaluminate, stirring and reacting, filtering, obtaining aluminum hydroxide solid and crude salt aqueous solution; putting the aluminum hydroxide solid into water, adding hydrochloric acid dropwise under heating and stirring to adjust pH, aging, adding an adsorbent, and filtering to obtain a polyaluminum chloride solution; transferring the crude salt water into a flocculation and precipitation tank, adding an oxidizing agent to oxidize phosphorus impurities, adding sodium hydroxide to adjust pH, and adding polyaluminum chloride; obtaining preliminary refined brine after precipitation is completed, and refining the preliminary brine by membrane filtration to obtain refined brine. The present application realizes circular economy, and has the advantages of simple process, cheap and easily available raw materials, safety and environmental protection, high economic benefits, etc.

The invention discloses a fluorine recovery method and recovery device adaptive to high and low fluorine-containing wastewater, and the method is characterized in that free switching between a calcium fluoride homogeneous crystallization mode and a calcium fluoride heterogeneous crystallization mode of the fluorine-containing wastewater is realized by adjusting the dosage and reaction time of calcium salt and polyaluminum chloride, so that the fluorine recovery method can be adaptive to fluorine recovery of wastewater with different fluorine concentrations; afterwards, calcium fluoride crystal products and hydroxyl aluminum oxide flocs are finally obtained through solid-liquid separation, alkalization treatment, acidification treatment and other means, and the hydroxyl aluminum oxide flocs are recycled. According to the method disclosed by the invention, the fluorine in the wastewater with different fluorine concentrations can be recovered by combining the calcium salt and the polyaluminum chloride, and the method is simple in process equipment, simple and convenient to operate, low in cost and high in purity of the recovered product.

The utility model relates to the technical field of polyaluminum chloride processing, and discloses a polyaluminum chloride reaction kettle, which comprises a reaction kettle body, a discharge pipe is fixed on the outer surface of the reaction kettle body, a mixing cavity and a storage cavity are arranged in the reaction kettle body, an inner sealing cover is fixed at the port of the mixing cavity through a bolt, and an outer sealing cover is fixed at the port of the storage cavity. An inner sealing cover is fixed on the mixing cavity, an inner feeding pipe is fixed on the inner sealing cover, an outer sealing cover is fixed on a port of the storage cavity through a bolt, an outer feeding pipe is slidably arranged on the outer sealing cover, a feeding groove is formed between the mixing cavity and the storage cavity, an electric rod is mounted on the inner bottom surface of the storage cavity, and a pushing plate is fixed at the top end of the electric rod. And an inclined surface is arranged on the material pushing plate. According to the polyaluminum chloride reaction kettle, aluminum skimmings or aluminum slag, hydrochloric acid and a catalyst are put into the storage cavities at different positions, materials can be continuously added into the mixing cavity, and the mixed materials in the mixing cavity can be uniformly stirred and mixed in multiple directions, so that the processing efficiency of polyaluminum chloride is improved.

The invention relates to the technical field of industrial production waste regeneration water treatment agents, and discloses a method for producing water treatment agent polyaluminum chloride by using acid pickling aluminum slag, which comprises the following steps: S1, acidolysis reaction: mixing raw materials of acid pickling aluminum slag, hydrochloric acid and aluminum hydroxide, heating and acidolysis to generate a basic aluminum salt solution; s2, polymerization reaction: adding the basic aluminum salt solution into water, diluting, adding calcium aluminate powder, and carrying out sealed polymerization reaction to obtain a polymerization reaction solution; and S3, post-treatment: adding water into the polymerization reaction solution, carrying out precipitation separation, taking supernatant, carrying out hydraulic filtration to obtain filtrate and filter residues, and drying the filtrate to obtain a solid polyaluminum chloride product. According to the scheme, in the acid pickling aluminum slag treatment process, the acid pickling aluminum slag can be converted into the solid polyaluminum chloride product by adding conventional reagents (hydrochloric acid, aluminum hydroxide, calcium aluminate powder and the like), the process is simple, the production safety and the product safety are high, and the method is conveniently applied and popularized to treatment of the acid pickling aluminum slag.

The application discloses a preparation method and process of a water purifying agent polyaluminum chloride solution, and contains components: aluminum hydroxide, calcium carbonate, dilute hydrochloric acid solution and sodium hydroxide solution, and relates to the technical field of water purifying agents. The preparation method and process of the water purifying agent polyaluminum chloride solution determine the purification treatment degree of the water purifying agent polyaluminum chloride solution on waste water and sewage by using the color brightness change of a synthetic pigment after being dissolved in water, and then facilitate the determination of the water purifying agent adding amount; meanwhile, the accurate feeding of the water purifying agent when sewage with different pollution degrees is treated is solved, the problem that the water purifying agent is added in a small amount and leads to incomplete sewage treatment is avoided, the problem that the water purifying agent is added in an excessive amount and leads to secondary pollution of the sewage is avoided; and the unreacted polyaluminum chloride solution is dispersed at a high speed in the waste water, the impurities in the waste water are dissolved and polymerized, and thus the flocculation efficiency of the water purifying agent on the impurities is improved.

The invention relates to a white master batch for a high-stiffness and high-heat-resistance BOPP (biaxially-oriented polypropylene) film as well as a preparation method and application of the white master batch, and belongs to the technical field of white master batches. The white master batch for the high-stiffness and high-heat-resistance BOPP film is prepared from polypropylene, 60 to 70 weight percent of titanium dioxide, 3 to 7 weight percent of boehmite and 0.15 to 0.35 weight percent of aluminum-titanium bimetallic compound coupling agent, the aluminum-titanium bimetallic composite coupling agent is obtained by reacting an acrylic polymer with butyl titanate and a polyaluminum chloride-propylene glycol complex, the number-average molecular weight of the acrylic polymer is 3000-5000, and the molar weight ratio of carboxyl in the acrylic polymer to butyl titanate is 1: (1.05-1.1); the mass ratio of the butyl titanate to the polyaluminum chloride-propylene glycol complex is (1.4-2): 1. The BOPP film prepared from the white master batch for the high-stiffness and high-heat-resistance BOPP film has the characteristics of high stiffness and high heat resistance.

The application relates to a white master batch for high-stiffness high-heat-resistance BOPP film, a preparation method and application thereof, and belongs to the technical field of white master batches. The white master batch for high-stiffness high-heat-resistance BOPP film comprises polypropylene, 60-70 wt% titanium white powder, 3-7 wt% boehmite and 0.15-0.35 wt% aluminum-titanium bimetallic composite coupling agent; the aluminum-titanium bimetallic composite coupling agent is obtained by reacting acrylic acid polymer with butyl titanate and polyaluminum chloride-propylene glycol complex, wherein the number average molecular weight of the acrylic acid polymer is 3000-5000, the molar ratio of the carboxyl in the acrylic acid polymer to the butyl titanate is 1:(1.05-1.1), and the mass ratio of the butyl titanate to the polyaluminum chloride-propylene glycol complex is (1.4-2):1. The BOPP film prepared from the white master batch for high-stiffness high-heat-resistance BOPP film has the characteristics of high stiffness and high heat resistance.

The present application relates to the technical field of polyaluminum chloride, and particularly relates to a preparation process of polyaluminum chloride, which comprises the following steps: firstly, 31.0-33.0% hydrochloric acid is added into a reaction kettle, stirring is carried out and a micro-negative pressure is maintained, aluminum hydroxide is added in batches, heating is carried out to 70±2 DEG C, and then the reaction is maintained for 3-4 hours to obtain a one-step material. Then, the one-step material is transferred into a neutralization kettle, calcium aluminate powder is added, stirring is carried out, and the reaction is carried out at 85-95 DEG C for 0.5-0.8 hours. Then, diatomite and polyacrylamide are added, and the filter liquor is obtained through pressure filtration. Finally, the filter liquor is cooled through a graphite heat exchanger, the concentration is adjusted, and corresponding additives are added to obtain the polyaluminum chloride product. The temperature, pressure and stirring speed are accurately controlled in the whole process to ensure the product quality. The present application adopts the technical measures of batch feeding, accurate control of the reaction temperature and addition of synergistic agents, so that the product has a more reasonable aluminum polymer distribution structure, and the turbidity removal rate is increased to 99.2-99.5%.