13 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.

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 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 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 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 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%.