863results about "Aluminium chlorides" patented technology

The invention provides a method for cooperative activation of fly ash and decomposition of gypsum for recovery of a sulfur resource. According to the method, solid waste, i.e., fly ash, discharged by a coal-fired power plant or coal-fired boiler is used as a raw material, a certain proportion of desulfurized gypsum discharged by the coal-fired power plant or waste phosphogypsum produced in the phosphorus chemical industry is added and mixed with the fly ash, then the obtained mixture is subjected to ball milling, and activation and calcination at a temperature of 950 to 1450 DEG C are carried out for 5 to 180 min; calcium sulfate in the gypsum are almost totally decomposed after calcination, and produced gas contains sulfur dioxide or sulfur trioxide which can be used as feed gas for preparation of sulfuric acid; and calcination enables solid fly ash to be activated, leaching with a sulfuric acid or hydrochloric acid solution is carried out at a temperature of 50 to 100 DEG C, and the leaching rate of alumina is greater than 80%. The method provided by the invention has the advantages that since all the raw materials are solid waste, the purpose of treating the waste by using the waste is achieved; elemental sulphur in the gypsum can be recovered; and the fly ash can be activated and activity of the fly ash can be improved, so a high alumina recovery rate at a low temperature can be realized. With the method, high-efficiency extraction of alumina in the fly ash is realized; the sulfur resource in the gypsum is recovered; shortage in industrial sulphur in the sulfuric acid industry in China is compensated; and the method has good economic benefits and wide industrial application prospects.

Aluminum and aluminum-zirconium antiperspirant compositions of enhanced efficacy and a pH value of at least 3.5 are provided that are made by reaction with insoluble, strongly alkaline strontium or calcium salts. The aluminum and aluminum-zirconium strontium or calcium compositions show high pH values with characteristic HPLC Band III to Band II ratios of at least 0.5. The basic aluminum halohydrate (or nitrate) solutions typically have aluminum to anion ratio of less that 1.9. The solution compositions are stable with respect to both HPLC Band III to Band II ratio and viscosity at concentrations of about 20% to about 40% by weight of anhydrous solid. The solid state compositions form hard sticks with low irritation, at low metal to chloride ratios of about 0.9 to about 1.2.

The invention discloses a method for preparing flocculant liquid polyaluminum chloride from aluminum ash, belonging to the technical field of solid waste treatment environment protection. The method comprises the following steps: uniformly mixing and stirring aluminum ash and water in a volume ratio of 1:(3-5), and soaking for 5-8 hours; pumping the solution into a reaction kettle, adding hydrochloric acid and water in an aluminum ash/hydrochloric acid/water volume ratio of 1:(2.5-3.0):(3.0-4.0), and reacting at 85-100 DEG C for 2-3 hours; carrying out solid-liquid separation with a plate and frame type filter-press, and adding a regulator to regulate the aluminum oxide content and basicity of the liquid, wherein if quicklime is used as the regulator, the volume ratio of the liquid to the quicklime is 1:(0.054-0.086), if aluminum dust is used as the regulator, the volume ratio of the liquid to the aluminum dust is 1:(0.023-0.04), and if solid calcium aluminate is used as the regulator, the volume ratio of the liquid to the solid calcium aluminate is 1:(0.042-0.063); and standing and aging for 48-72 while controlling the temperature at 50-60 DEG C, thereby obtaining the liquid polyaluminum chloride finished product. The invention has the advantages of simple technique, low cost and no secondary pollution, and is a good method for recycling aluminum ash.

A process for preparing aluminium sol includes such steps as proportionally mixing alumina and/or aluminium hydroxide and/or another aluminium source with sulfuric acid, reaction at 80-150 deg.C for 2-18 hr while stirring, adding water, aqueous solution of hydrochloric acid, or the aqueous solution containing aluminium chloride, adding aluminium, and reaction at 80-150 deg.c and 1-5 atmos for 3-40 hr. Its advantages are low cost, and ihgh viscosity.

The invention relates to a method for producing an aluminum polychlorid water purifying agent from waste hydrochloric acid and aluminum ash. The method comprises the following steps: carrying out dissolving reaction on the solid waste aluminum ash produced in an aluminum electrolysis process and waste hydrochloric acid produced in a resource utilization process of high-aluminum coal ash, so as to obtain an aluminum-containing solution; adding alkaline salt or alkali into the aluminum-containing solution, and carrying out polymerization reaction, so as to obtain a primary product; and ageing the primary product, so as to obtain an aluminum polychlorid liquid product. By utilizing the method, the problems of solid waste pollution and wastewater emission can be solved, and the aluminum polychlorid product meeting the index requirements of national standard (GB15892-2009) can be prepared; and the method has good economic and social values.

A joint preparation method of potassium dihydrogen phosphate, sulfur-based compound fertilizer and polymerize aluminum chloride(PAC), its characteristics include follow steps: dissolution and conversion of ammonium dihydrogen phosphate, filtering and cooling crystallization, double decomposition and neutralization cooling crystallization, prepared sulfur-based compound fertilizer, aluminum powder acid solution, preparation of PAC, and so on. Using this invention, not only can solve the impurities interference problem which caused by using orthophosphoric acid (phosphate) to produce potassium dihydrogen phosphate by wet method, can improve the recovery rate of potassium dihydrogen phosphatea almost to 100%, but also can obtain by-product of no chlorine sulfur-based compound fertilizer and PAC; the invention can make almost all the phosphorus pentoxide be water-soluble finished product, not after granulation and drying, directly through crystallization to obtain whole soluble compound fertilizer. Mother liquor circulation reaction make the eliminating of chlorine problem be simple; therefore, the product is high yield, low energy consumption, good quality.

The invention discloses a recycling process of polyaluminium chloride filter residue; the process is as follows: adding water and hydrochloric acid into a first reaction kettle to prepare a 22-28% hydrochloric acid solution, adding the filter residue, stirring until the filter residue is dissolved; heating to 55 to 85 DEG C, adding aluminium-containing waste slag, after the addition, controlling the material liquid system temperature to be 92 to 118 DEG C for reacting for 2.5-5h; controlling the basicity of the material liquid after the reaction to be 27% + /-11% by adjustment of weight parts of the hydrochloric acid and the filter residue; separating the residue from the material liquid after the reaction, taking mother liquor, adding calcium aluminate powder; adjusting the material liquid density to be greater than or equal to 1.20g / ml, adding a synergist solution, reacting at 85-125 DEG C for 2.5-5h to obtain liquid polyaluminium chloride; and collecting and recycling the produced filter residue for reusing in production system to continue participating into the reaction. The recycling process achieves reuse of the filter residue in the polyaluminium chloride production system without addition of process equipment and other materials, greatly reduces the polyaluminium chloride production cost, reduces filter residue emissions, and conforms to environmental protection concepts of circular economy, energy saving and emission reduction.

The invention discloses a method for secondary aluminum ash harmless use. The method comprises the following steps: mixing water with secondary aluminum ash, heating, stirring, leaching, and carryingout solid-liquid separation after water leaching so as to obtain primary filtrate and primary filter residues; heating and evaporating the primary filtrate so as to obtain a soluble salt; mixing the primary filter residues with an acid, heating and stirring to achieve leaching; after acid leaching, and carrying out solid-liquid separation so as to obtain secondary filtrate and secondary filter residues; manufacturing bricks with the secondary filter residues; adjusting the pH value of the secondary filtrate within 2.5-3.0; heating and aging the secondary filtrate after the pH value is adjusted, thereby obtaining aluminum polychlorid. By adopting the method, the aluminum element in secondary aluminum ash can be utilized to the maximum extent, aluminum nitride which is hard to react with theacid can be converted into aluminum hydroxide which is easy to react with the acid through high-temperature water leaching, dissolution of the aluminum element in the secondary aluminum ash can be improved, and the content of aluminum oxide in a prepared aluminum polychlorid product can be increased; in addition, a salt solvent and a nitrogen element in the secondary aluminum ash can be recycled,and damage of leaching residues upon the environment can be reduced.

This invention describes a process for preparing high-purity nanoscale polyalumina sols. This invention uses active aluminum hydroxide and industrial hydrochloric acid as raw materials, and adopts a two-stage reverse stripping process to produce a solution of polyaluminum chloride with an alkalinity higher than 50%, which is then increased to 70% or higher using high-purity calcium aluminate as the alkalizer. The process ensures complete stripping of the aluminum hydroxide raw material at normal atmosphere and a low temperature, thus obtaining a high-purity product. In addition, in the produced polyaluminum chloride sols the total content of nanoscale Al13 and Al30 having Keggin structure is higher than 70%, the alkalinity is 70-85% and the aluminum concentration is 10-19% (measured as Al2O3). The product is widely used as raw material for modern fine chemical binders, gluing agent for neutral paper manufacturing, intermediate or additive for modern pharmaceutical technology, coupling agent and catalyst for chemical production and flocculant for water treatment, and has potential applications in such emerging fields as inorganic nanocomposites and inorganic membrane materials.

The invention discloses a method for producing aluminum chloride by using fly ash, and relates to a comprehensive utilization method for fly ash. The method is characterized in that the fly ash is adopted as the raw material; a chlorinating agent and a reducing agent are adopted to chlorinate aluminum in the fly ash into the aluminum chloride at a temperature of 500-1300 DEG C, and silicon, iron, titanium and other elements are partially chlorinated into the corresponding chlorides; the chlorinated gaseous mixing product is subjected to step-by-step cooling, wherein ferric chloride and aluminum chloride are condensed from the gaseous mixing product, and then silicon tetrachloride and titanium tetrachloride are condensed from the gaseous mixing product; the tail gas is treated and exhausted; the solid mixture comprising the ferric chloride and the aluminum chloride is heated into the gaseous mixture, and the resulting gaseous mixture is sequentially subjected to reduction reactions with scrap iron and scrap aluminum; the reduced gas is cooled to obtain the purified anhydrous aluminum chloride. With the method for producing the aluminum chloride by using the fly ash, the production cost of the anhydrous aluminum chloride can be effectively reduced, the fly ash is effectively utilized, the environment pressure is reduced, and the comprehensive economic benefits are improved.

A technique for preparing polyaluminium chloride is characterized in that: the technique controls the water insoluble substances by a two-step coagulating sedimentation method and comprises the steps of: (1)generating aluminic acid solution by the reaction of aluminium-containing raw material and hydrochloric acid in an acid-proof vessel, adding acid soluble coagulant to execute coagulating sedimentation, and then picking up the supernatant as mother liquor; (2)adding water into the mother liquor obtained in step (1), and heating up in an acid-proof vessel, and then adding calcium aluminate to react in atmospheric pressure, finally adding polymerization coagulant; (3)precipitating to obtain the supernatant which is liquid PAC, obtaining solid PAC by means of drying. The present invention has the advantages of that: the two-step coagulating sedimentation method can overcome the problem of that the control and reduction of the water insoluble substances in PAC preparing process, which uses calcium aluminate as raw material, is hard, the operation is simple, the cost is lower, the settling time can be reduced at 10~20 times, the operability is better, the economic benefit is obviously and each index of the PAC product can satisfy the national standard.

The invention relates to an anhydrous aluminum chloride production method. In the prior art, the aluminum chloride product produced by using the hydrochloric acid dissolution method has disadvantages of fine particle, large specific surface area and high impurity content, does not meet metallurgical grade alumina requirements, and is difficultly be subjected to direct use, and the prepared aluminum chloride purity is low and difficultly meets the industrial requirements even the aluminum chloride product is utilized. With the production method of the present invention, the problems in the prior art are solved. The production method comprises: immersing an aluminum production raw material into hydrochloric acid to obtain an aluminum chloride solution; directly carrying out concentration crystallization on the prepared aluminum chloride solution to obtain an aluminum chloride hexahydrate crystal; calcining the aluminum chloride hexahydrate crystal to obtain primary alumina; and mixing the primary alumina and carbon, adding to a chlorination furnace, introducing chlorine gas, heating, carrying out a reaction of the alumina and the chlorine gas to generate gaseous aluminum chloride, and carrying out refining impurity removing to obtain the pure anhydrous aluminum chloride. The production method of the present invention is used for industrial production of the anhydrous aluminum chloride.

The present invention relates to a preparation method for crystalloid aluminum chlorate, in particular to a preparation method for crystalloid aluminum chlorate by using the circulating fluidized bed fly ash as raw material. By means of the better chemical activity of the aluminum contained in the circulating fluidized bed fly ash, the aluminum chlorate solution is obtained from the circulating fluidized bed fly ash by a direct acid dissolution process, and then the supernatant is obtained by separating the slag from the liquid in a setting tank, and the supernatant is concentrated and crystalled, finally, the solid crystalloid aluminum chlorate is obtained after spray drying. The present invention has a wide range of raw material, a low cost, a simple manufacturing process, quality product, less energy consumption, and meets the circular economy conception.

The invention relates to a method for reproduction by using polyaluminium chloride residue, belonging to a chemical engineering method. The method comprises the following steps: a great amount of residue, generated in the production of polyaluminium chloride which is obtained by the reaction of bauxite or calcium aluminate powder with acid liquor, reacts with alkali liquor to extract the polyaluminium chloride. The method has the advantages of being reasonable in design, and capable of effectively recycling aluminium ion in residue, effectively lightening environmental pollution and saving theproduction cost.

A process for preparing high-Al aluminium polychloride from aluminium hydroxide includes such steps as mixing aluminium hydroxide with industrial hydrochloric acid, adding the catalyst containing P compound and Al compound, heating to 90-180 deg.C, reacting under 1-8.0 Kg/sq.cm for at least 2 hr, depositing and taking supernatant as product.

The invention discloses a technology method used for producing poly aluminium chloride and calcium aluminate. The technology method comprises following steps: 1, ash stir frying is carried out, and metal aluminum is recycled so as to obtain secondary aluminum ash; 2, the secondary aluminum ash is subjected to deamination processing so as to obtain a deaminated aluminum ash slurry; 3, the deaminated aluminum ash slurry is subjected to defluorination processing so as to obtain a defluorinated aluminum ash slurry; 4, the defluorinated aluminum ash slurry is filtered so as to obtain a filtrate anda filtration residue, wherein the filtrate is a poly aluminium chloride solution; and 5, the filtration residue is washed until the pH value is 7, is uniformly mixed with a calcium based auxiliary material, drying and high temperature reaction are carried out, after reaction, cooling, crushing, and grinding processing are carried out so as to obtain calcium aluminate. According to the technologymethod used for producing poly aluminium chloride and calcium aluminate, secondary aluminum ash is subjected to complete harmless processing, so that high efficiency resource utilization of secondaryaluminum ash is realized, and the produced products possess better economical benefit.

The invention relates to a method for producing polyaluminium chloride, which comprises the following steps: adding aluminum-containing waste residue into solution of hydrochloric acid and reacting at 90 to 120 DEG C and under a normal pressure for 3 to 5 hours; filtering, collecting mother solution, filling the mother solution into an acid-resistance and vapor-heated reactor with a stirring device, starting stirring, supplying a proper amount of water, starting to add calcium aluminate powder, and after the addition is finished, regulating the density of feed liquid to more than or equal to 1.20g/ml with water; and adding a synergist, heating and keeping the temperature between 90 and 120 DEG C, reacting at normal temperature for 3 to 5 hours, and obtaining finished liquid polyaluminium chloride. Compared with the prior art, the method, which uses aluminum-containing waste residue obtained after the neutralization of waste liquid from surface pickling of aluminum ingots and bands as raw material, reduces the manufacturing cost of polyaluminium chloride, recycles aluminum-containing waste residue and is in accordance with the environmental-protection concept of energy conservationand emission reduction.

The present invention discloses a refining process method for producing anhydrous aluminum chloride through high aluminum fly ash, wherein high aluminum fly ash (the alumina content is more than or equal to 25%) is adopted as a raw material, a carbon value reducing agent is matched, chlorine gas is introduced to carry out a chlorination reaction, and the mixed gas discharged from a chlorination furnace is subjected to treatments such as cooling, distillation and rectification to prepare the anhydrous aluminum chloride product meeting the national standard. The method of the present invention has characteristics of cheap and easily available raw material, high product purity, easy large-scale industrial production, and the like.

A process for preparing aluminium polychloride from hydrochloric acid and aluminium hydroxide includes such steps as blowing appropriate quantity of chlorine gas into the mixed solution of hydrochloric acid and aluminium hydroxide, reaction of chlorine gas on water in the solution to generate hydrochloric acid and hypochlorous acid as catalyst for next reaction, and reaction of hydrochloric acid on aluminium hydroxide to generate aluminium hydroxychloride. Its advantages are simple process and equipment, short period, and high sterilizing, seaweed-killing and decolouring function. The productis an efficient water deaner.