32results about How to "Promote neutralization" patented technology

The invention discloses a preparation method of high-activity crystal seed by hydrolysis of a titanium sulfate solution and belongs to the technical field of production of titanium dioxide by a sulfuric acid method. The preparation method comprises the following steps of (A) taking and putting a hydrolytic titanium sulfate solution into a preheating groove to be preheated to 50-65 DEG C, wherein the concentration of TiO2 in the hydrolytic titanium sulfate solution is 195-205g/L, the concentration of Ti<3+> is 1.0-3.0g/L (calculated by TiO2), the concentration ratio F between effective acid andtotal TiO2 is 1.70-1.85, the concentration ratio between Fe and TiO2 is 0.26-0.31, the solid content is less than 30mg/L, and the stability is greater than or equal to 500; (B) preheating alkaline liquid to 50-65 DEG C, and controlling the concentration of the preheated alkaline liquid to 8.0-8.5%; (C) within 1-4 minutes, adding the hydrolytic titanium sulfate solution into the alkaline liquid, and after the reaction is finished, controlling the temperature of the crystal seed titanium sulfate solution to be 40-60 DEG C; (D) diluting and controlling the concentration of TiO2 in the crystal seed titanium sulfate solution to be 30-160g/L. The crystal seed prepared by the method is high in activity, less in added amount in water crystallization and high in hydrolysis rate, and the obtained hydrated titanium dioxide is uniform in particle size distribution.

The invention provides a lithium alginate production process.The lithium alginate production process includes steps: (1) performing alkali digestion of brown algae to prepare alginic acid; (2) adding the alginic acid and a certain quantity of a composite lithium salt into a neutralization reactor to react for 50-70min until the alginic acid and the composite lithium salts are completely neutralized to form lithium alginate, wherein neutralization reaction includes solid-phase neutralization reaction and liquid-phase neutralization reaction with ethyl alcohol serving as a medium; consumption of the composite lithium salt is 7-15% of that of the alginic acid; the composite lithium salt is composed of lithium carbonate and lithium acetate, and a ratio of the lithium carbonate to the lithium acetate is 80-90:10-20; (3) performing centrifuging, plunger extruding granulation, drying and grinding to obtain lithium alginate in required meshes.The lithium alginate prepared according to the process is 100-2000mPa.s in viscosity, 40-320 in mesh number, 6.0-8.0 in pH value, smaller than or equal to 15.0% in moisture content and 14-28% in ash content.In addition, the lithium alginate production process can be implemented under the condition of existing sodium alginate solid-phase and liquid-phase neutralization production technology.

The invention provides production technology of magnesium alginate. The production technology comprises the following steps: (1) preparing alginic acid from brown algae via alkali digestion; (2) adding alginic acid and a certain amount of composite magnesium salt into a reactor, and reacting for 50-75 min till alginic acid and composite magnesium salt are neutralized and are completely converted to magnesium alginate, wherein the neutralization reaction comprises a solid-phase neutralization reaction and a liquid-phase neutralization reaction taking alcohol as a medium; (3) using the composite magnesium salt with the amount being 7-15% of that of alginic acid; (4) taking magnesium chloride and basic magnesium salt, the ratio of which is 10-20:80-90, to prepare the composite magnesium salt, wherein (5) the basic magnesium salt comprises one or more of magnesium bicarbonate, magnesium hydroxide, magnesium carbonate, magnesium oxide, magnesium acetate, and magnesium silicate; and (6) performing centrifugation, plunger extruding granulation, drying, and pulverizing to prepare magnesium alginate with a required mesh size. Magnesium alginate prepared in the invention has the viscosity in a range of 100-2000 mPa.s, the mesh size in a range of 40-320 mesh, the pH value in a range of 6.0-8.0, a water content no more than 15.0%, and an ash content in a range of 14-28%. The production technology can be realized in a condition of conventional solid-phase, and liquid-phase neutralization production technology of algin.

The invention relates to the technical field of industrial sewage treatment equipment, and discloses a low-energy-consumption sewage treatment device based on carbon source recovery. The low-energy-consumption sewage treatment device comprises a treatment tank, wherein a water inlet is fixedly formed in the top of one side of the outside of the treatment tank; the bottom of an inner cavity of thetreatment tank is fixedly connected with the bottom end of a support frame; one end of a transmission rod is movably sleeved and connected with the top end of the support frame; the other end of the transmission rod penetrates through the inside of a sealing plate, extends to the top of the inner cavity of the treatment tank, and is movably sleeved and connected with the top of the inner cavity ofthe treatment tank. The low-energy-consumption sewage treatment device based on carbon source recovery has the advantages that through the matching of a chemical addition tank and an electromagneticvalve, chemicals can be conveniently and better added into sewage in an inner cavity of the treatment tank, so that the problems that the workload of workers is increased through the manual chemical addition, and the consumption of chemicals cannot be easily mastered are solved; the investment of the sewage treatment device on the chemical cost is reduced; the treatment effect of the low-energy-consumption sewage treatment device on the sewage is improved.

Methods for reducing and regulating the acidification of water are provided. The method for reducing the acidification of water includes contacting at least one melanin material with the water and catalyzing a reaction between the water, CO₂ and/or bicarbonate that produces glucose and increases pH of the water. The acidification of water is regulated by removing the at least one melanin material from the water once a desired pH of the water has been attained. The methods for reducing and regulating the acidification of water are particularly suited for the treatment of seawater that has been acidified by naturally occurring or artificially initiated reactions that increase free hydrogen ions in water, for example absorption of atmospheric carbon dioxide.

The invention discloses a production device and method of aluminum hydroxide. The production device comprises an inorganic membrane reactor, a meta-aluminate supply unit, a carbon dioxide supply unit and a reaction product storage unit. The meta-aluminate supply unit is connected with a liquid-phase inlet of a shell of the inorganic membrane reactor and used for supplying a meta-aluminate solution to a cavity of the inorganic membrane reactor. The carbon dioxide supply unit is connected with a gaseous-phase inlet of an inorganic membrane assembly of the inorganic membrane reactor and used for supplying carbon dioxide to the inorganic membrane assembly of the inorganic membrane reactor. The meta-aluminate solution and the carbon dioxide are reacted in the inorganic membrane reactor to form a reaction product with the aluminum hydroxide. By means of the aluminum hydroxide obtained through the production device and method, pseudo-boehmite stable in quality can be produced.

The invention provides a method for preparing a halogenated polymer. The method comprises the following steps: a) a polymer and a halogenation agent are contacted under existence of an organic solvent and an initiator, partial hydrogen atoms in the polymer are substituted by halogen atoms to obtain a halogenation polymer solution containing halogen hydride and the initiator; and b) the halogenation polymer solution obtained in the step a) and alkali lye are fully mixed under supersonic wave effect to remove halogen hydride and the initiator. According to the method, dehalogenation and discoloration of the halogenated polymer product in a subsequent drying process are effectively inhibited; technical condition and process are simple and easy, and the pure halogenated polymer product which is not easy to fad is provided.

The invention discloses a method for adding carbonic acid by adopting a carbonic acid solution adding system. The method comprises the following steps of 1) establishing a carbonic acid solution adding system which comprises a mixer and a diffuser, arranging an annular coil pipe or a liquid storage tank and a long-distance pipeline between the mixer and the diffuser, arranging the diffuser in water to be treated, enabling the side wall of the diffuser to be provided with a channel for releasing a carbonic acid solution, namely a small hole or a narrow gap or a combination of the small hole and the narrow gap, and enabling the channel to generate a certain back pressure and enabling the supersaturated carbonic acid solution to be sprayed into water to be treated at a certain pressure, 2) heating and regulating the pressure of the carbon dioxide gas to a certain temperature and a certain pressure, and feeding the carbon dioxide gas into the mixer, 3) pressurizing reaction water to a certain pressure through a water pump, and feeding into the mixer, and 4) arranging a water quality on-line detector in the raw water, and controlling the flow of the carbon dioxide gas through the connection of a signal receiver and a PLC. According to the method, the water quality can be accurately adjusted, meanwhile, bubbles can be greatly reduced, and the utilization rate of carbon dioxide gas is greatly increased.

The invention discloses a carbonic acid solution adding system. The system comprises a mixer and a diffuser, and further comprises a carbon dioxide gas pipeline and a reaction water pipeline; a water pump is arranged on the reaction water pipeline; the water pump outlet is connected with a mixer inlet; the carbon dioxide gas pipeline is connected with the mixer inlet; an annular coil pipe or a liquid storage tank and a long-distance pipeline are arranged between the mixer and the diffuser; the diffuser is arranged in water to be treated; the side wall of the diffuser is provided with a channel for releasing a carbonic acid solution, and the channel for releasing the carbonic acid solution is a small hole or a narrow gap or a combination of the small hole and the narrow gap; and the channel for releasing the carbonic acid solution can generate certain back pressure and enable the supersaturated carbonic acid solution to be sprayed into water to be treated at certain outlet pressure, and it is guaranteed that the pressure difference between the outlet pressure of the diffuser and the water pressure to be treated is 2 bar or above. The carbonic acid solution adding system can accurately adjust the water quality, greatly reduce the generation of bubbles and greatly improve the utilization rate of carbon dioxide gas.

The invention provides a solid waste digestion environmental protection device, and belongs to the technical field of environmental protection devices. The device comprises a base plate, a processing box, a neutralization box and a circulation box, the processing box, the neutralization box and the circulation box are arranged at the upper side of the base plate in sequence from left to right, the upper side of the processing box is internally provided with a 201, a 202 and a 203 are arranged in the processing box, a plurality of uniformly-distributed leakage holes are arranged between the 202 and the 203, two crushing teeth are arranged in the 202, the right end of the base plate is fixedly connected with a motor, the motor is connected with a first driving mechanism, a second driving mechanism and a third driving mechanism, the first driving mechanism is connected with the crushing teeth to compress and fix waste, and cleaning brushes are arranged on the inner walls, close to each other, of the 202 and the 203. The second driving mechanism is connected with the two cleaning brushes to clean residual waste, the lower inner wall of the 203 is rotatably connected with a sixth rotating shaft, and the sixth rotating shaft movably penetrates through the lower end of the base plate and extends downwards so that toxic gas generated during digestion reaction can be effectively solved, and the digestion rate is increased.