32results about How to "Promote neutralization" patented 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 discloses a separation device and method for removing impurities in waste lubricating oil, and relates to the technical field of separation of impurities in lubricating oil. The separation device cooperates with an alkali neutralization settling tank, a reverse osmosis membrane module, a hydrofining distillation tank and a decolorization refining tank It has the functions of alkali neutralization, sedimentation, water phase infiltration, removal of metal impurities and asphaltenes, hydrofining, stripping distillation, decolorization and refining of waste lubricating oil, and is suitable for high acid value and oxidative deterioration. , Waste lubricating oil with high content of metal asphaltene and complex composition can be separated to obtain lubricating oil base oil with high purity and low impurities. The regeneration recovery rate of waste lubricating oil is improved, the cost of water is reduced, the process setting of the impurity removal method is reasonable, the treatment steps are few, and the impurity removal effect is good.

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 discloses a method for producing pseudo-boehmite by adopting an inorganic membrane reactor. The method comprises a gel forming step, an aging step, a separating and washing step and a drying step. According to the method, the gel forming step comprises the step that a meta-aluminate solution makes contact with mixed gas in the inorganic membrane reactor to generate a reaction product, wherein the mixed gas comprises carbon dioxide gas and one or two of air and nitrogen; the pseudo-boehmite with the stable quality can be produced.

The invention relates to the field of chemical engineering, in particular to a method for synthesizing an ionic liquid of ethanolamine lactate used for absorbing SO2 gas. The method is characterized in that: the water-bath microwave method is adopted to prepare the ionic liquid; under the microwave action, the target product can be quickly synthesized; and for the exothermic reaction, the water bath can remove excessive heat, weaken the microwave action, and better control the reaction temperature. The synthesis reaction time of the method is greatly shortened, and the synthesis reaction can be completed in 30 minutes. The ionic liquid of ethanolamine lactate prepared by the method has the advantages of high yield, short balance time, high desulfurizing efficiency and the like, and can be widely used as a fume desulfurizer.

The invention discloses a low-chloride photothermal molten salt production process and production device. The production process comprises the steps that a, molten salt solution preparation is performed: alkaline liquid and a salpeter solution are used as raw materials to be fed into a neutralizing reactor for neutralization reaction; steam generated through neutralization reaction is subjected toheat recovery; b, a certain concentration of neutralization solution obtained through neutralization reaction is treated by an evaporative crystallization work procedure to obtain molten salt crystals; c, the molten salt crystals are subjected to centrifugal separation and drying to obtain products; centrifugal mother liquid returns to front end work procedures. The alkaline solution is used as raw materials for producing high-quality molten salt; a jet pipe type reactor with a static mixer is used for neutralization reaction; the molten salt solution obtained after the neutralization is usedfor producing solids by evaporation concentration, crystallization or slurry praying drying methods; after the subsequent treatment and package, the solids are used as final molten salt products; thechlorine content can be lower to be 15 to 20 ppm; the corrosion of molten salt products on user equipment can be reduced, so that the service life of equipment is prolonged; the long-period safe operation of a solar photothermal power generation device is ensured.

The invention discloses a production method of large pore volume pseudo boehmite. The production method comprises the following steps: the step of gel-forming, the step of aging, the step of separation and washing and the step of drying. During the gel-forming step, a meta-aluminate solution containing a pore-enlarging agent and carbon dioxide gas are contacted with each other in an inorganic membrane reactor so as to form a reaction product. By the method of the invention, pseudo boehmite of stable quality can be produced.

The invention discloses a production device of pseudo-boehmite and a method thereof. The production device comprises a gel-forming device which comprises a meta-aluminate supply unit, a carbon dioxide supply unit and an inorganic membrane reactor. The inorganic membrane reactor comprises a shell and an inorganic membrane component. The inorganic membrane component is arranged inside the shell and is in seal connection with the shell. The meta-aluminate supply unit is used for supplying a meta-aluminate solution to the inorganic membrane reactor. The carbon dioxide supply unit is used for supplying carbon dioxide gas to the inorganic membrane component. The inorganic membrane component is used for containing carbon dioxide gas and diffusing the carbon dioxide gas into the meta-aluminate solution in the cavity. By the device and the method, pseudo-boehmite of stable quality can be produced.

The invention discloses a preparation method of dicumyl benzene hydroperoxide, which comprises the following steps: a structural compound represented by the following formula is used as a catalyst, and dicumyl benzene is contacted and reacted with an oxygen-containing gas to generate dicumyl benzene-containing hydrogen Peroxide reaction solution. The method has the advantages of simple operation, fast reaction rate, high reaction yield, good safety and excellent industrial application prospect.

The invention discloses a production method of pseudo-boehmite. The production method comprises the following steps: the step of gel-forming, the step of aging, the step of separation and washing and the step of drying. During the step of gel-forming, a meta-aluminate solution and carbon dioxide gas are contacted with each other in an inorganic membrane reactor so as to form a reaction product. By the method of the invention, pseudo-boehmite of stable quality can be produced.

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 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.