462 results about "Neutralization (Chemistry)" patented technology

The invention discloses a preparation method of functional fluorescence carbon nanoparticles (CNPs) based on natural saccharide materials and representation and application thereof in measurement for biotechnique. The preparation method is characterized by comprises the following steps of dissolving 1g of carbon sources (cellulose, starch, chitosan and cyclodextrin) and 0.1g of NaOH into 15ml of deionized water, then reacting reacting for 4 hours in an autoclave at 160 DEG C, and carrying out acid-base neutralization and microwave treatment on the obtained carbon nanoparticles. According to the preparation method, the raw materials are abundant and cheap and are easily available, the preparation method is simple, and the synthesized nanoparticles have good fluorescence characteristic and the characteristics of stable fluorescence, dark flashing, tunable wavelength, wide excitation spectra, narrow emission spectrum and the like, and can be used as a fluorescence indicator in the biological medicine field.

The invention relates to a pyrro-quinoline quinine (PQQ) sodium salt derivative and a preparation method thereof, belonging to the field of pharmacy. In the preparation method, PQQ is used as a raw material, and an acid-base neutralization reaction with PQQ is carried out in a basic solvent of sodium hydroxide to prepare the PQQ sodium salt derivative represented in the structural formula (I), wherein R1, R2 and R3 can be identical or different and respectively represents H, ammonium ion (NH3), potassium ion, sodium ion, magnesium ion, calcium ion or zinc ion, and at least one of R1, R2 and R3 is sodium ion. The invention has mild reaction conditions, easy product refining and purification, simple preparation steps and high yield more than 80%. The PQQ sodium salt derivative has the functions of inhibiting GSK-3 activity, reducing senile pigment formation in a transgenic mouse brain, reducing tau protein phosphorylation and the like. Thus, the PQQ sodium salt derivative can be medically used for treating senile dementia and other diseases.

The invention relates to a method for preparing an amino group or quaternary ammonium salt functional silicon dioxide mesoporous spherical material in the technical field of metal adsorption. The silicon dioxide mesoporous spherical material is obtained by the following steps of: dissolving an anion surface active agent and a non-ionic surface active agent into deionized water; then adding ethanol into the deionized water, heating and stirring; sequentially adding siloxane and organic siloxane into the deionized water to prepare a silicon dioxide mixed solution; heating, standing and reacting the silicon dioxide mixed solution to obtain a silicon dioxide sediment; carrying out centrifugal drying on the obtained silicon dioxide sediment and removing the surface active agents by extraction processing. The steps are simple; by leading a co-structure-directing agent into a reaction system, the amido part of the co-structure-directing agent and the anion surface active agent are combined respectively by acid-base neutralization function and double-decomposition reaction, and the siloxane part and an inorganic source carry out copolycondensation to form a silicon wall, thereby the functional mesoporous silicon material containing an amino group or quaternary ammonium salt is synthesized.

A process for preparing polyol acrylate used as the reactive diluent of irradiation solidification includes such steps as providing polyol and acrylic acid, mixing, adding solvent, polymerizing inhibitor, catalyst and decoloring agent, heating, reflux, adding solid alkali for neutralizing, filtering for removing solid, adding P-hydroxyphenyl mether, vacuum removal of solvent and filtering. Its advantage is no generation of sewage.

The invention discloses a treatment process for medical intermediate production waste water, including sections of a pre-treatment, an anaerobic treatment, an aerobic treatment, and a post-treatment. The pre-treatment includes acid-base neutralization, coagulating sedimentation, and aerating regulation treatment, perforated pipe aerating regulation adopted by regulation pool. An anaerobic biochemical pool and a hydrolysis acidification pool is included in the anaerobic treatment, wherein a soft filler and a multi-face ball filler are installed and anaerobic active sludge is deployed in the anaerobic treatment pool; two stages of aerating biochemical pool are included, wherein a biological filler and a multi-face ball filler are installed, aerobic active sludge is deployed, and micro-porous aerating devices are installed at the bottom to provide oxygen to the aerobic sludge; waste water treated by the aerobic treatment is precipitated at a inclined pipe precipitation pool, a part of macromolecular pollutants are intercepted by a sand filtering pool, and the waste water meeting the standard through detection is discharged into the waste water pipe network in the area. The treatment process has advantages of simple process, convenient operation, low energy consumption, great treatment effect.

The invention provides a preparation method of N-phenylmaleimide (PMI). The preparation method comprises the following steps of: mixing and stirring a catalyst, an organic solvent, a polymerization inhibitor and maleic anhydride (MA) into a reaction kettle, and carrying out heat treatment on the mixture at the first reaction temperature for a first reaction time to form an MA mixture; then, continuously adding aniline into the heat-treated MA mixture in quantity, meanwhile, reflowing and dehydrating, and carrying out acid base neutralization; and layering, washing, cooling and crystallizing to obtain the N-PMI with high yield and purity.

The invention relates to a synthesis method of waterborne polyurethane emulsion. In the synthesis method of the anion type waterborne polyurethane emulsion taking polyhydroxy alkyl acid as the hydrophilic component, the triethylamine-dichloromethane complex is used to replace triethylamine as a salt forming agent and conducts acid-base neutralization reaction with carboxylic groups to form salts; simultaneously, the hydration difficulty caused by the catalytic action of triethylamine on secondary reactions between isocyanate and carboxylic acid as well as between isocyanate and water, ect can be reduced, thereby obtaining the waterborne polyurethane emulsion with stable state under the wider technological conditions.

The invention relates to a preparation method of a low-concentration viscoelastic surfactant solution. The structure of an active ingredient is shown in the specifications. The preparation method of the surfactant solution comprises the following steps of: synthesizing an oleic acid-based Gemini quaternary ammonium salt surfactant in the ratio 18:(1-2)-18:1; performing ion exchange; neutralizing with acid and alkali; and compounding. The surfactant solution is characterized in that: the surfactant solution shows higher viscoelasticity at an extremely low concentration, and can be applied to oil field fracturing fluids, drag reduction agents and daily detergent formulas. The invention contributes to facilitating the application of oleic acid to a surfactant viscoelastic system.

The invention discloses a physicochemical comprehensive treatment system for a dangerous waste liquid. The system comprises a waste liquid storage tank, a paper tape filter, a quenching and tempering groove, four reagent grooves, three reaction vessels with stirrers, a tail gas absorption groove, a buffer tank, a water injection vacuum set, a centrifuge, a suction filtration groove, a membrane processor, a filter press, a filtrate collection pool, two waste liquid intermediate grooves, a sludge collection pool and a wastewater regulating pool. Each processing unit of the invention can be switched and combined flexibly so as to be adapted to various physicochemical comprehensive treatments of a dangerous waste liquid, such as acid-base neutralization, coagulation sedimentation, redox, desalination, solid-liquid separating and tail gas purifying treatment etc. Under the condition of satisfying the technical requirements of waste liquid treatment, the system of the invention can reduce repeated treatment facility construction and investment. Under the premise of ensuring a good treatment effect, the system provided in the invention reduces human consumption, material consumption and energy consumption, and reduces the treatment operation cost of per unit of waste amount. The escaping and leaking phenomena common in present waste liquid treatment processes can be avoided, and secondary pollution to the environment as well as damage to people can be eradicated.

The present invention discloses a preparation method of a multifunctional activated carbon. The process flow is as following: (1) A wooden meal is prepared. (2) Filter (3) Dipping in a phosphoric acid. (4) Dried in the air to granules. (5) Phosphoric acid recovery. (6) Carbonization in a furnace. (7) Carbonization and activation. (8) Phosphoric acid recovery. (9) Acid-base neutralization. (10) Rinsing. (11) Dehydration (12) Drying. (13) Grinding. (14) Casing. The multifunctional activated carbon produced by the present invention can meet the decoloration and the refining requirement of different products, overcoming the disadvantage of the single function for the prior activated carbon. The method has the advantages of pollution-free production, low cost, strong adsorption, high decoloration rate, meeting the decoloration and the refining of food and medicine.

The invention relates to a method for preparing environmentally responsive monodisperse cyclodextrin polymer hollow microspheres. In the process of preparing multi-cavity poly (N-isopropylacrylamide-cyclodextrin) hollow microspheres, the hollow microspheres are endowed with environmental responsiveness, and in the process of preparing crosslinking cores, acid monomers are added to be copolymerized with NIPAM monomers so as to obtain acidic cores; and after cyclodextrin monomers and a crosslinking agent are added into the acidic cores so as to obtain core/shell-structured microspheres, the core/shell-structured microspheres are treated by using alkali liquor, and an ionization effect generated by acid-base neutralization accelerates the collapse of cores and the swelling of crosslinking shell layers, so that the permeability of the shell layers subjected to swelling is enhanced, therefore, a situation that PNIPAM (core) chains in the shell layers quickly escape so as to obtain microspheres is facilitated, and PNIPAM and acid ingredients in the microspheres also endow the hollow microspheres with pH and temperature responsiveness. The method disclosed by the invention solves the problems existing in hollow microsphere preparation implanted by using the existing 'self-removable' technique.

The invention discloses a technology for preparing pseudo-boehmite by a sodium bicarbonate neutralization method, which comprises steps: using NaHCO3 solution and sodium aluminate solution to carry out acid-alkali neutralizing reaction so as to prepare pseudo-boehmite; and after neutralizing reaction, separating, ageing, washing, drying and grinding material to prepare pseudo-boehmite. As reactionmother solution does not contain acid radical ions, processes and devices are not corroded, and simultaneously CO2 gas is pumped into mother solution for depth carbonization to form NaHCO3 solution,and neutralization reaction can be conducted repeatedly, thus fully using production raw material and reducing production cost. The pseudo-boehmite prepared by the technology has good peptization property, fast peptization speed, high peptization rate, low peptization viscosity, concentrated product pore diameter distribution, good caking property and wide application in oil refining, petroleum and chemical industries, environmental protection and chemical fertilizer catalytic agent manufacture.

The invention relates to a method for separating and extracting lignin by using an ultrafiltration membrane, and belongs to the field of the separation and extraction of lignin in a straw or wood. The method comprises the following steps of: dissolving the lignin in the straw or the wood by a base method or a sulfite method, and performing solid-liquid separation on the processed material, wherein a separated solid is used for papermaking and the like; separated liquid is filtered by the ultrafiltration membrane, permeable liquid is recycled and is used for processing the straw or the wood, and trapped liquid serving as concentrated lignin solution is conveyed to an evaporator for further concentration, and is dried to prepare finished lignin; and the lignin can be used for preparing bonding agents, complexing agents and the like. In the method, the problem of acid-base neutralization is solved, so the losses of acid and base are reduced, and chemical reagents added during processing by the base method or the sulfite method can be recycled.

The invention relates to a preparation method of quaternary ammonium ionic liquid, belongs to the field of chemical synthesis and solves the problems of complicated process and long reaction period in the conventional preparation method of the quaternary ammonium ionic liquid. The method comprises the following steps: reacting quaternary ammonium salt with alkali solution, generating anion exchange reaction to generate quaternary ammonium base and generating acid and alkali neutralization reaction with corresponding phosphonic acid anions or carboxylic acid anions to generate the quaternary ammonium ionic liquid. The method has the advantages of simple preparation process, short time, high product conversion rate and easiness in purification, an alcohol solvent can be recycled through distillation, extraction and other methods. The preparation method of the ionic liquid is wide in applicable scope. Compared with the prior art, the preparation method has briefer preparation steps, and the large-scale production is easy.

The invention relates to a preparation method of poly-p-phenylene benzobisoxazole fiber, which is an improvement to the existing salt-forming method. The present invention is that terephthalic acid and 4,6-diaminoresorcinol hydrochloride are neutralized by acid and alkali to directly generate 4,6-diamino-1,3-resorcinol/terephthalic acid composite salt, remove 80-90% of the water in the system by filtration, the compound salt does not need to be further washed and dried, and polyphosphoric acid and phosphorus pentoxide are directly added for polymerization to prepare a poly-p-benzobisoxazole prepolymer. Then the prepolymer is subjected to twin-screw continuous post-polymerization, filtration and defoaming, and directly enters spinning equipment for spinning, water washing, drying and winding to obtain poly-p-phenylene benzobisoxazole fibers. The invention can greatly save time, omit the hydrogen chloride removal process, and increase the continuity of the production process.

The invention provides recyclable ionic liquid type carbon dioxide absorbent and a preparation method thereof. The cation of the absorbent in the invention is a poly-nitrogen straight chain amine substance; and the anion of the absorbent is organic acid radical or inorganic acid radical, wherein the organic acid is a carboxylic acid derivative, a sulphuric acid derivative, a phosphoric acid derivative and carboxylic acid above C3. The preparation method of the absorbent comprises the steps of taking the poly-nitrogen straight chain amine substance and the organic acid or the inorganic acid as raw materials and synthesizing through an acid-base neutralization method. The absorbent disclosed by the invention can absorb CO2 at room temperature or under a high-temperature condition; the absorption effect above 15% on CO2 in mixed gas can be achieved; furthermore, the absorbed ionic liquid can be desorbed; the desorbing rate is more than 99%; the absorbent is recyclable; and, after the absorbent is utilized repetitively for many times, the original absorption amount still can be kept.

The invention discloses a wet chemical treatment method for a heterojunction battery. The wet chemical treatment method comprises the following steps: firstly pre-cleaning a silicon wafer; then carrying out affected layer removal treatment on the silicon wafer; then carrying out texturing treatment on the silicon wafer; then putting the silicon wafer into a mixed solution of hydrochloric acid andhydrofluoric acid for carrying out acid-base neutralization cleaning; then carrying out rounded cleaning on the silicon wafer by using an HF/HCl/O3 mixed solution, removing organic matters and metallic ions and oxidized and etched silicon to round the silicon wafer; carrying out post-cleaning on the silicon wafer after rounded cleaning; and finally slowly pulling and dehydrating the silicon wafer,and drying by using nitrogen. According to the method, O3 is introduced into a wet chemical cleaning technology of the heterojunction battery, the ozone oxidation capacity is high, the oxidizing agents such as H2O2 and nitric acid are effectively replaced, and the application and discharge of highly-pure chemical products are reduced; and moreover, the HF/HCl/O3 mixed solution has multiple effects of removing the organic matters and removing the metal irons and oxidized and etched silicon, the steps and complexity of the cleaning technology are reduced, and the method has the advantages of simple technology process, small using amount of the highly-pure chemical products, small treatment quantity of waste liquid and the like.

The invention discloses an alkaline printing and dyeing wastewater materialization pretreatment method and an alkaline printing and dyeing wastewater materialization pretreatment system. The alkaline printing and dyeing wastewater materialization pretreatment method comprises the following steps of: adding the solution of ferrous sulfate into wastewater, and performing acid-base neutralization and redox reaction on the solution of ferrous sulfate and the wastewater; and adding a macromolecular organic decoloring agent and a coagulant acid for treatment, and performing solid-liquid separation. Through the method and the system, in the pretreatment stage, most of chromaticity and chemical oxygen demand (COD) is removed by materialization treatment, which reduces water-soluble biorefractory substance content, greatly reduces the basicity of the wastewater, weakens impact on a biochemical stage, reduces biochemical load and reduces the energy consumption so as to simplify subsequent wastewater treatment processes and improve the treatment efficiency.

The invention relates to an agent for water supply treatment, in particular to special poly aluminum chloride for municipal water supply and a preparation method of poly aluminum chloride. Poly aluminum chloride mainly solves the technical problems that calcium oxide in calcium aluminate powder carries out acid-base neutralization reaction to certainly influence dissolving of aluminum oxide in calcium powder, detection and adjustment are required constantly in a production process, and a gel phenomenon easily appears in the prior art. The method comprises the steps of adding an aluminum-containing raw material in hydrochloric acid, stirring for sufficient reaction to form poly aluminum chloride liquid, adding calcium chlorate powder or sodium aluminate into the poly aluminum chloride liquid in a stirring tank for sufficient reaction, immediately adding water to cool and dilute after the reaction, and finally obtaining special poly aluminum chloride for the municipal water supply.

The invention discloses a fermentation method for producing high viscocity xanthan gum by xanthomonas campestris, which relates to the technical field of the production of the xanthan gum by using microorganism fermentation engineering. The prior fermentation method for producing the xanthan gum by the xanthomonas campestris comprises: slant mother seeds, shaking culture, starter can culture, total culture medium fermentation culture and fermentation liquor extracting stage; and a fermentation culture stage of the invention is designed to be a basal culture medium fermentation culture stage which comprises a supplementary food culture medium A fed-batch, a food culture medium B fed-batch and a pH regulation and control process. Starch and crude farm product containing starchiness are sequentially batch-fed in two steps under the condition of firm control of fermentation liquor photodensity to increase the carbon nitrogen ratio gradually; the ferment pH value is controlled by an acid-base neutralization solution, so that the process fermentation time is reduced from 60 to 75 hours to 40 to 48 hours; high cost industrial raw materials are replaced by the low cost primary farm products, so that the raw material cost is reduced by 15 to 20 percent; the reduction of the fermentation time reduces the energy consumption by 25 to 30 percent; and experimental data shows that the feed stock conversion reaches 85 to 90 percent and the viscocity is improved by 10 to 20 percent.

The invention discloses a wet desulfurization and dedusting device. The device is connected with a boiler or an industrial kiln tail gas path by a blower fan, and a tower body is also connected with a circulating discharge system. The device is characterized by sequentially and mainly comprising the following treatment structure parts: a pretreatment chamber, a self-excitation chamber, an atomization spray chamber, a gas-liquid separation chamber and a demisting chamber; all the treatment chambers are respectively communicated with each other by water pumps, water pipes and a spray system arranged at the lower part of the tower body; and the treatment chambers are communicated with circulating liquor by the water pumps to form a circulation system. The treatment method comprises the following steps: firstly, the tail gas is blown into the pretreatment chamber of the device by the blower fan, and primarily contacts with the liquid in the pretreatment chamber, and initial soakage reaction is carried out on the tail gas and the liquid; then the tail gas enters the self-excitation chamber and the atomization spray chamber, and the gas is completely purified by a series of complex reactions such as gas-liquid mass transfer, acid-base neutralization, flocculation, and the like; finally, the gas enters the gas-liquid separation chamber and the demisting chamber for liquid-gas separation and demisting; the purified gas is discharged by a chimney and the liquid enters the circulation system for recycling. The wet desulfurization and dedusting device has the advantages of simple structure, good treatment effect, etc.

The invention provides a dust removal, desulfurization and denitrification device of a coal-fired power generation boiler. The dust removal, desulfurization and denitrification device of the coal-fired power generation boiler comprises a static dust remover, a dust removal, desulfurization and denitrification primary spraying chamber, a dust removal, desulfurization and denitrification secondary spraying chamber and a static demisting chamber which are sequentially arranged from front to back and are connected through an exhaust pipeline; the static demisting chamber is internally provided with a corona wire and a dust collection pole plate; an induced draft fan is assembled in the exhaust pipeline of the static demisting chamber; a water tank with a water seal on the bottom surface is arranged below the dust removal, desulfurization and denitrification primary spraying chamber, the dust removal, desulfurization and denitrification secondary spraying chamber and the static demisting chamber; and an aerator is arranged inside the water tank, and is connected with an ozone generator. The dust removal, desulfurization and denitrification device of the coal-fired power generation boiler, provided by the invention, has the advantages of simple structure, low construction and operation cost, and high dust removal, desulfurization and denitrification efficiency. Meanwhile, the desulfurization and the denitrification of smoke can be realized through a strong oxidation function of ozone; and the conventional acid-base neutralization method is eliminated. Not only can the smoke desulfurization and denitrification process be simplified, but also the environmental friendliness problem in the raw material production caused by using lime and ammonia water as raw materials of the desulfurization and denitrification process can be solved.

The invention relates to a method for processing SO2-containing smoke gas by utilizing red mud, and is characterized in that the red mud is modulated into red mud pulp and added in a reaction tank provided with a churn-dasher; acid-base neutralization reaction is performed between the red mud and SO2 that is pumped in the smoke gas in the reaction tank; when the red mud pulp is approximately acid, all the red mud pulp is discharged and sent for filter and separation; new red mud pulp is replenished to the reaction tank at the same time; sodium sulfate can be recovered from the obtained filter liquor through evaporation and crystallization; filter residue can be directly used as cement raw material or rehabilitation backfill soil in a mine; the content of the SO2 in tail gas is less than 400mg/Nm<3>, and is less than the national standard limit. The desulfurizer that is the red mud used in the method is aluminum industrial scrapped parts, the source is rich, the cost is low, and the red mud is easy to obtain; the desulphurization principle is acid-base neutralization; the red mud has strong absorptive capacity to the SO2, and the desulphurization effect is good; the modification treatment of the red mud is realized when in desulphurization, and the purpose of waste control by waste and comprehensive utilization.